EP0110190A1 - Alliages d'aluminium pour appareillage nucléaire - Google Patents

Alliages d'aluminium pour appareillage nucléaire Download PDF

Info

Publication number: EP0110190A1
Authority: EP; European Patent Office
Prior art keywords: aluminium alloys; alloys; weight; balance; nuclear
Prior art date: 1982-11-26
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.): Granted

Application number

EP83111019A

Other languages

German (de)

English (en)

Other versions

EP0110190B1 (fr

Inventor

Paolo Fiorini

Giuseppe Giordano

Giovanni Piatti

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.)

Aluminia SpA

Original Assignee

Alluminio Italia SpA

Aluminia SpA

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.)

1982-11-26

Filing date

1983-11-04

Publication date

1984-06-13

1983-11-04 Application filed by Alluminio Italia SpA, Aluminia SpA filed Critical Alluminio Italia SpA

1983-11-04 Priority to AT83111019T priority Critical patent/ATE25467T1/de

1984-06-13 Publication of EP0110190A1 publication Critical patent/EP0110190A1/fr

1987-02-11 Application granted granted Critical

1987-02-11 Publication of EP0110190B1 publication Critical patent/EP0110190B1/fr

Status Expired legal-status Critical Current

Links

229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 13
230000004927 fusion Effects 0.000 claims abstract description 9
239000000203 mixture Substances 0.000 claims abstract description 7
229910045601 alloy Inorganic materials 0.000 abstract description 20
239000000956 alloy Substances 0.000 abstract description 20
238000000034 method Methods 0.000 description 8
229910052782 aluminium Inorganic materials 0.000 description 4
230000007797 corrosion Effects 0.000 description 4
238000005260 corrosion Methods 0.000 description 4
239000000126 substance Substances 0.000 description 4
239000000654 additive Substances 0.000 description 3
XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
239000004411 aluminium Substances 0.000 description 3
238000001125 extrusion Methods 0.000 description 3
239000012535 impurity Substances 0.000 description 3
239000000463 material Substances 0.000 description 3
229910052710 silicon Inorganic materials 0.000 description 3
PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
229910052804 chromium Inorganic materials 0.000 description 2
229910052802 copper Inorganic materials 0.000 description 2
229910052593 corundum Inorganic materials 0.000 description 2
230000000694 effects Effects 0.000 description 2
229910052742 iron Inorganic materials 0.000 description 2
229910052749 magnesium Inorganic materials 0.000 description 2
229910052748 manganese Inorganic materials 0.000 description 2
229910052759 nickel Inorganic materials 0.000 description 2
239000000843 powder Substances 0.000 description 2
238000004663 powder metallurgy Methods 0.000 description 2
239000011265 semifinished product Substances 0.000 description 2
238000005245 sintering Methods 0.000 description 2
230000035882 stress Effects 0.000 description 2
229910052720 vanadium Inorganic materials 0.000 description 2
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
229910001845 yogo sapphire Inorganic materials 0.000 description 2
229910052725 zinc Inorganic materials 0.000 description 2
229910008329 Si-V Inorganic materials 0.000 description 1
229910006768 Si—V Inorganic materials 0.000 description 1
229910000756 V alloy Inorganic materials 0.000 description 1
230000004913 activation Effects 0.000 description 1
230000032683 aging Effects 0.000 description 1
229910052796 boron Inorganic materials 0.000 description 1
238000005266 casting Methods 0.000 description 1
238000011437 continuous method Methods 0.000 description 1
230000007812 deficiency Effects 0.000 description 1
238000005516 engineering process Methods 0.000 description 1
238000010438 heat treatment Methods 0.000 description 1
238000000265 homogenisation Methods 0.000 description 1
238000010791 quenching Methods 0.000 description 1
230000000171 quenching effect Effects 0.000 description 1
238000005096 rolling process Methods 0.000 description 1
229910052719 titanium Inorganic materials 0.000 description 1
229910052726 zirconium Inorganic materials 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent

