Thermo-mechanical aspects of adiabatic shear failure of AM50 and Ti6Al4V alloys

被引：158

作者：

Rittel, D. ^{[1
]}

Wang, Z. G. ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Fac Mech Engn, IL-32000 Haifa, Israel

来源：

MECHANICS OF MATERIALS | 2008年 / 40卷 / 08期

基金：

以色列科学基金会;

关键词：

Mg AM50; Ti6Al4V; adiabatic shear band; IR detectors; Hopkinson bar;

D O I：

10.1016/j.mechmat.2008.03.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The thermo-mechanical aspects of adiabatic shear band (ASB) formation are studied for two commercial alloys: Mg AM50 and Ti6Al4V. Tests are carried out on shear compression specimens (SCS). The evolution of the temperature in the deforming gauge section is monitored in real-time, using an array of high-speed infrared detectors synchronized with a Kolsky apparatus (split Hopkinson pressure bar). The evolution of the gage temperature is found to comprise three basic stages, in agreement with Marchand and Duffy's simultaneous observations of mechanical data and gauge deformation patterns (1988). The onset and full formation stages of ASB are identified by combining the collected thermal and mechanical data. Full development of the ASB is identified as the point at which the measured and calculated temperature curves intersect and diverge thereon. At that stage, the homogeneous strain assumption used in calculating the maximum temperature rise is no longer valid. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：629 / 635

页数：7

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