材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
アルミニウムの疲労き裂先端の塑性ひずみ分布
北川 茂
著者情報
ジャーナル フリー

1974 年 23 巻 244 号 p. 64-68

詳細
抄録

In order to clarify the mechanism of fatigue crack propagation, the plastically deformed zones at the crack tips were measured by means of two microbeam X-ray diffraction techniques: The transmission Laue method and the back reflection Debye-Scherrer method. The material used was annealed, extremely pure aluminum of 99.999%, and the specimens were subjected to cyclic tension and compression loads. The distribution of maximum shear stress, τmax, around the crack tip was estimated by Sneddon's formula. It was found that the plastically deformed zones appear in accord with the τmax distribution; that is, the minimum deformed region exists at the front of the crack tip and the maximum one appears in the direction 40°∼50° off from the crack propagating direction. I was also clarified that the total misorientation of the grain near the crack tip inside of the specimen is slightly larger than that on the surface.

著者関連情報
© 日本材料学会
前の記事 次の記事
feedback
Top