Constitutive Modelling of Hot Deformation Behaviour of Mg-0.5wt% Ce Alloy

被引：2

作者：

Deogade, Bhomik Ketari ^{[1
,2
]}

Bibhanshu, Nitish ^{[3
]}

Kalsar, Rajib ^{[3
]}

Acharyya, Swati Ghosh ^{[2
]}

Suresh, K. S. ^{[4
]}

机构：

[1] Mahatma Gandhi Inst Technol, Dept Met & Mat Engn, Hyderabad, India

[2] Univ Hyderabad, Sch Engn Sci & Technol, Hyderabad, India

[3] Indian Inst Sci, Mat Engn, Bangalore, India

[4] Indian Inst Technol Roorkee, Dept Met & Mat Engn, Roorkee 247667, India

来源：

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2023年 / 76卷 / 11期

关键词：

Mg; Ce alloy; Hot deformation; Constitutive equation; Processing map; Deformation mechanism; HIGH-TEMPERATURE DEFORMATION; DYNAMIC RECRYSTALLIZATION; STRAIN-RATE; DUCTILITY; FLOW;

D O I：

10.1007/s12666-023-03022-z

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Ce addition in Mg improves its restricted duc-tility owing to inadequate number of deformation systems being hcp structure. Hot compression conducted on Mg-0.5wt% Ce alloy to identify the suitable deformation regime in processing maps. The flow stress (s) response of such plastic deformation is governed by constitutive equations, established by a physical model on 0.1 to 0.5 true strain (e) depends on hyperbolic-sinusoidal Arrhenius-type equa-tions and also initiated with Zener-Hollomon parameter (Z) as specified by strain rate (E) and deformation temperature. The average absolute relative error (AARE) and correlation coefficient (R) measure the correctness of the developed constitutive equation showing reasonable predictions of the modified flow stress. Processing map shows dynamic recovery (DRV) domain at 673-723 K and 0.001-0.1 s(-1), corresponding to the suitable hot working regime, and also identifies unstable zones of flow stress behaviour.

引用

页码：2953 / 2962

页数：10

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