US3379522A - Dispersoid titanium and titaniumbase alloys - Google Patents

Dispersoid titanium and titaniumbase alloys Download PDF

Info

Publication number
US3379522A
US3379522A US558589A US55858966A US3379522A US 3379522 A US3379522 A US 3379522A US 558589 A US558589 A US 558589A US 55858966 A US55858966 A US 55858966A US 3379522 A US3379522 A US 3379522A
Authority
US
United States
Prior art keywords
titanium
dispersoid
alloys
particles
submicron
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.)
Expired - Lifetime
Application number
US558589A
Other languages
English (en)
Inventor
Milton B Vordahl
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.)
Titanium Metals Corp
Original Assignee
Titanium Metals 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 Titanium Metals Corp filed Critical Titanium Metals Corp
Priority to US558589A priority Critical patent/US3379522A/en
Priority to DE19671558460 priority patent/DE1558460B1/de
Priority to BE699665D priority patent/BE699665A/xx
Priority to GB26855/67A priority patent/GB1124435A/en
Application granted granted Critical
Publication of US3379522A publication Critical patent/US3379522A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making non-ferrous alloys
    • C22C1/10Alloys containing non-metals
    • C22C1/1036Alloys containing non-metals starting from a melt
    • C22C1/1047Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making non-ferrous alloys
    • C22C1/02Making non-ferrous alloys by melting
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C14/00Alloys based on titanium
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S75/00Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
    • Y10S75/956Producing particles containing a dispersed phase

Definitions

  • This invention pertains to titanium and titanium-base alloys containing submicron dispersions of particles essentially insoluble in solid titanium at any temperature, and to methods of producing such dispersoid alloys. More particularly the invention pertains to titaniumbase alloys containing submicron-sized dispersions of one or more dispersoids selected from the group consisting of boron, cerium, thorium and sulphur and combinations and compounds thereof, such as Ti-B, Ce-S, and to methods of producing the same consisting of melting the components to form a homogeneous liquid, extreme chill-casting the liquid as by splashing it in thin layers against a cold solid surface or by spraying the liquid into a cold chamber wherein it freezes as fine shot, and finally consolidating the shot and splashings by pressure, heat and plastic deformation to a product of essentially theoretically full density.
  • dispersoids selected from the group consisting of boron, cerium, thorium and sulphur and combinations and compounds thereof, such as Ti-B, Ce-S
  • the dispersoid particle components although soluble in the liquid titanium, are insoluble in solid titanium and are thus forced by freezing of the liquid to separate as particles of extreme fineness because of the very short time available for growth.
  • the dispersoid particles appear as submicron-sized dispersions within the shot or splashed flakes which, although fine themselves relative to any standard ingots, are very coarse relative to the dispersoid particles. That is, the shot or flakes may be from perhaps 50 or 100 microns to several hundred microns in mean section, and the dispersed particles therein will be on the order of less than 1 micron.
  • Another well known method of making stable dispersoid systems consists of internal oxidation of solid solutions of active metals in a less reactive base metal, such for example as titanium containing in solid solution, certain rare earth metals which can be oxidized in situ to form stable particles of oxide.
  • a less reactive base metal such for example as titanium containing in solid solution
  • certain rare earth metals which can be oxidized in situ to form stable particles of oxide.
  • the combined requirements of solid solubility of the metallic component of the dispersoid, plus greater reactivity than titanium, essentially limits the possibilities for this approach to the rare earths.
  • the rare earth oxides are stable only in titanium which of itself contains a substantial oxygen content, which is usually undesirable.
  • the dispersoids above-mentioned with reference to this invention are all insoluble in solid titanium, and when present as submicron dispersions as produced in accordance with the methods of the invention, impart outstanding elevated temperature creep properties operable to higher temperature levels than is attainable with dispersoid type titanium and titanium-base alloy materials heretofore available insofar as I am aware.
  • liquid titanium alloys containing up to 2% B or u to 6% Th or up to 3% Ce, 1% S or in combinations thereof up to enough to form a maximum of about 5 v/o of particles are shotted as described for example in US. Patent No. 2,897,539.
  • the shot are then consolidated by known methods such as canning and hot pressing.
  • Mill products are made from the hot pressed billets by conventional means.
  • Table I shows for a Ti-6Al-2Sn-4Zr- 2M0 alloy, creep strength with long-term aging without and with an inert submicron dispersoid according to the invention.
  • the method of producing in a base metal selected from the group consisting of titanium and titanium-base alloys, a submicron dispersion of a dispersoid selected from the group consisting of B, Ce, S and Th and combinations and compounds thereof, which comprises: melting said base metal and dispersoid together to produce a homogeneous molten liquid thereof, and chill-casting said molten liquid in a subdivided state to produce solid particles of said base metal containing said dispersoid as a submicron dispersion therein.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Powder Metallurgy (AREA)
US558589A 1966-06-20 1966-06-20 Dispersoid titanium and titaniumbase alloys Expired - Lifetime US3379522A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US558589A US3379522A (en) 1966-06-20 1966-06-20 Dispersoid titanium and titaniumbase alloys
DE19671558460 DE1558460B1 (de) 1966-06-20 1967-04-08 Verfahren zur Herstellung von Mikrodispersionen in Titan oder Titanlegierungen
BE699665D BE699665A (da) 1966-06-20 1967-06-08
GB26855/67A GB1124435A (en) 1966-06-20 1967-06-09 Dispersoid titanium and titanium-base alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US558589A US3379522A (en) 1966-06-20 1966-06-20 Dispersoid titanium and titaniumbase alloys

