Stress relaxation in ultrafine-grained copper at low homologous temperatures
Abstract
The temperature and rate sensitivity of the flow stress in ultrafine-grained (UFG) copper prepared by equal-channel angular hydroextrusion was studied. Tensile tests and stress relaxation tests were carried out in the temperature range of 77 to 295 K. It was established that, with increasing temperature, the flow stress decreases monotonously, and the activation volume reaches a maximum of ∼190b3 at a temperature of ∼(200 ± 20) K. The results of...
Paper Details
Title
Stress relaxation in ultrafine-grained copper at low homologous temperatures
Published Date
Nov 1, 2018
Journal
Volume
44
Issue
11
Pages
1204 - 1210
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