US3679403A - Method of improving macrostructure of titanium-base alloy products - Google Patents

Method of improving macrostructure of titanium-base alloy products Download PDF

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Publication number
US3679403A
US3679403A US34674A US3679403DA US3679403A US 3679403 A US3679403 A US 3679403A US 34674 A US34674 A US 34674A US 3679403D A US3679403D A US 3679403DA US 3679403 A US3679403 A US 3679403A
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Prior art keywords
alloy
percent
titanium
yttrium
macrostructure
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Expired - Lifetime
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US34674A
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English (en)
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Howard B Bomberger Jr
Stanley R Seagle
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RMI Co
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RMI Co
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
    • C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
    • C22C32/0031—Matrix based on refractory metals, W, Mo, Nb, Hf, Ta, Zr, Ti, V or alloys thereof
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C14/00—Alloys based on titanium

Definitions

  • This invention relates to a method of improving the" macrostructure of titanium-base alloys and to the resulting product.
  • Coarse grain structures or a spangled surface condition 'cent by weight may consist of any combination of the usual alloying elements for titanium; including aluminum, tin, vanadium, zirconium, chromium, molybdenum, iron, oxygen, nitrogen and others. Our method is applicable to alloys which con- .tain alpha and/or beta phases. Surprisingly it is not applicable to unalloyed titanium nor to alloys which contain less than about 3 percent by weight ofalloying elements.
  • yttrium is costly, we prefer to add it in the minimum quantity to achieve the desired improvement in macrostructure of the alloy. Additions of yttrium to produce a content in excess of our upper limit tend to make alloys more difficult to work, even though they may achieve the desired improvement in macrostructure.
  • yttrium may be added to the alloy either in the form of the metal itself or a compound, such as the oxide Y O provided the other elements in the compound have no adverse eifect on the final alloy or are within allowable limits.
  • An object of the present invention is to provide a method of improving the macrostructure of titaniumb ase alloy products through yttrium additions without adversely affecting other properties.
  • more specific object is to provide a method of improving the macrostructure of titanium base alloy products in which we add yttrium to the alloy, but compensate for the adverse eifect on tensile properties by increasing the content of strengthening agents, preferably oxygen and/or nitrogen.
  • a further object is to provide an improved titaniumbase alloy product which results from practicing our method.
  • Our method is applicable to alloys which contain a minimum of about 70 percent by weight titanium. Most alloys for which our method is useful have a titanium content no greater than about 95' percent by weight, and our preferred range is about 70 to 95 percent titanium. Nevertheless our method may be useful for some alloys;
  • Yttrium has little solubility in titanium, but tends to form a fine refractoryv oxide precipitate with a melting point above 4300 R, which is substantially higher than the melting point of titanium.
  • Table 1 which follows, demonstrates the benefits we have obtained in controlling the grain size of various titaniur n ba se alloys by adding yttrium.
  • FIG. 1 is a photograph of a macroet ch ed surface pf a titanium-base alloy product'ih which there is no yttrium;
  • the alloy shown in FIG. 1 (Heat N0. X29297-1) in which yttrium is absent has an objection ably spangled surface.
  • the alloy shown in FIG. 2 (Heat No.X29299-1) hasno spangled surface. Table 2, which follows, demonstrates'th" elfect of'yttrium additions in increasing the sensitivity of sonictestin'g for flaws in billets of 6-4 alloy.
  • a No. 5 Hole Test is a sonic test adjusted to locate flaws %2 inch; or more in diameter internally of a test specimen.
  • the titanium-base alloy whichnominally'contains Gpercent aluminum, 6 percent vanadium, 2 percent tin, and the balance substantially 'rnnnn a-nrrnc'r or Y'r'rmtm ADDITION'ON moams'me some 'rns'rmo SENSITIV f H w
  • Number 5 hole test Number 3 hole test2 I Percent Bm t ⁇ u Background, percent 7. Background, percent e s Heat number Y0 Yttrium inches 1 Ma noise Ave. noise Mar. noise Ave.
  • Table 3 which"follows, shows the resultsof tensile ee wrm a se i of o-62i n hb te qrmed. owe-4,". alloy. In these .tests wemaintained the oxygen content at v0.17% and increased the yttrium content of the different bars from nil to 0.20%.
  • Table 5 which follows, shows the efiect of yttrium oxide additions on 0.625 inch bars of a number of other titanium-base alloys.
  • pensation is obtained by raising the oxygen content by about 0.01 to 0.06 percent.
  • a method of improving the macrostructure of titanium-base alloy products which contain about 70 to 97 percent by weight titanium comprising adding to the alloy about 0.03 to 0.40 percent by weight yttrium, and compensating for the loss of tensile properties which would otherwise result from the yttrium addition by raising the content of at least one of the strengthening agents of the group consisting of oxygen and nitrogen above the normal level present in the alloy in the absence of yttrium by amounts of about 0.01 to 0.06 percent by weight of the alloy in the case of oxygen and 0.01 to 0.03 percent by weight of the alloy in the case of nitrogen.

