TY - JOUR
T1 - Visualization of trapped hydrogen along grain boundaries and its quantitative contribution to hydrogen-induced intergranular fracture in pure nickel
AU - Wada, Kentaro
AU - Yamabe, Junichiro
AU - Matsunaga, Hisao
N1 - Funding Information:
A part of this study (EBSD analysis) was conducted with support from the Advanced Characterization Platform of the Nanotechnology Platform Japan, sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan. The authors also wish to thank the staff of the Cameca Division – Ametek Co. Ltd. and Kobe Material Testing Laboratory Co. Ltd. for providing technical support and helpful information in relation to the SIMS analysis. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
Funding Information:
A part of this study (EBSD analysis) was conducted with support from the Advanced Characterization Platform of the Nanotechnology Platform Japan, sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan. The authors also wish to thank the staff of the Cameca Division – Ametek Co., Ltd., and Kobe Material Testing Laboratory Co., Ltd., for providing technical support and helpful information in relation to the SIMS analysis.
Publisher Copyright:
© 2019
PY - 2019/12
Y1 - 2019/12
N2 - The phenomenon of hydrogen-trapping and its quantitative contribution to hydrogen-induced intergranular (IG) fracture were studied using a combination of thermal desorption analysis, secondary ion mass spectrometry and slow strain rate tensile tests. Hydrogen was trapped along grain boundaries (GBs) with a binding energy of ≈20 kJ/mol, accompanied by IG sulfur. The true fracture stress and fracture surface morphology were strongly dependent on the concentration of trapped hydrogen, leading to the conclusion that the hydrogen-induced IG fracture of pure Ni is controlled by the concentration of hydrogen trapped along GBs, and not by the concentration of lattice hydrogen.
AB - The phenomenon of hydrogen-trapping and its quantitative contribution to hydrogen-induced intergranular (IG) fracture were studied using a combination of thermal desorption analysis, secondary ion mass spectrometry and slow strain rate tensile tests. Hydrogen was trapped along grain boundaries (GBs) with a binding energy of ≈20 kJ/mol, accompanied by IG sulfur. The true fracture stress and fracture surface morphology were strongly dependent on the concentration of trapped hydrogen, leading to the conclusion that the hydrogen-induced IG fracture of pure Ni is controlled by the concentration of hydrogen trapped along GBs, and not by the concentration of lattice hydrogen.
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U2 - 10.1016/j.mtla.2019.100478
DO - 10.1016/j.mtla.2019.100478
M3 - Article
AN - SCOPUS:85072847088
VL - 8
JO - Materialia
JF - Materialia
SN - 2589-1529
M1 - 100478
ER -