Publications (1)

Publication Number Publication Date
US3379522A true US3379522A (en) 1968-04-23

Family

ID=24230140

Family Applications (1)

Application Number Title Priority Date Filing Date
US558589A Expired - Lifetime US3379522A (en) 1966-06-20 1966-06-20 Dispersoid titanium and titaniumbase alloys

Country Status (4)

Country Link
US (1) US3379522A (da)
BE (1) BE699665A (da)
DE (1) DE1558460B1 (da)
GB (1) GB1124435A (da)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3622406A (en) * 1968-03-05 1971-11-23 Titanium Metals Corp Dispersoid titanium and titanium-base alloys
US3807995A (en) * 1971-09-07 1974-04-30 C Dohogne Metal composite
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
EP0192953A1 (en) * 1985-02-15 1986-09-03 General Electric Company Oxysulfide dispersion strengthened titanium alloys
US4639281A (en) * 1982-02-19 1987-01-27 Mcdonnell Douglas Corporation Advanced titanium composite
US4810465A (en) * 1985-04-12 1989-03-07 Daido Tokushuko Kabushiki Kaisha Free-cutting Ti alloy
US4906430A (en) * 1988-07-29 1990-03-06 Dynamet Technology Inc. Titanium diboride/titanium alloy metal matrix microcomposite material and process for powder metal cladding
US6117204A (en) * 1997-09-16 2000-09-12 Kabushiki Kaisha Toyota Chuo Kenkyusho Sintered titanium alloy material and process for producing the same
US20070079908A1 (en) * 2005-10-06 2007-04-12 International Titanium Powder, Llc Titanium boride
US20070286761A1 (en) * 2006-06-07 2007-12-13 Miracle Daniel B Method of producing high strength, high stiffness and high ductility titanium alloys
US20100307647A1 (en) * 2004-05-21 2010-12-09 Ati Properties, Inc. Metastable Beta-Titanium Alloys and Methods of Processing the Same by Direct Aging
US20110180188A1 (en) * 2010-01-22 2011-07-28 Ati Properties, Inc. Production of high strength titanium
US20110232349A1 (en) * 2003-05-09 2011-09-29 Hebda John J Processing of titanium-aluminum-vanadium alloys and products made thereby
US8499605B2 (en) 2010-07-28 2013-08-06 Ati Properties, Inc. Hot stretch straightening of high strength α/β processed titanium
US8652400B2 (en) 2011-06-01 2014-02-18 Ati Properties, Inc. Thermo-mechanical processing of nickel-base alloys
US9050647B2 (en) 2013-03-15 2015-06-09 Ati Properties, Inc. Split-pass open-die forging for hard-to-forge, strain-path sensitive titanium-base and nickel-base alloys
US9192981B2 (en) 2013-03-11 2015-11-24 Ati Properties, Inc. Thermomechanical processing of high strength non-magnetic corrosion resistant material
US9206497B2 (en) 2010-09-15 2015-12-08 Ati Properties, Inc. Methods for processing titanium alloys
US9255316B2 (en) 2010-07-19 2016-02-09 Ati Properties, Inc. Processing of α+β titanium alloys
US9777361B2 (en) 2013-03-15 2017-10-03 Ati Properties Llc Thermomechanical processing of alpha-beta titanium alloys
US9869003B2 (en) 2013-02-26 2018-01-16 Ati Properties Llc Methods for processing alloys
US10094003B2 (en) 2015-01-12 2018-10-09 Ati Properties Llc Titanium alloy
US10435775B2 (en) 2010-09-15 2019-10-08 Ati Properties Llc Processing routes for titanium and titanium alloys
US10502252B2 (en) 2015-11-23 2019-12-10 Ati Properties Llc Processing of alpha-beta titanium alloys
US10513755B2 (en) 2010-09-23 2019-12-24 Ati Properties Llc High strength alpha/beta titanium alloy fasteners and fastener stock
US11111552B2 (en) 2013-11-12 2021-09-07 Ati Properties Llc Methods for processing metal alloys
CN116136006A (zh) * 2021-11-17 2023-05-19 中国石油天然气股份有限公司 一种钛合金、一种钛合金钻杆管材及其制造方法
US12344918B2 (en) 2023-07-12 2025-07-01 Ati Properties Llc Titanium alloys

