Journal
THEORETICAL AND APPLIED FRACTURE MECHANICS
Volume 52, Issue 1, Pages 22-25Publisher
ELSEVIER
DOI: 10.1016/j.tafmec.2009.06.005
Keywords
Microstructure; Plastic deformation; Hardness; Micro-hardness; Thermal cycles; Surface
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it was found that under the thermal cycle loading two interrelated process take place. In the material inner layers redistribution of dislocation and formation of sufficiently stable structure with the less dislocation density take place. Thus, the level of micro-stresses in the metal on the specimens surface and micro-hardness increases, which results in the elasticity exhaustion decrease of the metal micro-plastic deformation resistance. Localization of the micro-plastic deformations causes accumulation of the damage and initiation of microcracks. (C) 2009 Published by Elsevier Ltd.
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