Visualization of trapped hydrogen along grain boundaries and its quantitative contribution to hydrogen-induced intergranular fracture in pure nickel

被引：25
作者：
Wada, Kentaro [1 ,2 ]
Yamabe, Junichiro [2 ,3 ]
Matsunaga, Hisao [2 ,4 ,5 ,6 ]
机构：
[1] Kyushu Univ, Grad Sch Engn, Nishi Ku, 744 Moto Oka, Fukuoka 8190395, Japan
[2] Kyushu Univ, Natl Inst Adv Ind Sci & Technol AIST, Hydrogen Mat Lab HydoMate, AIST,Nishi Ku, 744 Moto Oka, Fukuoka 8190395, Japan
[3] Fukuoka Univ, Dept Mech Engn, Jonan Ku, 8-19-1 Nanakuma, Fukuoka 8140180, Japan
[4] Kyushu Univ, Dept Mech Engn, Nishi Ku, 744 Moto Oka, Fukuoka 8190395, Japan
[5] Kyushu Univ, Res Ctr Hydrogen Ind Use & Storage HYDROGENIUS, Nishi Ku, 744 Moto Oka, Fukuoka 8190395, Japan
[6] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, 744 Moto Oka, Fukuoka 8190395, Japan
来源：
MATERIALIA | 2019年 / 8卷
关键词：
Nickel; Hydrogen embrittlement; Secondary ion mass spectroscopy (SIMS); Grain boundary segregation; Tension test; Thermal desorption analysis (TDA); AUSTENITIC STAINLESS-STEEL; VACANCY FORMATION ENERGIES; SOLUTE SEGREGATION; DISLOCATION LINE; HIGH-RESISTANCE; SULFUR; 1ST-PRINCIPLES; EMBRITTLEMENT; DEUTERIUM; GAS;
D O I：
10.1016/j.mtla.2019.100478
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 approximate to 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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页数：5
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