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2464112A1 (fr) * 1979-08-27 1981-03-06 Commissariat Energie Atomique Procede de fabrication de pieces en alliage a base de titane par metallurgie des poudres

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2304130A (en) * 1937-12-01 1942-12-08 Chemical Marketing Company Inc Process for the conversion of metals into finely divided form
US2897539A (en) * 1957-03-25 1959-08-04 Titanium Metals Corp Disintegrating refractory metals
US2967351A (en) * 1956-12-14 1961-01-10 Kaiser Aluminium Chem Corp Method of making an aluminum base alloy article
US3246982A (en) * 1962-08-16 1966-04-19 Reynolds Metals Co Method of making a solid length of aluminous metal

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031528B (de) * 1952-10-09 1958-06-04 Deutsche Edelstahlwerke Ag Verfahren zur Erzeugung von Metall- oder Metallegierungspulvern
DE1194152B (de) * 1964-03-06 1965-06-03 Bundesrep Deutschland Verfahren zum Dispergieren von unloeslichen Stoffen in Metallschmelzen, insbesondere zur Herstellung dispersionsgehaerteter Gusslegierungen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2304130A (en) * 1937-12-01 1942-12-08 Chemical Marketing Company Inc Process for the conversion of metals into finely divided form
US2967351A (en) * 1956-12-14 1961-01-10 Kaiser Aluminium Chem Corp Method of making an aluminum base alloy article
US2897539A (en) * 1957-03-25 1959-08-04 Titanium Metals Corp Disintegrating refractory metals
US3246982A (en) * 1962-08-16 1966-04-19 Reynolds Metals Co Method of making a solid length of aluminous metal

