Effect of tungsten dissolution on the mechanical properties of Ti-W composites

Heeman Choe; Susan M. Abkowitz; Stanley Abkowitz; David C. Dunand

doi:10.1016/j.jallcom.2004.08.021

Effect of tungsten dissolution on the mechanical properties of Ti-W composites

Heeman Choe, Susan M. Abkowitz, Stanley Abkowitz, David C. Dunand^*

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

38 Scopus citations

Abstract

Blends of 90 wt.% Ti and 10 wt.% W powders were consolidated by powder metallurgy, using an initial W powder size that was very fine (0.7 and 2 μm) or very coarse (<250 μm). Dissolution of W powders in the Ti matrix during consolidation was almost complete for the former blends (thus forming Ti-10W "alloys") but very limited for the latter blend (thus forming a Ti-10W "composite"). The Ti-10W alloys exhibit much higher yield and tensile strengths than the Ti-10W composite, indicating that tungsten strengthens titanium more efficiently as a solute atom (solid-solution strengthening) than as a second phase (composite strengthening by load transfer). The Ti-10W alloys also exhibit much higher ductility than the Ti-10W composite, whose brittle W particles exhibit fracture or pull-out from the matrix.

Original language	English (US)
Pages (from-to)	62-66
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	390
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2004.08.021
State	Published - Mar 22 2005

Keywords

Composite materials
Dental alloys
Mechanical properties
Metallography
Powder metallurgy

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2004.08.021

Cite this

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title = "Effect of tungsten dissolution on the mechanical properties of Ti-W composites",

abstract = "Blends of 90 wt.% Ti and 10 wt.% W powders were consolidated by powder metallurgy, using an initial W powder size that was very fine (0.7 and 2 μm) or very coarse (<250 μm). Dissolution of W powders in the Ti matrix during consolidation was almost complete for the former blends (thus forming Ti-10W {"}alloys{"}) but very limited for the latter blend (thus forming a Ti-10W {"}composite{"}). The Ti-10W alloys exhibit much higher yield and tensile strengths than the Ti-10W composite, indicating that tungsten strengthens titanium more efficiently as a solute atom (solid-solution strengthening) than as a second phase (composite strengthening by load transfer). The Ti-10W alloys also exhibit much higher ductility than the Ti-10W composite, whose brittle W particles exhibit fracture or pull-out from the matrix.",

keywords = "Composite materials, Dental alloys, Mechanical properties, Metallography, Powder metallurgy",

author = "Heeman Choe and Abkowitz, {Susan M.} and Stanley Abkowitz and Dunand, {David C.}",

note = "Funding Information: This research was supported by NIH through a SBIR grant to Dynamet Technology Inc. (Grant No. 2R44EB001005-02).",

year = "2005",

month = mar,

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doi = "10.1016/j.jallcom.2004.08.021",

language = "English (US)",

volume = "390",

pages = "62--66",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

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T1 - Effect of tungsten dissolution on the mechanical properties of Ti-W composites

AU - Choe, Heeman

AU - Abkowitz, Susan M.

AU - Abkowitz, Stanley

AU - Dunand, David C.

N1 - Funding Information: This research was supported by NIH through a SBIR grant to Dynamet Technology Inc. (Grant No. 2R44EB001005-02).

PY - 2005/3/22

Y1 - 2005/3/22

N2 - Blends of 90 wt.% Ti and 10 wt.% W powders were consolidated by powder metallurgy, using an initial W powder size that was very fine (0.7 and 2 μm) or very coarse (<250 μm). Dissolution of W powders in the Ti matrix during consolidation was almost complete for the former blends (thus forming Ti-10W "alloys") but very limited for the latter blend (thus forming a Ti-10W "composite"). The Ti-10W alloys exhibit much higher yield and tensile strengths than the Ti-10W composite, indicating that tungsten strengthens titanium more efficiently as a solute atom (solid-solution strengthening) than as a second phase (composite strengthening by load transfer). The Ti-10W alloys also exhibit much higher ductility than the Ti-10W composite, whose brittle W particles exhibit fracture or pull-out from the matrix.

AB - Blends of 90 wt.% Ti and 10 wt.% W powders were consolidated by powder metallurgy, using an initial W powder size that was very fine (0.7 and 2 μm) or very coarse (<250 μm). Dissolution of W powders in the Ti matrix during consolidation was almost complete for the former blends (thus forming Ti-10W "alloys") but very limited for the latter blend (thus forming a Ti-10W "composite"). The Ti-10W alloys exhibit much higher yield and tensile strengths than the Ti-10W composite, indicating that tungsten strengthens titanium more efficiently as a solute atom (solid-solution strengthening) than as a second phase (composite strengthening by load transfer). The Ti-10W alloys also exhibit much higher ductility than the Ti-10W composite, whose brittle W particles exhibit fracture or pull-out from the matrix.

KW - Composite materials

KW - Dental alloys

KW - Mechanical properties

KW - Metallography

KW - Powder metallurgy

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U2 - 10.1016/j.jallcom.2004.08.021

DO - 10.1016/j.jallcom.2004.08.021

M3 - Article

AN - SCOPUS:13444293151

SN - 0925-8388

VL - 390

SP - 62

EP - 66

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Effect of tungsten dissolution on the mechanical properties of Ti-W composites

Abstract

Keywords

ASJC Scopus subject areas

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