Correcting the Stress-Strain Curve in Hot Compression Process to High Strain Level

被引：108

作者：

Li, Y. P. ^{[1
]}

Onodera, E. ^{[1
]}

Matsumoto, H. ^{[1
]}

Chiba, A. ^{[1
]}

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi, Japan

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2009年 / 40A卷 / 04期

关键词：

DEFORMATION;

D O I：

10.1007/s11661-009-9783-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This article provides a model that regards the evolution behavior of the friction coefficient in the cylindrical compression test as a function of true strain on the basis of experimental results, allowing the effect of friction on the deformation curve at extremely high strain level to be evaluated and corrected for the first time. The compressive tests were carried out at a stroke rate of 1.2 mm/s on IHS38MSV hypoeutectoid steel with various lubricants at temperatures ranging from 800 A degrees C to 1200 A degrees C. The results showed that the friction coefficient for the compressive process was not constant and the variation could be approximated by an exponential equation along with the true strain. Microstructure observation showed that the stress increase in the later stages of process should be closely related to the large increase in the friction coefficient. The corrected curves were found to correlate well with the microstructure observation.

引用

页码：982 / 990

页数：9

共 17 条

[1]

[Anonymous], 1960, International Journal of Mechanical Sciences

[2]

[Anonymous], T ASME D B

[3] FRICTION STRESS AND NORMAL STRESS IN BULK METAL-FORMING PROCESSES [J].