High-pressure strengths of Ni3Al and Ni-Al-Cr

被引：11

作者：

Raju, S. V. ^{[1
]}

Godwal, B. K. ^{[2
]}

Singh, A. K. ^{[3
]}

Jeanloz, R. ^{[2
,4
,5
]}

Saxena, S. K. ^{[1
]}

机构：

[1] Florida Int Univ, CeSMEC, Dept Mech Engg, Miami, FL 33199 USA

[2] Univ Calif Berkeley, Earth & Planetary Sci, Berkeley, CA 94720 USA

[3] Natl Aeronaut Lab, Mat Sci Div, Bangalore, Karnataka, India

[4] Univ Calif Berkeley, Miller Inst Basic Res Sci, Berkeley, CA 94720 USA

[5] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 741卷

基金：

美国国家科学基金会;

关键词：

Nickel - aluminum alloys; Elasticity; Mechanical properties; Strain; High pressure; X-ray diffraction; YIELD STRENGTH; LATTICE STRAINS; SUPERALLOY; SYSTEM; 1ST-PRINCIPLES; SCALE;

D O I：

10.1016/j.jallcom.2018.01.142

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

High-pressure x-ray diffraction on Ni3Al, non-hydrostatically compressed at room temperature to 30 GPa in radial geometry can be interpreted in terms of a hydrostatic pressure-volume equation of state. We found the yield strength of Ni3Al to increase from about 0.2 to 2 GPa as pressure increases from 0 to 30 GPa. Yield-strength values determined from x-ray diffraction in axial geometry by including a Poisson ratio effect and pressure gradient methods are in good accord with each other. Our results indicate that the strengths of both pure and Cr-doped (7 at. %) Ni3Al increase with pressure, with the yield strength of Ni3Al slightly higher than Ni-Al-Cr alloy. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：642 / 647

页数：6

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