Temperature Effects on Deformation and Serration Behavior of High-Entropy Alloys (HEAs)

被引：82

作者：

Antonaglia, J. ^{[1
]}

Xie, X. ^{[2
]}

Tang, Z. ^{[2
]}

Tsai, C. -W. ^{[3
]}

Qiao, J. W. ^{[4
]}

Zhang, Y. ^{[5
]}

Laktionova, M. O. ^{[6
]}

Tabachnikova, E. D. ^{[6
]}

Yeh, J. W. ^{[3
]}

Senkov, O. N. ^{[7
]}

Gao, M. C. ^{[8
,9
]}

Uhl, J. T.

Liaw, P. K. ^{[2
]}

Dahmen, K. A. ^{[1
]}

机构：

[1] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[3] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 30013, Taiwan

[4] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China

[5] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

[6] Natl Acad Sci Ukraine, BI Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine

[7] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA

[8] Natl Energy Technol Lab, Albany, OR 97321 USA

[9] USR Corp, Albany, OR 97321 USA

来源：

JOM | 2014年 / 66卷 / 10期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

PRINCIPAL-ELEMENT ALLOYS; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; STRAIN-RATE; CORROSION-RESISTANCE; ACTIVATION-ENERGY; PHASE-COMPOSITION; SOLID-SOLUTION; LOW-DENSITY; FLOW;

D O I：

10.1007/s11837-014-1130-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Many materials are known to deform under shear in an intermittent way with slip avalanches detected as acoustic emission and serrations in the stress-strain curves. Similar serrations have recently been observed in a new class of materials, called high-entropy alloys (HEAs). Here, we discuss the serration behaviors of several HEAs from cryogenic to elevated temperatures. The experimental results of slow compression and tension tests are compared with the predictions of a slip-avalanche model for the deformation of a broad range of solids. The results shed light on the deformation processes in HEAs. Temperature effects on the distributions of stress drops and the decrease of the cutoff (i.e., of the largest observed slip size) for increasing temperature qualitatively agree with the model predictions. The model is used to quantify the serration characteristics of HEAs, and pertinent implications are discussed.

引用

页码：2002 / 2008

页数：7

共 59 条

[1] Tuned Critical Avalanche Scaling in Bulk Metallic Glasses [J].