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Additional resources for Adiabatic shear localization : occurrence, theories and applications
Pursche  and Pursche and Meyer  examined different quenched and tempered steels with different heat-treatment conditions with a hardness range between 300 and 600 HB. The propensity of adiabatic shear failure of the materials was determined with the bi-axial dynamic compression/shear test. 24). Under static loading, both tempering conditions can be deformed to the prescribed deformation limit without failure. When dynamic loading occurs, the harder material condition failed suddenly through adiabatic shear failure.
0 In a bar under torsional loading, a gradient of stress and strain exists from the centre of the bar to the outer surface. To reduce this gradient, hollow tubular specimens are commonly used. The specimen should not be too slender otherwise it might buckle. The thin-walled tubular torsion specimen is a good way to test the shear formability of materials [6À10]. In torsion loading, a simple shear state exists. In a thin-walled tube, a homogeneous state of shear deformation along the gauge length and nearly across the wall thickness is present.
Marchand and Duffy  determined the shear-stressÀshear-strain behaviour of a HY100 steel with a torsional Kolsky bar. The same specimen geometry was used by Hwang et al. . They measured the local temperature on the surface and determined the strain distribution during the shearing process, and, respectively, the shear band formation process. Similar investigations with the same test procedure and specimen were done on AISI 4340 steel by Mgbokwere et al. . With this type of torsion specimen, Duffy and Chi  and Lee and Lin  investigated the dynamic torsion behaviour of TiÀ6AlÀ4V in unaged and overaged (formation of precipitations) conditions, each with two different initial microstructures.