Effect of Welding Process on the Stress Corrosion Phenomena of High Strength and High Toughness 3Ni-Cr-Mo Steel
Creators
- 1. Research Institute of Industrial Science and Technology, Pohang (Korea, Republic of)
- 2. Pohang University of Science and Technology, Pohang (Korea, Republic of)
- 3. Agency for Defence Development, Daejeon (Korea, Republic of)
Description
Stress corrosion phenomena of a high strength and high toughness 3Ni-Cr-Mo steel were investigated with various welding and electrochemical parameters. The weldment specimens were prepared by using two different welding techniques of the shielded metal are welding (SMAW) and gas metal are welding (GMAW). The KISCC values of GMAW specimens were higher than those of the SMAW specimens due to higher amount of inclusions in the latter. Dominant crack propagation mode was quasi-cleavage (QC) type in GMAW specimens and intergranular cracking (IG) type in SMAW specimens. The hydrogen charging effect was clearly observed from the specimens tested at -1020 mV (vs.SCE) where hydrogen evolution became significant. However, the hydrogen charging effect can be properly controlled by adjusting the optimum cathodic potential. The stress corrosion property of 3Ni-Cr-Mo steel weldment can be improved by selecting a proper welding method with good shielding efficiency as well as by controlling an appropriate cathodic protection potential
Additional details
Publishing Information
- Journal Title
- Journal of the Corrosion Science Society of Korea
- Journal Volume
- 20
- Journal Issue
- 4
- Series
- 15 refs, 10 figs, 5 tabs
- Journal Page Range
- p. 247-260
- ISSN
- 0253-312X
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 45022823
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CONTROL; CRACKS; FRACTURE PROPERTIES; NICKEL STEELS; STRESS CORROSION; WELDING
- Descriptors DEC
- ALLOYS; CARBON ADDITIONS; CHEMICAL REACTIONS; CORROSION; FABRICATION; IRON ALLOYS; IRON BASE ALLOYS; JOINING; MECHANICAL PROPERTIES; NICKEL ALLOYS; STEELS; TRANSITION ELEMENT ALLOYS