EP2052246A1 - Procede pour le controle de la structure d'un assemblage par soudure - Google Patents

Procede pour le controle de la structure d'un assemblage par soudure

Info

Publication number
EP2052246A1
EP2052246A1 EP07802466A EP07802466A EP2052246A1 EP 2052246 A1 EP2052246 A1 EP 2052246A1 EP 07802466 A EP07802466 A EP 07802466A EP 07802466 A EP07802466 A EP 07802466A EP 2052246 A1 EP2052246 A1 EP 2052246A1
Authority
EP
European Patent Office
Prior art keywords
microstructure
ultrasonic surface
surface wave
determining
probes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07802466A
Other languages
German (de)
English (en)
Inventor
Korbinian Puchner
Michael Siegel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to EP07802466A priority Critical patent/EP2052246A1/fr
Publication of EP2052246A1 publication Critical patent/EP2052246A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
    • G01N29/075—Analysing solids by measuring propagation velocity or propagation time of acoustic waves by measuring or comparing phase angle
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
    • G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/042—Wave modes
    • G01N2291/0423—Surface waves, e.g. Rayleigh waves, Love waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/10—Number of transducers
    • G01N2291/103—Number of transducers one emitter, two or more receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/267—Welds
    • G01N2291/2675—Seam, butt welding
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/269—Various geometry objects
    • G01N2291/2693—Rotor or turbine parts

