Ferrite effects on the hydrogen embrittlement of 17-4PH stainless steel.
In: Anti-Corrosion Methods & Materials, Jg. 69 (2022-05-01), Heft 3, S. 331-338
academicJournal
Zugriff:
Purpose: The purpose of this study is to investigate the effect of ferrite on hydrogen embrittlement (HE) of the 17-4PH stainless steels. Design/methodology/approach: The effects of ferrite on HE of the 17-4PH stainless steels were investigated by observing microstructure and conducting slow-strain-rate tensile tests and hydrogen permeability tests. Findings: The microstructure of the ferrite-bearing sample is lath martensite and banded ferrite, and the ferrite-free sample is lath martensite. After hydrogen charging, the plasticity of the two steels is significantly reduced, along with the tensile strength of the ferrite-free sample. The HE susceptibility of the ferrite-bearing sample is significantly lower than the ferrite-free steel, and the primary fracture modes gradually evolved from typical dimple to quasi-cleavage and intergranular cracking. After aging at 480°C for 4 h and hydrogen charging for 12 h, the 40.9% HE susceptibility of ferrite-bearing samples was the lowest. In addition, the hydrogen permeation tests show that ferrite is a fast diffusion channel for hydrogen, and the ferrite-bearing samples have higher effective hydrogen diffusivity and lower hydrogen concentration. Originality/value: There are a few studies of the ferrite effect on the HE properties of martensitic precipitation hardening stainless steel. [ABSTRACT FROM AUTHOR]
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Titel: |
Ferrite effects on the hydrogen embrittlement of 17-4PH stainless steel.
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Autor/in / Beteiligte Person: | Zheng, Yaojie ; Sun, Huili ; Yan, Luchun ; Yang, Huisheng ; Gao, Kewei ; Pang, Xiaolu ; Volinsky, Alex A. |
Zeitschrift: | Anti-Corrosion Methods & Materials, Jg. 69 (2022-05-01), Heft 3, S. 331-338 |
Veröffentlichung: | 2022 |
Medientyp: | academicJournal |
ISSN: | 0003-5599 (print) |
DOI: | 10.1108/ACMM-03-2022-2615 |
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