Predicting yield strengths of noble metal high entropy alloys

被引：79

作者：

Varvenne, Celine ^{[1
]}

Curtin, William A. ^{[2
]}

机构：

[1] Aix Marseille Univ, CNRS, Ctr Interdisciplinaire Nanosci Marseille, Campus Luminy,Case 913, F-13288 Marseille, France

[2] Ecole Polytech Fed Lausanne, Lab Multiscale Mech Modeling, CH-1015 Lausanne, Switzerland

来源：

SCRIPTA MATERIALIA | 2018年 / 142卷

基金：

欧洲研究理事会;

关键词：

High entropy alloys; Noble metals; Mechanical properties; Solution strengthening; Yield stress predictions; ATOMISTIC SIMULATIONS; ELASTIC-CONSTANTS; PLATINUM;

D O I：

10.1016/j.scriptamat.2017.08.030

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Recent data on the Noble metal (Pd-Pt-Rh-Ir-Au-Ag-Cu-Ni) high entropy alloys (HEAs) shows some of these materials to have impressive mechanical properties. Here, a mechanistic theory for the temperature-, composition-, and strain-rate-dependence of the initial yield strength of fcc HEA5 is applied to this alloy class, with inputs obtained through "rule-of-mixtures" models for both alloy lattice and elastic constants. Predictions for PdPtRhIrCuNi are in good agreement with available experiment and the model provides useful insights into this system. The model is then used to explore other alloy compositions within this broad class to guide design of new stronger Noble metal HEA5. (C) 2017 Acta Materialia Inc. Published by. Elsevier Ltd. All rights reserved.

引用

页码：92 / 95

页数：4

共 23 条

[1] The Electronic Structure of Platinum-Gold Alloy Particles BETTER CATALYSTS FOR SELECTIVE OXIDATIONS [J].

Bond, Geoffrey C. .

PLATINUM METALS REVIEW, 2007, 51 (02) :63-68

[2] ELASTIC CONSTANTS OF NICKEL-COPPER ALLOY SINGLE CRYSTALS [J].

EPSTEIN, SG ;

CARLSON, ON .

ACTA METALLURGICA, 1965, 13 (05) :487-+

[3] Exceptional damage-tolerance of a medium-entropy alloy CrCoNi at cryogenic temperatures [J].

Gludovatz, Bernd ;

Hohenwarter, Anton ;

Thurston, Keli V. S. ;

Bei, Hongbin ;

Wu, Zhenggang ;

George, Easo P. ;

Ritchie, Robert O. .

NATURE COMMUNICATIONS, 2016, 7

[4] A fracture-resistant high-entropy alloy for cryogenic applications [J].

Gludovatz, Bernd ;

Hohenwarter, Anton ;

Catoor, Dhiraj ;

Chang, Edwin H. ;

George, Easo P. ;

Ritchie, Robert O. .

SCIENCE, 2014, 345 (6201) :1153-1158

[5]

Laplanche G., THERMAL ACTIVA UNPUB

[6] Plastic yielding in nanocrystalline Pd-Au alloys mimics universal behavior of metallic glasses [J].

Leibner, A. ;

Braun, C. ;

Heppe, J. ;

Grewer, M. ;

Birringer, R. .

PHYSICAL REVIEW B, 2015, 91 (17)

[7] First-principles prediction of yield stress for basal slip in Mg-Al alloys [J].

Leyson, G. P. M. ;

Hector, L. G., Jr. ;

Curtin, W. A. .

ACTA MATERIALIA, 2012, 60 (13-14) :5197-5203

[8] Solute strengthening from first principles and application to aluminum alloys [J].

Leyson, G. P. M. ;

Hector, L. G., Jr. ;

Curtin, W. A. .

ACTA MATERIALIA, 2012, 60 (09) :3873-3884

[9] Determining the minimum grain size in severe plastic deformation process via first-principles calculations [J].

Lu, Song ;

Hu, Qing-Miao ;

Delczeg-Czirjak, Erna Krisztina ;

Johansson, Borje ;

Vitos, Levente .

ACTA MATERIALIA, 2012, 60 (11) :4506-4513

[10]

Merker J, 2001, PLATIN MET REV, V45, P74

← 1 2 3 →