Definitions

  • the invention relates to a method for testing the microstructure of a welded joint on an inner or from the outer surface of a component extending to deeper cross-sections damage, for example due to material creep.
  • Creep operated live steam pipelines.
  • the method should be less labor-intensive and time-consuming and thus more cost-effective and reliable overall.
  • a method with the following steps is used for testing the microstructure of a welded joint for internal damage: generating at least one ultrasonic surface wave by means of a first test head, receiving the at least one ultrasonic surface wave by means of a second
  • Probe determining the acoustic properties, in particular the speed of sound, in the microstructure of the welded joint based on the relation between generated and received ultrasonic surface wave, determining the degree of damage of the internal
  • Microstructure of the welded joint on the basis of the determined acoustic properties.
  • the invention for testing the microstructure of a weld test probes are set, which allow a highly accurate measurement of the acoustic properties, in particular the speed of sound of ultrasonic waves.
  • the ultrasonic waves are emitted from the surface into the depth of the welded joint and move in particular as ultrasonic waves of different penetration depth (Rayleigh surface wave) within the microstructure.
  • the measurement of the acoustic Properties do not take place as conventionally usual with sound impulses, but with the help of a continuous surface wave.
  • the method according to the invention also advantageously comprises the steps of determining the phase shift between the at least one transmitted and the at least one received ultrasonic surface wave and determining the acoustic properties, in particular the speed of sound, in the microstructure on the basis of the determined phase shift.
  • broadband piezoelectric probes with a corresponding feed wedge are preferably used, which are fed by a function generator with a sinusoidal voltage signal.
  • the transmit signal as well as a pre-amplified receive signal are simultaneously applied to separate channels of an oscilloscope, whereby the phase shift between the two signals can be determined.
  • the two probes are preferably moved relative to one another.
  • This movement of the probes can be carried out by means of mechanized manipulators, which in particular comprise a high-precision displacement measuring system. In this way, a backlash-free and exactly reproducible displacement of the two probes is possible.
  • mechanized manipulators which in particular comprise a high-precision displacement measuring system. In this way, a backlash-free and exactly reproducible displacement of the two probes is possible.
  • the probes are particularly preferably moved relative to one another over a distance of the length of a plurality of wavelengths, and the average wavelength of the ultrasonic surface wave in the microstructure is calculated therefrom.
  • Head of the test head could vary. This is circumvented by comparable signal acquisition conditions for two identically aligned probes acting as receivers.
  • FIG. 1 shows a cross section of a component tested by the method according to the invention
  • FIG. 4 shows a perspective view of a component tested according to the invention in a so-called coarse scanning
  • FIG. 5 shows a perspective view of a component tested according to the invention in a so-called fine scanning
  • FIG. 6 shows a perspective view of a component tested according to the invention with an illustrated position of measuring tracks
  • FIG. 7 shows a first embodiment of a measurement setup for the method according to the invention
  • FIG. 9 shows a third exemplary embodiment of a measurement setup for the method according to the invention
  • FIG. 10 shows a schematic representation of the development of measurement parameters determined according to the invention over the stress duration of a component subject to high temperature stress.
  • FIG. 1 illustrates a cross-section of a component 10 on which a first weld seam 12 and a second weld seam 14 are located.
  • a method for testing the microstructure for internal damage in particular for creep damage, such as due to material creep.
  • an ultrasonic surface wave is generated on a surface 16 of the component 10 in a test head, not shown in Fig. 1, which is received or recorded by means of a second test head, also not shown in FIG.
  • From a comparison of the received ultrasonic surface wave with the transmitted ultrasonic surface wave and a speed of sound calculated therefrom in the microstructure of the component 10 can, as explained in more detail below, the degree of damage of the microstructure are determined.
  • the method allows a depth-dependent testing of time-stressed or time-standing damaged welded joints. This test is possible even at a usually found in welded joints inhomogeneous structure structure with high local and depth-dependent differences in the material properties.
  • the method ensures that the result is based purely on physical quantities and objectively collected.
  • the speed of sound in the microstructure of the component 10 can be changed by changing the frequency of the transmitted ultrasonic surface waves whose penetration depth. With these so-called Rayleigh waves, a depth profile of the speed of sound in the microstructure of the component 10 can then be created. Through targeted integral detection of the acoustic properties at different penetration depths, a sonic velocity profile can be created with the ultrasonic surface waves in this way, the course of which is sensitively influenced by progress of damage to the component 10. This represents a significant gain in knowledge, especially in the assessment of cemetery damage.
  • FIG. 1 illustrates that, assuming a maximum pore concentration at the surface 16, an ultrasound surface wave 18 of low penetration first penetrates only a region 20 of the most damaged microstructure. Assuming a steady assumption of the damage with the depth of the component 10, the less damaged material fraction integrally detected by the ultrasonic surface wave 18 increases in proportion as the penetration depth increases (see FIG. 1).
  • FIG. 1 a variation of a frequency f from f 1 to f 2 is illustrated, which lies in a range from 400 kHz to 3 MHz.
  • the wavelength of the associated ultrasonic surface wave ⁇ changes from a value ⁇ i to a value of X 2 with penetration depths of approximately 1 mm to approximately 8 mm.
  • Fig. 2 it is illustrated that a near-surface creep damage thus leads to significantly different speed of sound between the surface 16 and a lower portion of the component 10 (see curve 22), while at a damage-free or undamaged material a nearly depth-constant course (see trace 24) is observed. From the curvature behavior of the measurement curves 22 and 24 or their curve gradient can thus be concluded that the damage progress in relation to the surface 16 as a reference region.
  • frequencies are selected, resulting in a number of layers or support points which describe the course of the speed of sound in relation to the distance to the surface 16.
  • frequencies between about 400 kHz to about 3 MHz are selected, resulting in a penetration depth of up to 8 mm for the materials usually to be examined. The measuring depth with the method of this kind is therefore considerable.
  • the equation fulfills the requirements for a mathematical description model in a largely optimal way.
  • two characteristic quantities are sufficient for the description of all measurement curves, namely the specification of a surface acoustic velocity C 0 and of a gradient coefficient K.
  • the integral sound velocity at any point in the interior of the component can be calculated from the known curve.
  • the integral sound velocity at any point in the interior of the component can be calculated from the known curve.
  • FIGS. 4 to 6 illustrate the spatial procedure in the method according to the invention for testing the microstructure of a weld seam 12 on a component 10.
  • a so-called coarse scanning (FIG. 4) is carried out for an overview evaluation, whereby individual ones
