A modified Johnson-Cook model for FeCoNiCr high entropy alloy over a wide range of strain rates

被引：41

作者：

Bobbili, Ravindranadh ^{[1
]}

Madhu, Vemuri ^{[1
]}

机构：

[1] Def Met Res Lab, Hyderabad 500058, Andhra Prades, India

来源：

MATERIALS LETTERS | 2018年 / 218卷

关键词：

Metals and alloys; Microstructure; CONSTITUTIVE RELATIONS; MECHANICAL-PROPERTIES; DEFORMATION-BEHAVIOR;

D O I：

10.1016/j.matlet.2018.01.163

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The objective of the study is to perform experiments on FeCoNiCr high entropy alloy under different strain rates ranging from 0.01 to 3500/s and also at temperatures of 25, 200, 400 and 600 degrees C. Considering the effects of work hardening and thermal softening at high strain rates, the flow behavior is characterized by employing the modified Johnson-Cook (J-C) and Zerilli-Armstrong (Z-A) models. The triaxiality data showed the decrease in effective plastic strain at failure as triaxiality increases for all strain rates. Fracture constants have been evaluated. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：103 / 105

页数：3

共 19 条

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