确定微观结构对高温氢化水中激光粉末床熔融印刷 304L 不锈钢应力腐蚀开裂起始行为的影响

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2024-09-27 DOI:10.1016/j.corsci.2024.112482

Shihao Zhang , Shengkai Wang , Juan Hou , Wei Wang , Jiang Li , En-Hou Han , Wenjun Kuang

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引用次数: 0

摘要

本研究探讨了激光粉末床熔融（L-PBF）印刷 304 L 不锈钢在高温氢化水中的微观结构对应力腐蚀开裂（SCC）引发行为的影响。位错电池促进了铬的迁移，从而减轻了晶间氧化和 SCC 的引发。与热轧差排单元相比，压印差排单元减少了应变定位，有利于抑制 SCC 的发生。这是因为压印差排单元是稳定的，由大量的螺旋差排组成。微夹杂物会导致结节腐蚀，从而增加晶间氧化深度，促进 SCC 的形成。

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Determining the microstructure effects on the stress corrosion cracking initiation behavior of laser powder-bed-fusion printed 304L stainless steel in high-temperature hydrogenated water

This study investigated the microstructure effects on the stress corrosion cracking (SCC) initiation behavior of laser powder-bed-fusion (L-PBF) printed 304 L stainless steel in high-temperature hydrogenated water. The dislocation cells facilitate Cr transportation, thereby mitigating intergranular oxidation and SCC initiation. Compared to the warm-rolled dislocation cells, as-printed dislocation cells result in reduced strain localization, which is beneficial for suppressing SCC initiation. This is because the as-printed dislocation cells are stable and composed of abundant screw dislocations. Micro-inclusions can lead to nodular corrosion, thus increasing the depth of intergranular oxidation and promoting SCC initiation.

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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.