Definitions

This invention relates to aluminium alloys possessing time-stable mechanical, physical and chemical characteristics suitable for their use in nuclear apparatus, in particular in the first wall of nuclear fusion reactors.
the first wall of a nuclear fusion reactor is known to require the use of materials able to withstand very critical operating conditions for a long period of time (up to 10 years), they being subjected to temperatures up to 350-400°C (with a minimum of 120°C), to neutron irradiation and to corrosion in very pure water.
pure aluminium Because of its low activity following neutron irradiation, pure aluminium might appear to be a material suitable for this purpose. However, when in the pure state and especially when hot, this material has low mechanical properties and low corrosion resistance, insufficient for its use for the aforesaid application.
hyper-pure alloys containing conventional additives of low activity would leave the problem of hot corrosion resistance in very pure water unsolved.
the object of the present invention is therefore to provide aluminium alloys having the necessary initial mechanical, physical and chemical characteristics for their use in nuclear apparatus, in particular in the first wall of nuclear fusion reactors, said alloys being also able to maintain said initial characteristics substantially stable with time during their use.
Said alloys can be prepared by the known typical casting methods for Al alloys (fusion-produced alloys).
suitable known cycles comprising homogenisation, extrusion a nd/or rolling, and/or other plastic deformation processes which may be necessary, as known to experts of the art.
Said alloys according to the invention can also be prepared (in particular alloys containing Si) by the known powder technology method.
a dispersed phase of Al 2 O 3 and/or Al 2 O 3 .MgO type can also be present.
compositions for the alloys prepared by fusion according to the invention comprise 2.5-3% of Mg, 0.1-0.5% of V, possibly 0.05-0.2% of Si, and less than 150 p.p.m. of conventional impurities, the balance to 100% being Al (quantities expressed by weight).
Preferred compositions for alloys prepared by powder metallurgy according to the invention comprise 0.2-1% of Mg, 0.2-1% of Si, 0.5-2% of V, and less than 150 p.p.m. of conventional impurities, the balance to 100% being Al (quantities expressed by weight). Alloys prepared by fusion are particularly suitable for maximum operating temperatures of 150-200 C for the said wall, whereas powder -produced alloys are preferred for temperatures above 200°C and up to 350-400°C.
a billet is cast by the semi-continuous method from an Al-Mg-V alloy which on chemical analysis shows the following composition (quantities expressed as % by weight):
Said billet is homogenised for 15 hours at 400°C and 24 hours at 460°C, and is then extruded at 420°C to a diameter of 14 mm. From the extrusion obtained in this manner, samples of the required size are prepared by known methods for determining tensile, physical and creep behaviour characteristics (by ASTM procedures), these characteristics being shown hereinafter (the known symbols R,
Example 1 The procedure of Example 1 is followed, the only difference being that the alloy composition is as follows (quantities expressed in % by weight): Mg 2.68%; V 0.21%; Fe 12 p.p.m.; Si 11 p.p.m.; Cu 10 p.p.m.; Mn 5 p.p.m.; Ni 3 p.p.m.; Zn 2 p.p.m.; Ti less than 1 p.p.m.; Al balance to 100%.
the alloy composition is as follows (quantities expressed in % by weight): Mg 2.68%; V 0.21%; Fe 12 p.p.m.; Si 11 p.p.m.; Cu 10 p.p.m.; Mn 5 p.p.m.; Ni 3 p.p.m.; Zn 2 p.p.m.; Ti less than 1 p.p.m.; Al balance to 100%.
Powdered Al (purity 99.99%), Mg, Si and V were used (in the weight proportions of Mg 0.97%, V 1.1%, Si 0.71%, Al balance to 100%) to prepare by the known powder metallurgy method a Al-Mg-Si-V alloy in the form of a billet of size 80 mm diameter x 200 mm, using the following main basic parameters: sintering temperature 580°C; sintering time 24 hours; hot compacting at 580°C with a pressure of 550 N/mm 2 ; billet extrusion at 450°C to a diameter of 10 mm; solution heat-treatment for 2 hours at 520°C; rapid quenching followed by ageing at 150 0 C for 15 hours.
said extruded billet shows the following composition (% by weight): Mg 0.66%; V 1.07%; Si 0.65%; Fe 80 p.p.m.; Cu 12 p.p.m.; Mn 7 p.p.m.; Zn 3 p.p.m.; Ni 2 p.p.m.; Ti less than 1 p.p.m.; Al balance to 100%.
said alloys have good resistance to corrosion in a moist environment, both at room temperature and under hot conditions (100-150°C), and in addition have excellent weldability by all the typical methods for aluminium, and good workability for producing semi-finished products, even of complex form.
the alloys according to the invention are suitable for use in nuclear apparatus components, in particular in the first wall of nuclear fusion reactors, in accordance with the objects of the invention itself.

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Materials Engineering (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Manufacture And Refinement Of Metals (AREA)
Powder Metallurgy (AREA)

EP83111019A 1982-11-26 1983-11-04 Alliages d'aluminium pour appareillage nucléaire Expired EP0110190B1 (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
AT83111019T ATE25467T1 (de)	1982-11-26	1983-11-04	Aluminiumlegierungen fuer kernanlagen.

