Hydrogen-involved tensile and cyclic deformation behavior of low-alloy pressure vessel steel |
| |
| Authors: | Xinqiang Wu Yasuyuki Katada In S Kim Sang G Lee |
| |
| Affiliation: | (1) the Corrosion Resistant Design Group, Steel Research Center, National Institute for Materials Science, 305-0047 Ibaraki, Japan;(2) the Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, 305-701 Daejeon, South Korea;(3) Present address: the School of Nuclear Engineering, Purdue University, 47907-2017 West Lafayette, IN |
| |
| Abstract: | The temperature- and strain-rate-dependent tensile behavior of hydrogen-charged low-alloy pressure vessel steel ASTM A508
C1.3 has been investigated. The fatigue crack initiation and propagation behavior of the steel in high-temperature water environments
has also been evaluated. It was found that hydrogen played significant roles in both tensile and cyclic deformation processes,
especially in the temperature and strain-rate region of dynamic strain aging (DSA). The presence of hydrogen resulted in a
distinct softening in tensile strength and a certain loss in tensile ductility in the DSA region. Remarkable degradation in
fatigue crack initiation and propagation resistance in high-temperature water environments was observed in the DSA strain-rate
region. Typical hydrogen-induced cracking features also appeared on the corresponding fatigue fracture surfaces. The interactions
between hydrogen and DSA in tensile and cyclic deformation processes are discussed as well as their combined effects on the
environmentally assisted cracking (EAC) mechanism of pressure vessel steels in high-temperature water environments. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
