Comparative study of hydrogen-induced intergranular fracture behavior in Ni and Cu–Ni alloy at ambient and cryogenic temperatures

Kentaro Wada, Junichiro Yamabe, Yuhei Ogawa, Osamu Takakuwa, Takashi Iijima, Hisao Matsunaga

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In order to clarify the contribution of dislocation‒hydrogen interaction on the hydrogen embrittlement (HE) of pure Ni and of Cu‒55 wt% Ni binary alloy, slow strain rate tensile (SSRT) tests were conducted at room temperature (RT) and at 77 K on hydrogen-precharged specimens. Regarding the SSRT test at RT, hydrogen increased the flow stress and induced intergranular fracture in both pure Ni and Cu–Ni alloy. Furthermore, based on scanning transmission electron microscopy investigations, it was suggested that the evolution of dislocation structures had been enhanced by hydrogen, but only in the case of pure Ni. At 77 K, the ductility of pure Ni was degraded by hydrogen, whereas that of Cu–Ni alloy was not. The difference in temperature dependence of the dislocation‒hydrogen interaction between pure Ni and Cu–Ni alloy was discussed, based on the previously proposed HE mechanisms.

Original languageEnglish
Article number138349
JournalMaterials Science and Engineering A
Volume766
DOIs
Publication statusPublished - Oct 24 2019

Fingerprint

cryogenic temperature
Cryogenics
ambient temperature
Hydrogen
hydrogen embrittlement
Hydrogen embrittlement
hydrogen
tensile tests
strain rate
Strain rate
Temperature
Binary alloys
room temperature
binary alloys
ductility
Plastic flow
Ductility
interactions
Transmission electron microscopy
temperature dependence

All Science Journal Classification (ASJC) codes

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

Cite this

Comparative study of hydrogen-induced intergranular fracture behavior in Ni and Cu–Ni alloy at ambient and cryogenic temperatures. / Wada, Kentaro; Yamabe, Junichiro; Ogawa, Yuhei; Takakuwa, Osamu; Iijima, Takashi; Matsunaga, Hisao.

In: Materials Science and Engineering A, Vol. 766, 138349, 24.10.2019.

Research output: Contribution to journalArticle

@article{ce0f900273a34045bffd5cd681ce5c86,
title = "Comparative study of hydrogen-induced intergranular fracture behavior in Ni and Cu–Ni alloy at ambient and cryogenic temperatures",
abstract = "In order to clarify the contribution of dislocation‒hydrogen interaction on the hydrogen embrittlement (HE) of pure Ni and of Cu‒55 wt{\%} Ni binary alloy, slow strain rate tensile (SSRT) tests were conducted at room temperature (RT) and at 77 K on hydrogen-precharged specimens. Regarding the SSRT test at RT, hydrogen increased the flow stress and induced intergranular fracture in both pure Ni and Cu–Ni alloy. Furthermore, based on scanning transmission electron microscopy investigations, it was suggested that the evolution of dislocation structures had been enhanced by hydrogen, but only in the case of pure Ni. At 77 K, the ductility of pure Ni was degraded by hydrogen, whereas that of Cu–Ni alloy was not. The difference in temperature dependence of the dislocation‒hydrogen interaction between pure Ni and Cu–Ni alloy was discussed, based on the previously proposed HE mechanisms.",
author = "Kentaro Wada and Junichiro Yamabe and Yuhei Ogawa and Osamu Takakuwa and Takashi Iijima and Hisao Matsunaga",
year = "2019",
month = "10",
day = "24",
doi = "10.1016/j.msea.2019.138349",
language = "English",
volume = "766",
journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",
issn = "0921-5093",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Comparative study of hydrogen-induced intergranular fracture behavior in Ni and Cu–Ni alloy at ambient and cryogenic temperatures

AU - Wada, Kentaro

AU - Yamabe, Junichiro

AU - Ogawa, Yuhei

AU - Takakuwa, Osamu

AU - Iijima, Takashi

AU - Matsunaga, Hisao

PY - 2019/10/24

Y1 - 2019/10/24

N2 - In order to clarify the contribution of dislocation‒hydrogen interaction on the hydrogen embrittlement (HE) of pure Ni and of Cu‒55 wt% Ni binary alloy, slow strain rate tensile (SSRT) tests were conducted at room temperature (RT) and at 77 K on hydrogen-precharged specimens. Regarding the SSRT test at RT, hydrogen increased the flow stress and induced intergranular fracture in both pure Ni and Cu–Ni alloy. Furthermore, based on scanning transmission electron microscopy investigations, it was suggested that the evolution of dislocation structures had been enhanced by hydrogen, but only in the case of pure Ni. At 77 K, the ductility of pure Ni was degraded by hydrogen, whereas that of Cu–Ni alloy was not. The difference in temperature dependence of the dislocation‒hydrogen interaction between pure Ni and Cu–Ni alloy was discussed, based on the previously proposed HE mechanisms.

AB - In order to clarify the contribution of dislocation‒hydrogen interaction on the hydrogen embrittlement (HE) of pure Ni and of Cu‒55 wt% Ni binary alloy, slow strain rate tensile (SSRT) tests were conducted at room temperature (RT) and at 77 K on hydrogen-precharged specimens. Regarding the SSRT test at RT, hydrogen increased the flow stress and induced intergranular fracture in both pure Ni and Cu–Ni alloy. Furthermore, based on scanning transmission electron microscopy investigations, it was suggested that the evolution of dislocation structures had been enhanced by hydrogen, but only in the case of pure Ni. At 77 K, the ductility of pure Ni was degraded by hydrogen, whereas that of Cu–Ni alloy was not. The difference in temperature dependence of the dislocation‒hydrogen interaction between pure Ni and Cu–Ni alloy was discussed, based on the previously proposed HE mechanisms.

UR - http://www.scopus.com/inward/record.url?scp=85071596243&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85071596243&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2019.138349

DO - 10.1016/j.msea.2019.138349

M3 - Article

AN - SCOPUS:85071596243

VL - 766

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

M1 - 138349

ER -