TY - JOUR
T1 - Temperature sensitivity and prediction of the mechanical behaviors of ultrafine grained aluminum under uniaxial compression
AU - Zhan, Quanwei
AU - Suo, Tao
AU - Wang, Cunxian
AU - Xie, Kui
AU - Tang, Zhongbin
PY - 2014
Y1 - 2014
N2 - 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.
AB - 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.
KW - Compressive behavior
KW - Constitutive relation
KW - Strain hardening behavior
KW - Temperature sensitivity
KW - Ultrafine grained aluminum
UR - http://www.scopus.com/inward/record.url?scp=84925947362&partnerID=8YFLogxK
U2 - 10.1016/S0894-9166(14)60045-8
DO - 10.1016/S0894-9166(14)60045-8
M3 - 文章
AN - SCOPUS:84925947362
SN - 0894-9166
VL - 27
SP - 373
EP - 382
JO - Acta Mechanica Solida Sinica
JF - Acta Mechanica Solida Sinica
IS - 4
ER -