A Modified Johnson-Cook Model for Flow Behavior of Alloy 800H at Intermediate Strain Rates and High Temperatures

被引：22
|
作者：
Shokry, Abdallah [1 ]
机构：
[1] Fayoum Univ, Mech Engn, Fac Engn, Al Fayyum 63514, Egypt
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2017年 / 26卷 / 12期
关键词：
alloy; 800H; high temperatures; intermediate strain rates; Johnson-Cook model; Kalman filter; CONSTITUTIVE MODEL; MICROSTRUCTURAL EVOLUTION; DYNAMIC-BEHAVIOR; HOT DEFORMATION; INCONEL; 718; PARAMETERS; IDENTIFICATION;
D O I：
10.1007/s11665-017-3076-x
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A modified Johnson-Cook model for the flow behavior of alloy 800H at intermediate strain rates and high temperatures is presented. The modification is based on a study of the relation between strain hardening and both strain rate and softening parameters. The predicted stresses obtained using the modified model are compared to those obtained using the original Johnson-Cook model. The parameters constitute the two models are determined using the inverse method, Kalman filter. The results show that the modified model fits the experimental data very well for different combinations of strain rates and temperatures, with a mean value of R-squared regression of 0.90 for the modified model and 0.74 for the original Johnson-Cook model.
引用
收藏
页码：5723 / 5730
页数：8
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