The effect of hydrogen on dislocation motion and cracking in tungsten foil

Cao, Hailin; Wang, Shuai

2022-10-01

10.1016/j.corsci.2022.110547

CORROSION SCIENCE   影响因子和分区

0010-938X

1879-0496

By investigating the change of microstructure features in the presence and absence of hydrogen, we studied the influence of internal hydrogen on the plastic deformation ahead of a crack tip in tungsten foil. After micro -mechanical loading, ahead of the crack tip in the hydrogen-charged tungsten, we found an intermittent plastic zone composed of dislocation tangles and a dislocation network with an L-square shape. The L-square dislocation structure tended to move along the crack propagation direction. These observations are attributed to the hydrogen effect on the energy release rate and the stress intensity factor. The propagation of crack is considered a result of the competition between H-modified dislocation motion and H-induced decohesion.

Hydrogen embrittlement Tungsten Dislocation motion Fracture

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[51901098] ; Shenzhen Science and Technology Innovation Commission["KQTD2019092917250571","GJHZ20200731095213039","JCYJ20210324104414040"]

Materials Science ; Metallurgy & Metallurgical Engineering

Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000842962100001

PERGAMON-ELSEVIER SCIENCE LTD

20223412596526

Crack propagation ; Crack tips

Tungsten and Alloys:543.5 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

Southern Univ Sci & Technol, Dept Mech & Energy Engn, 1088 Xueyuan Blvd, Shenzhen 518055, Peoples R China

Cao, Hailin,Wang, Shuai. The effect of hydrogen on dislocation motion and cracking in tungsten foil[J]. CORROSION SCIENCE,2022,207.

Cao, Hailin,&Wang, Shuai.(2022).The effect of hydrogen on dislocation motion and cracking in tungsten foil.CORROSION SCIENCE,207.

Cao, Hailin,et al."The effect of hydrogen on dislocation motion and cracking in tungsten foil".CORROSION SCIENCE 207(2022).