Crystallographic Analysis of Hydrogen Embrittlement Behavior in Aluminum Alloy Using Diffraction Contrast Tomography

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

Research output: Contribution to journalArticlepeer-review

Abstract

Crystallographic assessment of the hydrogen embrittlement behavior of AlZnMg 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.

Original languageEnglish
Pages (from-to)586-591
Number of pages6
JournalMaterials Transactions
Volume63
Issue number4
DOIs
Publication statusPublished - 2022

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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