Cited By (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3622406A (en) * 1968-03-05 1971-11-23 Titanium Metals Corp Dispersoid titanium and titanium-base alloys
US3807995A (en) * 1971-09-07 1974-04-30 C Dohogne Metal composite
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
US4639281A (en) * 1982-02-19 1987-01-27 Mcdonnell Douglas Corporation Advanced titanium composite
EP0192953A1 (en) * 1985-02-15 1986-09-03 General Electric Company Oxysulfide dispersion strengthened titanium alloys
US4810465A (en) * 1985-04-12 1989-03-07 Daido Tokushuko Kabushiki Kaisha Free-cutting Ti alloy
US4906430A (en) * 1988-07-29 1990-03-06 Dynamet Technology Inc. Titanium diboride/titanium alloy metal matrix microcomposite material and process for powder metal cladding
US6117204A (en) * 1997-09-16 2000-09-12 Kabushiki Kaisha Toyota Chuo Kenkyusho Sintered titanium alloy material and process for producing the same
US8048240B2 (en) 2003-05-09 2011-11-01 Ati Properties, Inc. Processing of titanium-aluminum-vanadium alloys and products made thereby
US8597442B2 (en) 2003-05-09 2013-12-03 Ati Properties, Inc. Processing of titanium-aluminum-vanadium alloys and products of made thereby
US20110232349A1 (en) * 2003-05-09 2011-09-29 Hebda John J Processing of titanium-aluminum-vanadium alloys and products made thereby
US9796005B2 (en) 2003-05-09 2017-10-24 Ati Properties Llc Processing of titanium-aluminum-vanadium alloys and products made thereby
US8597443B2 (en) 2003-05-09 2013-12-03 Ati Properties, Inc. Processing of titanium-aluminum-vanadium alloys and products made thereby
US20100307647A1 (en) * 2004-05-21 2010-12-09 Ati Properties, Inc. Metastable Beta-Titanium Alloys and Methods of Processing the Same by Direct Aging
US9523137B2 (en) 2004-05-21 2016-12-20 Ati Properties Llc Metastable β-titanium alloys and methods of processing the same by direct aging
US20110038751A1 (en) * 2004-05-21 2011-02-17 Ati Properties, Inc. Metastable beta-titanium alloys and methods of processing the same by direct aging
US10422027B2 (en) 2004-05-21 2019-09-24 Ati Properties Llc Metastable beta-titanium alloys and methods of processing the same by direct aging
US8623155B2 (en) 2004-05-21 2014-01-07 Ati Properties, Inc. Metastable beta-titanium alloys and methods of processing the same by direct aging
US8568540B2 (en) 2004-05-21 2013-10-29 Ati Properties, Inc. Metastable beta-titanium alloys and methods of processing the same by direct aging
US20070079908A1 (en) * 2005-10-06 2007-04-12 International Titanium Powder, Llc Titanium boride
US8821611B2 (en) 2005-10-06 2014-09-02 Cristal Metals Inc. Titanium boride
US7879286B2 (en) 2006-06-07 2011-02-01 Miracle Daniel B Method of producing high strength, high stiffness and high ductility titanium alloys
US20070286761A1 (en) * 2006-06-07 2007-12-13 Miracle Daniel B Method of producing high strength, high stiffness and high ductility titanium alloys
US10053758B2 (en) 2010-01-22 2018-08-21 Ati Properties Llc Production of high strength titanium
US20110180188A1 (en) * 2010-01-22 2011-07-28 Ati Properties, Inc. Production of high strength titanium
US9255316B2 (en) 2010-07-19 2016-02-09 Ati Properties, Inc. Processing of α+β titanium alloys
US9765420B2 (en) 2010-07-19 2017-09-19 Ati Properties Llc Processing of α/β titanium alloys
US10144999B2 (en) 2010-07-19 2018-12-04 Ati Properties Llc Processing of alpha/beta titanium alloys
US8834653B2 (en) 2010-07-28 2014-09-16 Ati Properties, Inc. Hot stretch straightening of high strength age hardened metallic form and straightened age hardened metallic form
US8499605B2 (en) 2010-07-28 2013-08-06 Ati Properties, Inc. Hot stretch straightening of high strength α/β processed titanium
US9206497B2 (en) 2010-09-15 2015-12-08 Ati Properties, Inc. Methods for processing titanium alloys
US10435775B2 (en) 2010-09-15 2019-10-08 Ati Properties Llc Processing routes for titanium and titanium alloys
US9624567B2 (en) 2010-09-15 2017-04-18 Ati Properties Llc Methods for processing titanium alloys
US10513755B2 (en) 2010-09-23 2019-12-24 Ati Properties Llc High strength alpha/beta titanium alloy fasteners and fastener stock
US10287655B2 (en) 2011-06-01 2019-05-14 Ati Properties Llc Nickel-base alloy and articles
US9616480B2 (en) 2011-06-01 2017-04-11 Ati Properties Llc Thermo-mechanical processing of nickel-base alloys
US8652400B2 (en) 2011-06-01 2014-02-18 Ati Properties, Inc. Thermo-mechanical processing of nickel-base alloys
US10570469B2 (en) 2013-02-26 2020-02-25 Ati Properties Llc Methods for processing alloys
US9869003B2 (en) 2013-02-26 2018-01-16 Ati Properties Llc Methods for processing alloys
US10337093B2 (en) 2013-03-11 2019-07-02 Ati Properties Llc Non-magnetic alloy forgings
US9192981B2 (en) 2013-03-11 2015-11-24 Ati Properties, Inc. Thermomechanical processing of high strength non-magnetic corrosion resistant material
US9777361B2 (en) 2013-03-15 2017-10-03 Ati Properties Llc Thermomechanical processing of alpha-beta titanium alloys
US10370751B2 (en) 2013-03-15 2019-08-06 Ati Properties Llc Thermomechanical processing of alpha-beta titanium alloys
US9050647B2 (en) 2013-03-15 2015-06-09 Ati Properties, Inc. Split-pass open-die forging for hard-to-forge, strain-path sensitive titanium-base and nickel-base alloys
US11111552B2 (en) 2013-11-12 2021-09-07 Ati Properties Llc Methods for processing metal alloys
US10808298B2 (en) 2015-01-12 2020-10-20 Ati Properties Llc Titanium alloy
US10619226B2 (en) 2015-01-12 2020-04-14 Ati Properties Llc Titanium alloy
US10094003B2 (en) 2015-01-12 2018-10-09 Ati Properties Llc Titanium alloy
US11319616B2 (en) 2015-01-12 2022-05-03 Ati Properties Llc Titanium alloy
US11851734B2 (en) 2015-01-12 2023-12-26 Ati Properties Llc Titanium alloy
US12168817B2 (en) 2015-01-12 2024-12-17 Ati Properties Llc Titanium alloy
US10502252B2 (en) 2015-11-23 2019-12-10 Ati Properties Llc Processing of alpha-beta titanium alloys
CN116136006A (zh) * 2021-11-17 2023-05-19 中国石油天然气股份有限公司 一种钛合金、一种钛合金钻杆管材及其制造方法
US12344918B2 (en) 2023-07-12 2025-07-01 Ati Properties Llc Titanium alloys

