Effects of specimen geometry on temperature rise and flow behavior of aluminium alloys in hot torsion testing

摘要

Inappropriate design of the test specimen in hot torsion testing may lead to a high accumulation of heat in the central region of the specimen gauge length and as a result flow localization may occur. To avoid this, knowledge of the variation of temperature rise due to plastic deformation over the specimen gauge length for different specimen geometries is necessary. It is also necessary to estimate the distribution of temperature rise in the event that heat generation is inevitable so that the constitutive equations used are modified accordingly. This paper is devoted to these points.