Hydrogen-induced change in microstructure and properties of steels: 18Cr10Mn–0.4N vis-à-vis 18Cr10Ni

ABSTRACT

Cr–Mn–N stainless steels have a cost and strength advantage over conventional Cr–Ni stainless steels. In this study microstructure and mechanical property of hydrogen-charged 18Cr10Mn-0.4N was compared with 18Cr10Ni austenitic stainless steel. This is the first such study for 18Cr10Mn–0.4N austenitic stainless steel. Electron microscopy was used to compare the deformed microstructure of the uncharged and hydrogen-charged specimens. The results are discussed in view of the current knowledge on hydrogen embrittlement. The 18Cr10Mn–0.4N steel suffered higher embrittlement mainly because it absorbed moref hydrogen.

KEYWORDS:

• Austenitic stainless steel
• Cr–Mn–N
• hcp-martensite
• hydrogen
• embrittlement
• microscopy

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Han-Jin Kim http://orcid.org/0000-0002-3919-5007

M. P. Phaniraj http://orcid.org/0000-0002-3163-2022

Additional information

Funding

The work at Seoul National University was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT & Future Planning (MSIP) (No. NRF-2015R1A5A1037627). The work at Korea Institute of Science and Technology (KIST) was supported by the Convergence Agenda Program (CAP) of the Korea Research Council of Fundamental Science and Technology. The work at Korea University was funded by the Ministry of Trade, Industry and Energy MI Korea (10069159).