  • Measuring tracks 26 transverse to the longitudinal extent of the weld 12th are directed. These measuring tracks 26 represent the path between two test heads (illustrated below in FIGS. 7 to 9), which are moved individually or optionally together along these measuring tracks 26. With the coarse scanning illustrated in FIG. 4, defects in the microstructure of the weld 12 as well as the immediately surrounding component are detected. In a second method step, so-called fine scanning, illustrated in FIG. 5, individual measuring tracks 26 are subsequently aligned parallel to the longitudinal extent of the weld seam 12. In this way, a detailed assessment of the material volume takes place. From the individual measurements oriented in this way, both a sound velocity profile and a gradient profile of measurement curves, as illustrated in FIGS. 2 and 3, are obtained. From the change of these measurement curves during the life of the associated component can be concluded that a progressively developing damage to the weld 12.
  • FIG. 6 again illustrates that, according to the procedure according to the invention, a complete characterization of a weld 12 in its spatial extent is possible, this spatial extent being the length of the measurement tracks 26, the number and the spacing of the individual measurements and the penetration depth of the ultrasound - Surface waves results.
  • FIG. 7 illustrates a first exemplary embodiment of a measurement setup 28 for carrying out the method according to the invention. It is a first, acting as a transmitter for ultrasonic surface wave probe 30 and a second, acting as a receiver of the ultrasonic surface wave probe 32 is provided.
  • the two probes 30 and 32 are arranged on a manipulator 34, by means of which a virtually backlash-free and exactly reproducible displacement of the two probes 30 and 32 on the component 10 to be tested along a straight line is ensured.
  • the relative Traversing position of the two probes 30 and 32 is recorded via a high-precision displacement measuring system 36.
  • the acting as a transmitter probe 30, which is designed as a broadband piezoelectric probe with a corresponding Vorlaufkeil is fed by a function generator 38 with a sinusoidal voltage signal and thereby generates a continuous ultrasonic surface wave.
  • This ultrasonic surface wave propagates on the surface 16 of the component 10 along an axis of the test head 30 and is received by the test head 32 arranged in the opposite direction.
  • the transmitter signal as well as the preamplified signal received by the probe 32 are simultaneously applied to separate channels of an oscilloscope 40, whereby a phase shift between the two signals can be determined.
  • the displacement during a measuring operation is approximately 50 mm to approximately 100 mm, depending on the dimensions of the component 10 to be tested and the size of the probes 30 and 32 used, the change in the phase shift being recorded as a function of the measuring length.
  • the thus determined data allow due to taking into account the number of swept phase shifts and the length of the measuring section, the calculation of a mean wavelength of the ultrasonic surface wave in the component 10.
  • the speed of sound c in the component 10 is then based on the wavelength ⁇ and the frequency f, which by the frequency generator 38 is predetermined, calculated. By averaging the wavelength over the travel of the probes 30 and 32 in this way a very high measurement accuracy can be achieved.
  • a damage of the microstructure of a weld seam 12 or 14 on the component 10 that is near the surface leads to a depth-dependent gradient of the ascertained sound velocity c and through an evaluation of the
  • Velocity profiles across the cross-section of the weld 12 or 14 allow conclusions to be drawn as to their degree of damage.
  • the above-explained coarse scanning (FIG. 4) makes it possible to detect defects within a short time, with conspicuous measuring points subsequently being subjected to a detailed fine scanning (FIG. 5) in a refined testing process (using a plurality of measurement frequencies).
  • Fig. 8 is an alternative embodiment of a
  • Measurement setup 28 illustrated in which two probes 30 and 32 are each arranged in a fixed horrovipfan onion. These probes 30 and 32 are each connected to a function generator 38 and an oscilloscope 40 again. In contrast to the measuring structure 28 shown in FIG. 7, a displacement of the probes 30 and 32 by means of a manipulator is not provided here, but the probes 30 and 32 are arranged stationary and the measuring frequency is varied as a variable variable. Due to this procedure, the costs for the manipulator and the displacement measuring system are eliminated. The measurement can also be fully automatic.
  • the arrangement according to FIG. 8 can also be used to change the phase position between the two signals relative to one another at constant test head spacing
  • Reference value eg base material
  • the rigid arrangement of the probes 30 and 32 is moved across the weld and evaluated the local changes in the phase position in response to material changes. This can be done electronically (Comparator circuit). The frequency range and thus the depth effect of the method remain unaffected.
  • FIG. 9 illustrates an embodiment of a measurement setup 28 in which a total of three stationary probes 30, 32 and 42 are provided, of which the test head 30 is connected to a function generator 38 and the probes 32 and 42 are connected to an oscilloscope 40 as a receiver ,
  • the signals of the two acting as a receiver probes 32 and 42 are adjusted to the phase equality.
  • the precision of the measurement can be further increased, since in a head-to-head arrangement of the metrologically relevant fürmaschinepfabstand could vary by a variable with the measurement frequency exit point from the Vorlaufkeil the associated test head, but this by the presently provided comparable conditions for the Signal recording at the two acting as a receiver probes 32 and 42 can be bypassed with identical orientation.
  • FIG. 10 illustrates an evaluation of progressions of the speed of sound over the cross section of one of the weld seams 12 or 14.
  • FIG. 10 illustrates that a description of the damage state of the microstructure on a weld seam is possible by the sound velocity profile.
  • Fig. 10 shows a total of four curves 44, 46, 48 and 50, each of which illustrate the course of the gradient of the speed of sound over a position transverse to a longitudinal extent of a weld.
  • the line 44 shows a weld in new condition
  • the line 46 an operationally stressed weld
  • the line 48 an advanced operationally stressed weld
  • line 50 finally, a weld with damaged microstructure.
  • the line 44 basically has an M-shape, which extends with its two maxima in the region of melting lines 52 and 54, respectively. These melting lines form the respective Boundary region between one side of the weld and the adjacent component.
  • the basically M-shaped line 44 thus flattens out over the increasing service life of the associated component (see lines 46 and 48 in FIG. 10).
  • this change of the gradient K from an M-shape in the new state via a flattening in the operational state to a W-shape in the damaged state clearly the qualitative development course at the associated Weld seam shows.
  • the microstructure In the initial state of a weld, the microstructure has a very inhomogeneous distribution, in particular in the area of the melting lines (solidification structure) different states. This manifests itself within the measurement curves or lines 44 to 50 by locally limited to these areas gradient coefficient K high degree. If a leveling in the course of the gradient coefficient K over the weld cross-section is to be determined, the metrological proof of a long-term operating stress on high
  • Material volume in the area of the melting line 52 and 54 extends is to detect a camber of the center of gravity in the direction of the heat fusion lines 52 and 54 after a crosstalk damage occurs.
  • the material structure or the material structure within the melting lines 52 and 54 (fine grain zone) thus reacts particularly sensitively to a time-dependent material change and thus represents the function of an early indicator