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  • 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)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Powder Metallurgy (AREA)
US34674A 1970-05-05 1970-05-05 Method of improving macrostructure of titanium-base alloy products Expired - Lifetime US3679403A (en)

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US3467470A 1970-05-05 1970-05-05

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US (1) US3679403A (2)
CA (1) CA937072A (2)
DE (1) DE2122053A1 (2)
FR (1) FR2091242A5 (2)
GB (1) GB1350693A (2)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2543893A1 (de) * 1974-10-02 1976-04-08 Nat Distillers Chem Corp Verfahren zur herstellung eines warmgeformten produktes aus titan
US4075070A (en) * 1976-06-09 1978-02-21 Ppg Industries, Inc. Electrode material
US4079523A (en) * 1976-11-08 1978-03-21 The International Nickel Company, Inc. Iron-titanium-mischmetal alloys for hydrogen storage
US4129438A (en) * 1976-03-23 1978-12-12 Rmi Company Method of adding trace elements to base metals
US4639281A (en) * 1982-02-19 1987-01-27 Mcdonnell Douglas Corporation Advanced titanium composite
US4830823A (en) * 1987-01-28 1989-05-16 Ohara Co., Ltd. Dental titanium alloy castings
US5830288A (en) * 1994-09-26 1998-11-03 General Electric Company Titanium alloys having refined dispersoids and method of making
CN116334444A (zh) * 2023-03-10 2023-06-27 深圳市优米特新材料科技有限公司 一种高强高可焊接性的眼镜框架连接件及其制备方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2567153B1 (fr) * 1984-07-06 1991-04-12 Onera (Off Nat Aerospatiale) Procede d'elaboration, par metallurgie des poudres, d'alliage a base de titane a faible dimension de grain
US5120350A (en) * 1990-07-03 1992-06-09 The Standard Oil Company Fused yttria reinforced metal matrix composites and method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2543893A1 (de) * 1974-10-02 1976-04-08 Nat Distillers Chem Corp Verfahren zur herstellung eines warmgeformten produktes aus titan
US3963525A (en) * 1974-10-02 1976-06-15 Rmi Company Method of producing a hot-worked titanium product
US4129438A (en) * 1976-03-23 1978-12-12 Rmi Company Method of adding trace elements to base metals
US4075070A (en) * 1976-06-09 1978-02-21 Ppg Industries, Inc. Electrode material
US4133730A (en) * 1976-06-09 1979-01-09 Ppg Industries, Inc. Electrolysis of brine using titanium alloy electrode
US4079523A (en) * 1976-11-08 1978-03-21 The International Nickel Company, Inc. Iron-titanium-mischmetal alloys for hydrogen storage
US4639281A (en) * 1982-02-19 1987-01-27 Mcdonnell Douglas Corporation Advanced titanium composite
US4830823A (en) * 1987-01-28 1989-05-16 Ohara Co., Ltd. Dental titanium alloy castings
US5830288A (en) * 1994-09-26 1998-11-03 General Electric Company Titanium alloys having refined dispersoids and method of making
CN116334444A (zh) * 2023-03-10 2023-06-27 深圳市优米特新材料科技有限公司 一种高强高可焊接性的眼镜框架连接件及其制备方法

Also Published As

Publication number Publication date
FR2091242A5 (2) 1972-01-14
CA937072A (en) 1973-11-20
DE2122053A1 (de) 1971-11-25
GB1350693A (en) 1974-04-18

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