Effect of laser power on hydrogen embrittlement and microstructural evolution in selective laser melted 304L austenitic stainless steel

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Science Pub Date : 2025-02-22 DOI:10.1016/j.corsci.2025.112814

Chilou Zhou , Xinrui Yan , Yulin Long , Junyang Chen , Xinfeng Li , Xiang Li

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引用次数: 0

Abstract

The effect of laser power on hydrogen embrittlement (HE) and microstructural evolution in selective laser melted (SLM) 304 L stainless steel was systematically investigated. Slow strain rate tensile (SSRT) tests, X-ray diffraction (XRD), electron backscatter diffraction (EBSD), and hydrogen microprint technique (HMT) were employed to analyze HE susceptibility and mechanism of SLM 304 L. Results show that hydrogen embrittlement resistance decreases with increasing laser power, with 150 W yielding the highest resistance (HEI = 0.963). Microstructural analysis indicated that cellular structures with high-density dislocation walls acted as hydrogen traps, reducing hydrogen accumulation at grain boundaries and suppressing intergranular fracture. Furthermore, increasing laser power led to grain coarsening and a decrease in dislocation density, and promoting HE. These findings provide insight into the correlation between SLM parameters, microstructure, and HE behavior.

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.