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

L'invention concerne un procédé pour le contrôle de la structure d'un assemblage par soudure (10, 12, 14) pour endommagement interne, dû par exemple à un fluage du matériau, lequel procédé comprend les étapes : production d'au moins une onde ultrasonore superficielle au moyen d'une première tête de contrôle (30), réception de ladite au moins une onde ultrasonore superficielle au moyen d'une deuxième tête de contrôle (32, 42), détermination des propriétés acoustiques dans la structure sur la base de la relation entre les ondes superficielles ultrasonores produite et reçue et détermination du degré d'endommagement de la structure interne sur la base des propriétés acoustiques déterminées.
EP07802466A 2006-08-16 2007-08-02 Procede pour le controle de la structure d'un assemblage par soudure Withdrawn EP2052246A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07802466A EP2052246A1 (fr) 2006-08-16 2007-08-02 Procede pour le controle de la structure d'un assemblage par soudure

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06017048A EP1890140A1 (fr) 2006-08-16 2006-08-16 Procédé destiné à vérifier la structure d'une soudure
PCT/EP2007/058003 WO2008019948A1 (fr) 2006-08-16 2007-08-02 Procédé pour le contrôle de la structure d'un assemblage par soudure
EP07802466A EP2052246A1 (fr) 2006-08-16 2007-08-02 Procede pour le controle de la structure d'un assemblage par soudure