Also Published As

Publication number Publication date
DE1558460B1 (de) 1971-12-02
BE699665A (da) 1967-11-16
GB1124435A (en) 1968-08-21

Similar Documents

Publication Publication Date Title
US3379522A (en) Dispersoid titanium and titaniumbase alloys
US3591362A (en) Composite metal powder
US3723092A (en) Composite metal powder and production thereof
US3740210A (en) Mechanically alloyed aluminum aluminum oxide
US3728088A (en) Superalloys by powder metallurgy
US3660049A (en) Dispersion strengthened electrical heating alloys by powder metallurgy
US3655458A (en) Process for making nickel-based superalloys
US4832741A (en) Powder-metallurgical process for the production of a green pressed article of high strength and of low relative density from a heat-resistant aluminum alloy
US3622406A (en) Dispersoid titanium and titanium-base alloys
US4579587A (en) Method for producing high strength metal-ceramic composition
US3809545A (en) Superalloys by powder metallurgy
US3462248A (en) Metallurgy
US3158473A (en) Method for producing composite bodies
US2966731A (en) Aluminum base alloy powder product
US2966736A (en) Aluminum base alloy powder product
US4787943A (en) Dispersion strengthened aluminum-base alloy
US2917383A (en) Fabrication of uranium-aluminum alloys
US4676830A (en) High strength material produced by consolidation of rapidly solidified aluminum alloy particulates
US4728359A (en) Method of producing a dispersion-hardened metal alloy
US3322512A (en) Beryllium-aluminum-silver composite
US3737300A (en) Dispersion strengthened titanium alloys
US3615381A (en) Process for producing dispersion-hardened superalloys by internal oxidation
US3196007A (en) Beryllium copper composition and method of producing green compacts and sintered articles therefrom
US3166417A (en) Platinum-group metal sheet
US3070436A (en) Method of manufacture of homogeneous compositions