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High-strength discontinuously-reinforced titanium matrix composites and method for manufacturing the same

Inactive Publication Date: 2009-02-12
ADVANCED MATERIALS PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0019]It is therefore, an object of the invention is to produce a fully-dense, essentially uniform structure of flat and shaped titanium metal matrix composite consisting of high-strength and ductile matrix with uniformly distributed re-enforcing particles providing improved mechanical characteristics such as toughness, flexure strength, impact strength, elastic modulus, and wear resistance.

Problems solved by technology

While the use of a number of manufacturing processes including sintering and hot deformation has previously been contemplated in the titanium matrix composite industry, as mentioned above, the processing limitations related to an ability to manufacture a near full density composite structure by low cost room-temperature consolidation, limited process stability, inability to manufacture the components with controlled sizes when components with close tolerances are being produced, high production costs, defective microstructure, residual porosity, and insufficient mechanical properties of not fully dense TMMC articles, established a need for development of the new low cost manufacturing processes for producing the TMMC with optimized mechanical properties and improved performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0057]A TiB2— and SiC-reinforced titanium composite material based on the Ti-6Al-4V alloy matrix was manufactured by (a) preparing a basic powder blend containing titanium powder and having a particle size ≦200 mesh (≦74 microns) for 95% of the powder, 5% of graphite, 2.5% of dispersing SiC powder, 7.5% of dispersing TiB2 particles, and 2.5% of dispersing powders of AlTi2Si3, (Ti,V)(B,C), and TiVB4 complex intermetallic particles partially soluble in the matrix at 1500-2300° F., (b) making a powder of Al—V master alloy having a particle size of 10 μm and less, (c) co-attrition of 30% of this master alloy powder with reinforcing powders, (d) mixing the basic powder blend with the master alloy powder and reinforcing particles at the weight ratio between titanium powder and master alloy of 9:1 to obtain a chemical composition of titanium matrix composite material, (e) compacting the powder mixture at room temperature by cold isostatic pressing, (f) sintering at 2300° F., (g) forging at...

example 2

[0059]A carbide-reinforced titanium composite material based on the Ti-6Al-4V alloy matrix was manufactured by (a) preparing a basic powder blend containing titanium powder having a particle size ≦140 mesh (≦100 μm) for 95% of the powder, 2% of graphite, 15% of dispersing SiC powder, and 4% of dispersing AlV2C, Ti2AlC, and V2C particles partially soluble in the matrix at 1500-2300° F., (b) making a powder of Al—V master alloy having a particle size of 10 μm and less, (c) mixing the basic powder blend with the master alloy powder, in the ratio of 9:1 to obtain a chemical composition of titanium matrix composite material, (d) compacting the powder mixture at room temperature by die-pressing, (e) sintering at 2350° F., (f) forging at 1600° F., and (g) cooling.

[0060]Sintered semi-product had a density of 99% with closed discontinuous porosity that allowed it to carry out forging in open air without encapsulating (or encasing). The resulting carbide-reinforced Ti-6Al-4V matrix composite ...

example 3

[0061]The titanium matrix composite was manufactured using the same raw materials for Ti-6Al-4V matrix alloy and carbide reinforcements, and the same mode of sintering as in Example 1. The final hot deformation was made by hot rolling at 1650° F. instead of forging.

[0062]The resulting TiC / Ti-6Al-4V composite material also had 100% density, and exhibited satisfied yield strength at room temperature and at 930° F. (500° C.).

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Abstract

The invention relates to manufacturing the flat or shaped titanium matrix composite articles having improved mechanical properties such as lightweight plates, sheets for aircraft and automotive applications, heat-sinking lightweight electronic substrates, armor plates, etc. High-strength discontinuously-reinforced titanium metal matrix composite (TMMC) comprises (a) titanium matrix or titanium alloy as a major component, (b) ceramic and / or ≦50 vol. % intermetallic hard particles dispersed in matrix, (c) complex carbide- and / or boride particles at least partially soluble in matrix at sintering or forging temperatures such as ≦50 vol. % AlV2C, AlTi2Si3, AlTi6Si3, VB2, TiVSi2, TiVB4, Ti2AlC, AlCr2C, TiAlV2, V2C, VSi2, Ta3B4, NbTiB4, Al3U2C3 dispersed in matrix. Method for manufacturing these TMMC materials is disclosed. Sintered TMMC density exceeds 98% and closed discontinuous porosity allows performing hot deformation in air without encapsulating. Near-full density near-net shape TMMC parts with acceptable mechanical properties were manufactured without hot deformation.

Description

REFERENCED CITED[0001]U.S. Patent Documents4,499,156February 1985Smith, et al.428 / 6144,906,930March 1990Abkowitz, et al.428 / 4694,917,858April 1990Eylon, et al.419 / 28 4,968,348November 1990Abkowitz, et al. 75 / 2444,987,033January 1991Abkowitz, et al.428 / 4695,336,291August 1994Nukami, et al.  75 / 10.185,366,570April 1997Mazur, et al.148 / 6695,429,877July 1995Eylon428 / 5865,458,705October 1995Mazur, et al.148 / 6695,534,353July 1996Kaba, et al.428 / 4695,580,403December 1996Mazur, et al.148 / 4075,624,505April 1997Mazur, et al.148 / 4075,722,037February 1998Chung, et al.419 / 45 5,797,239August 1998Zaccone, et al.420 / 4175,897,830April 1999Abkowitz, et al.420 / 4176,029,269February 2000El-Soudani  2 / 2.5OTHER PUBLICATIONS[0002]Metal Handbook, 9th Edition, v.7, American Society for Metals, Materials Park, Ohio, 1993.[0003]“Powder Metallurgy of Titanium Alloys” F. H. Froes and D. Eylon, International Material Reviews, 1990, vol. 35, No. 3, p. 162-182.[0004]Primary Examiner—[0005]Assistant Examiner—[0006]A...

Claims

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Application Information

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IPC IPC(8): C22C32/00B22F3/12
CPCC22C32/0047B22F2999/00B22F2998/10B22F2003/185C22C1/1084B22F2003/175C22C1/1005B22F3/02B22F3/10B22F3/24B22F3/15B22F3/17B22F3/18
Inventor DUZ, VOLODYMYR A.MOXSON, VLADIMIR S.SHAPIRO, ALEXANDER E.
Owner ADVANCED MATERIALS PRODS
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