著者

Kyosuke Hirayama Hiroyuki Toda Takafumi Suzuki Masayuki Uesugi Akihisa Takeuchi Wolfgang Ludwig

出版者

The Japan Institute of Metals and Materials

雑誌

MATERIALS TRANSACTIONS (ISSN:13459678)

巻号頁・発行日

vol.63, no.4, pp.586-591, 2022-04-01 (Released:2022-03-25)

参考文献数

26

被引用文献数

1

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Crystallographic assessment of the hydrogen embrittlement behavior of Al–Zn–Mg alloy was performed by means of a technique combining fracture trajectory analysis and synchrotron X-ray diffraction contrast tomography. The 3D microstructure reconstructed using diffraction contrast tomography contained 119 grains. Fracture surfaces revealing intergranular fracture, ductile fracture, and quasi-cleavage fracture were observed in the alloy. While the intergranular crack initiated at a grain boundary with high grain boundary energy and a high angle between the grain boundary plane and loading direction, the crack propagation itself was not observed to be sensitive to these two parameters. The quasi-cleavage fracture surfaces were not characterized by any specific crystal orientation because of variation in the free surface segregation energy of hydrogen uniforms without depending on surface orientation.