Constitutive Analysis to Predict High-Temperature Flow Stress of 25vol% B4Cp/2009Al Composite

被引：1

作者：

Liu Shengpu ^{[1
]}

Li Defu ^{[1
]}

He Jinyu ^{[1
]}

Guo Shengli ^{[1
]}

机构：

[1] Gen Res Inst Nonferrous Met, Beijing 100088, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2017年 / 46卷 / 10期

基金：

中国国家自然科学基金;

关键词：

B4Cp/2009Al composite; hot deformation behavior; constitutive equation; flow stress prediction; HOT-DEFORMATION-BEHAVIOR; MATRIX COMPOSITES; B4C; ALLOY; MICROSTRUCTURE; WORKABILITY; INTERFACE; MECHANISM; SIZE; SICP;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Isothermal compression tests of 25vol% B4Cp/2009Al composite have been carried out at temperatures ranging from 300 degrees C to 500 degrees C and strain rates ranging from 0.001 s(-1) to 1 s(-)(1). The results show that high-temperature flow stress of the composite decreases with the increase of deformation temperature and the decrease of strain rate. The flow stress has been corrected by friction and the friction corrected stress is lower than experimental values. The influence of friction becomes more obvious with decreasing temperature and increasing strain rate. Then a constitutive equation considering the effect of strain on material constants (i.e. a, n, Q and A) is developed on the basis of Arrhenius type equation. Compared with the experimental results, the flow stress calculated by the constitutive equation possesses a high precision with the correlation coefficient of 0.992. Higher temperature and lower strain rate is beneficial to hot deformation of B4Cp/2009Al composite.

引用

页码：2831 / 2836

页数：6

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