Publications (1)

Publication Number Publication Date
EP2052246A1 true EP2052246A1 (fr) 2009-04-29

Family

ID=37814676

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06017048A Withdrawn EP1890140A1 (fr) 2006-08-16 2006-08-16 Procédé destiné à vérifier la structure d'une soudure
EP07802466A Withdrawn EP2052246A1 (fr) 2006-08-16 2007-08-02 Procede pour le controle de la structure d'un assemblage par soudure

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06017048A Withdrawn EP1890140A1 (fr) 2006-08-16 2006-08-16 Procédé destiné à vérifier la structure d'une soudure

Country Status (4)

Country Link
US (1) US20090320598A1 (fr)
EP (2) EP1890140A1 (fr)
JP (1) JP2010500591A (fr)
WO (1) WO2008019948A1 (fr)

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
US9063059B2 (en) 2011-05-10 2015-06-23 Edison Welding Institute, Inc. Three-dimensional matrix phased array spot weld inspection system
DE102015114855A1 (de) * 2015-09-04 2017-03-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zur Erfassung von Schädigungen eines Kunststoff-Metall- oder Metall-Metall-Verbundbauteils
US10598636B2 (en) * 2015-12-31 2020-03-24 VeriPhase, Inc. Ultrasonic weld analysis for orthotropic steel decking systems in bridges
US10636064B2 (en) * 2015-12-31 2020-04-28 VeriPhase, Inc. Method for monetization of the data processing of ultrasonic scan data files
US10126273B2 (en) * 2016-02-29 2018-11-13 The Boeing Company Inspection of structures
CN106093203B (zh) * 2016-08-25 2018-10-12 杨振峰 一种焊接表面及近表面裂纹深度检测装置
CN113189205B (zh) * 2021-03-23 2022-11-08 国能锅炉压力容器检验有限公司 一种超声导波检测在役主汽管道蠕变损伤的方法

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FR2551874A1 (fr) * 1983-09-09 1985-03-15 Electricite De France Procede et dispositif de controle d'une piece metallique par ultrasons
JP2001021542A (ja) * 1999-07-07 2001-01-26 Osaka Gas Co Ltd 溶接線横割れ欠陥長さ測定方法

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US4372163A (en) * 1981-02-03 1983-02-08 Rockwell International Corporation Acoustic measurement of near surface property gradients
US4545249A (en) * 1983-09-06 1985-10-08 Trw Inc. Acoustical position gage
DE4116584A1 (de) * 1991-05-22 1992-11-26 Nukem Gmbh Verfahren und vorrichtung zur zerstoerungsfreien feststellung von werkstoffkennwerten
US5894092A (en) * 1996-09-27 1999-04-13 Industrial Quality, Inc. Method and system for obtaining near-surface characteristics of materials using ultrasonic Rayleigh waves
DE19640859B4 (de) * 1996-10-03 2006-08-17 Schmitt-Thomas, Karlheinz G., Prof. Dr.-Ing. Verfahren und Vorrichtung zur zerstörungsfreien Feststellung des Werkstoffzustands in Bauteilen
JP3652943B2 (ja) * 1999-11-29 2005-05-25 三菱重工業株式会社 金属材料の損傷評価方法及び装置
US6948369B2 (en) * 2002-02-06 2005-09-27 Applied Metrics, Inc. Methods for ultrasonic inspection of spot and seam resistance welds in metallic sheets and a spot weld examination probe system (SWEPS)

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Publication number Priority date Publication date Assignee Title
FR2551874A1 (fr) * 1983-09-09 1985-03-15 Electricite De France Procede et dispositif de controle d'une piece metallique par ultrasons
JP2001021542A (ja) * 1999-07-07 2001-01-26 Osaka Gas Co Ltd 溶接線横割れ欠陥長さ測定方法

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Title
See also references of WO2008019948A1 *

Also Published As

Publication number Publication date
EP1890140A1 (fr) 2008-02-20
JP2010500591A (ja) 2010-01-07
US20090320598A1 (en) 2009-12-31
WO2008019948A1 (fr) 2008-02-21

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