Dependence of Deviation Angle from ∑3(111) Relation on Intergranular Fatigue Cracking in Copper Bicrystals

DOI

説明

In order to investigate the occurrence of the intergranular cracking, the fatigue crack propagatin tests have been carried out on copper bicrystal specimens in which the constituent crystals have several orientation relationships close to Σ3(111) coherent twin boundary. It was found that fatigue crack growth behavior depended significantly on the deviation angle from the Σ3(111) relation. In the specimens having the deviation angles less than 3°, no any intergranular crack growths were observed. When the deviation angle increased up to abount 5°, the fatigue cracks often propagated along the GBs. However at the deviation angles more than 9°, the intragranular cracking became predominant again. Such intragranular cracks propagated along well-developed slip bands. This deviation-angle dependence of the intergranular cracking could be understood in terms of the changes in both the grain boundary character and the development of the slip bands within the constituent grains.

収録刊行物

詳細情報 詳細情報について

問題の指摘

ページトップへ