TEMPERATURE SENSITIVITY AND PREDICTION OF THE MECHANICAL BEHAVIORS OF ULTRAFINE GRAINED ALUMINUM UNDER UNIAXIAL COMPRESSION

In the present work, we explore the strain hardening behaviors as well as the effect of temperature on the plastic deformation of ultrafine grained aluminum. The temperature sensitivity is determined and compared with that of coarse grained material. The results indicate that the flow stress of ultr...

Full description

Saved in:
Bibliographic Details
Published inActa mechanica solida Sinica Vol. 27; no. 4; pp. 373 - 382
Main Authors Zhan, Quanwei, Suo, Tao, Wang, Cunxian, Xie, Kui, Tang, Zhongbin
Format Journal Article
LanguageEnglish
Published Singapore Elsevier Ltd 01.08.2014
Springer Singapore
Subjects
Classical Mechanics
compressive behavior
constitutive relation
Engineering
strain hardening behavior
Surfaces and Interfaces
temperature sensitivity
Theoretical and Applied Mechanics
Thin Films
ultrafine grained aluminum
力学行为
单轴压缩
变形效果
温度敏感性
温度灵敏度
超细晶
铝合金
预测
strain hardening behavior
constitutive relation
compressive behavior
ultrafine grained aluminum
temperature sensitivity
Online AccessGet full text

Cover

More Information
Summary:In the present work, we explore the strain hardening behaviors as well as the effect of temperature on the plastic deformation of ultrafine grained aluminum. The temperature sensitivity is determined and compared with that of coarse grained material. The results indicate that the flow stress of ultrafine grained aluminum displays enhanced sensitivity to temperature. The reduction in activation volume is suggested to be the major reason for the enhanced temperature sensitivity as grain size is refined into the sub-micrometer regime. Finally, a phenomenological constitutive model is proposed to describe the post-yield response of ultrafine grained aluminum.
Bibliography:ultrafine grained aluminum,compressive behavior,temperature sensitivity,strain hardening behavior,constitutive relation
In the present work, we explore the strain hardening behaviors as well as the effect of temperature on the plastic deformation of ultrafine grained aluminum. The temperature sensitivity is determined and compared with that of coarse grained material. The results indicate that the flow stress of ultrafine grained aluminum displays enhanced sensitivity to temperature. The reduction in activation volume is suggested to be the major reason for the enhanced temperature sensitivity as grain size is refined into the sub-micrometer regime. Finally, a phenomenological constitutive model is proposed to describe the post-yield response of ultrafine grained aluminum.
42-1121/O3
ISSN:0894-9166
1860-2134
DOI:10.1016/S0894-9166(14)60045-8