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
IT2445782		1982-11-26
IT24457/82A IT1154589B (it)	1982-11-26	1982-11-26	Leghe di alluminio per apparecchiature nucleari

Publications (2)

Publication Number	Publication Date
EP0110190A1 true EP0110190A1 (fr)	1984-06-13
EP0110190B1 EP0110190B1 (fr)	1987-02-11

Family

ID=11213592

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP83111019A Expired EP0110190B1 (fr)	1982-11-26	1983-11-04	Alliages d'aluminium pour appareillage nucléaire

Country Status (4)

Country	Link
EP (1)	EP0110190B1 (fr)
AT (1)	ATE25467T1 (fr)
DE (1)	DE3369796D1 (fr)
IT (1)	IT1154589B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2173214A (en) *	1985-04-02	1986-10-08	Aluminum Co Of America	Powder metallurgy
EP0808911A1 (fr) *	1996-05-22	1997-11-26	Alusuisse Technology & Management AG	Elément de construction
EP0967294A1 (fr) *	1998-06-26	1999-12-29	ALUMINIUM RHEINFELDEN GmbH	Procede de traitement d'un bain d'aluminium

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1903842A (en) *	1932-05-20	1933-04-18	Court C Titus	Aluminum alloy
FR808156A (fr) *	1935-07-26	1937-01-30	Ig Farbenindustrie Ag	Alliages d'aluminiume et leurs applications
FR1034260A (fr) *	1951-03-21	1953-07-21		Alliage à base d'aluminium et de vanadium
US3236632A (en) *	1964-12-01	1966-02-22	Dow Chemical Co	High strength aluminum alloy for pellet extrusion and product
US4043840A (en) *	1976-07-09	1977-08-23	Swiss Aluminium Ltd.	Aluminum alloys possessing improved resistance weldability

1982
- 1982-11-26 IT IT24457/82A patent/IT1154589B/it active
1983
- 1983-11-04 DE DE8383111019T patent/DE3369796D1/de not_active Expired
- 1983-11-04 EP EP83111019A patent/EP0110190B1/fr not_active Expired
- 1983-11-04 AT AT83111019T patent/ATE25467T1/de not_active IP Right Cessation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1903842A (en) *	1932-05-20	1933-04-18	Court C Titus	Aluminum alloy
FR808156A (fr) *	1935-07-26	1937-01-30	Ig Farbenindustrie Ag	Alliages d'aluminiume et leurs applications
FR1034260A (fr) *	1951-03-21	1953-07-21		Alliage à base d'aluminium et de vanadium
US3236632A (en) *	1964-12-01	1966-02-22	Dow Chemical Co	High strength aluminum alloy for pellet extrusion and product
US4043840A (en) *	1976-07-09	1977-08-23	Swiss Aluminium Ltd.	Aluminum alloys possessing improved resistance weldability

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2173214A (en) *	1985-04-02	1986-10-08	Aluminum Co Of America	Powder metallurgy
EP0808911A1 (fr) *	1996-05-22	1997-11-26	Alusuisse Technology & Management AG	Elément de construction
EP0967294A1 (fr) *	1998-06-26	1999-12-29	ALUMINIUM RHEINFELDEN GmbH	Procede de traitement d'un bain d'aluminium
WO2000000654A1 (fr) *	1998-06-26	2000-01-06	Aluminium Rheinfelden Gmbh	Traitement d'une masse fondue d'alliage d'aluminium
US6994759B1 (en)	1998-06-26	2006-02-07	Aluminium Rheinfelden Gmbh	Treatment of an aluminum alloy melt

Also Published As

Publication number	Publication date
DE3369796D1 (en)	1987-03-19
ATE25467T1 (de)	1987-02-15
IT1154589B (it)	1987-01-21
IT8224457A1 (it)	1984-05-26
EP0110190B1 (fr)	1987-02-11
IT8224457A0 (it)	1982-11-26

Legal Events

Date	Code	Title	Description
1984-04-16	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1984-06-13	AK	Designated contracting states	Designated state(s): AT BE CH DE FR GB LI LU NL SE
1985-02-06	17P	Request for examination filed	Effective date: 19841115
1986-09-24	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: ALUMINIA S.P.A.
1986-12-23	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1987-02-11	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): AT BE CH DE FR GB LI LU NL SE
1987-02-11	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: NL Effective date: 19870211 Ref country code: BE Effective date: 19870211 Ref country code: AT Effective date: 19870211
1987-02-11	REF	Corresponds to:	Ref document number: 25467 Country of ref document: AT Date of ref document: 19870215 Kind code of ref document: T
1987-02-28	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: SE Effective date: 19870228
1987-03-19	REF	Corresponds to:	Ref document number: 3369796 Country of ref document: DE Date of ref document: 19870319
1987-04-17	ET	Fr: translation filed
1987-07-16	NLV1	Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
1987-11-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19871130
1987-12-07	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1987-12-07	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1988-01-27	26N	No opposition filed
1988-07-27	GBPC	Gb: european patent ceased through non-payment of renewal fee
1988-11-22	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Effective date: 19881122
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