A model for microstructure evolution in adiabatic shear bands

被引：149

作者：

Hines, JA ^{[1
]}

Vecchio, KS

Ahzi, S

机构：

[1] Univ Calif San Diego, Dept Appl Mech & Engn Sci, Mat Sci Program, La Jolla, CA 92093 USA

[2] Tech Univ Hamburg Harburg, Dept Met & Mat Technol, D-21073 Hamburg, Germany

[3] Univ Calif San Diego, Dept Appl Mech & Engn Sci, La Jolla, CA 92093 USA

[4] Clemson Univ, Dept Mech Engn, Clemson, SC 29634 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1998年 / 29卷 / 01期

关键词：

D O I：

10.1007/s11661-998-0172-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A mechanical subgrain rotation model is proposed to account for the recrystallized grains which have been observed to form in adiabatic shear bands in a number of materials. The model is based on a "bicrystal" approach using crystal plasticity theory to predict the evolution of subgrain misorientations. These mechanically induced rotations are shown to occur at the high strain rate associated with adiabatic shear band formation. Recrystallized grain formation is proposed to occur by the formation and mechanical rotation of subgrains during deformation, coupled with boundary refinement via diffusion during shear band cooling. This model is referred to as progressive subgrain misorientation recrystallization and appears to account fdr shear band microstructures in a variety of metals.

引用

页码：191 / 203

页数：13

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