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

被引：42
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
收藏
页码：103 / 105
页数：3
相关论文
共 19 条
[1]  
[Anonymous], 1994, Dynamic Behavior of Materials, P66
[2]  
Armstrong R.W., 2013, INT MATER REV, V53, P105
[3]   High strain rate tensile behavior of Al-4.8Cu-1.2Mg alloy [J].
Bobbili, Ravindranadh ;
Paman, Ashish ;
Madhu, V. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2016, 651 :753-762
[4]  
De Hosson JTM, 2001, PHILOS MAG A, V81, P1099, DOI 10.1080/01418610110033975
[5]  
Gao M.C., 2016, High-entropy alloys: fundamentals and applications
[6]   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
[7]   FRACTURE CHARACTERISTICS OF 3 METALS SUBJECTED TO VARIOUS STRAINS, STRAIN RATES, TEMPERATURES AND PRESSURES [J].
JOHNSON, GR ;
COOK, WH .
ENGINEERING FRACTURE MECHANICS, 1985, 21 (01) :31-48
[8]  
Johnston G. B., 1983, Proceedings of the 37th annual meeting of the Northeastern Weed Science Society, 1983., P51
[9]   High strain-rate compressive deformation behavior of the Al0.1CrFeCoNi high entropy alloy [J].
Kumar, N. ;
Ying, Q. ;
Nie, X. ;
Mishra, R. S. ;
Tang, Z. ;
Liaw, P. K. ;
Brennan, R. E. ;
Doherty, K. J. ;
Cho, K. C. .
MATERIALS & DESIGN, 2015, 86 :598-602
[10]   High-velocity deformation of Al0.3CoCrFeNi high-entropy alloy: Remarkable resistance to shear failure [J].
Li, Z. ;
Zhao, S. ;
Diao, H. ;
Liaw, P. K. ;
Meyers, M. A. .
SCIENTIFIC REPORTS, 2017, 7
12