Dislocation driven evolution of passivity in L-PBF 316 L: Unveiling the impact of thermal exposure

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

Corrosion Science Pub Date : 2025-10-13 DOI:10.1016/j.corsci.2025.113409

Arshad Yazdanpanah , Lorenzo D’Ambrosi , Giulia Bilanzone , Mona Khodabakhshi , Reynier I. Revilla

{"title":"Dislocation driven evolution of passivity in L-PBF 316 L: Unveiling the impact of thermal exposure","authors":"Arshad Yazdanpanah , Lorenzo D’Ambrosi , Giulia Bilanzone , Mona Khodabakhshi , Reynier I. Revilla","doi":"10.1016/j.corsci.2025.113409","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigates the influence of subcritical thermal exposure on the passivation behaviour of laser powder bed fusion (L-PBF) processed 316 L stainless steel, with a focus on dislocation-driven mechanisms under industrially relevant conditions. A novel approach was taken by systematically examining the evolution of corrosion resistance as a function of both residual stress and dislocation density across a temperature range of 100–400 °C. The methodology integrated electrochemical characterisation with microstructural and crystallographic analysis. Results revealed a progressive decline in passive film stability up to 300 °C, corresponding with reduced dislocation density and stress relaxation. However, at 400 °C, passive film performance improved significantly despite further residual stress reduction. This behaviour was linked to the start of microstructural recovery, dissolution of subgrain boundaries, and a redistribution of geometrically necessary dislocations.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"258 ","pages":"Article 113409"},"PeriodicalIF":7.4000,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Corrosion Science","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0010938X25007371","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

This study investigates the influence of subcritical thermal exposure on the passivation behaviour of laser powder bed fusion (L-PBF) processed 316 L stainless steel, with a focus on dislocation-driven mechanisms under industrially relevant conditions. A novel approach was taken by systematically examining the evolution of corrosion resistance as a function of both residual stress and dislocation density across a temperature range of 100–400 °C. The methodology integrated electrochemical characterisation with microstructural and crystallographic analysis. Results revealed a progressive decline in passive film stability up to 300 °C, corresponding with reduced dislocation density and stress relaxation. However, at 400 °C, passive film performance improved significantly despite further residual stress reduction. This behaviour was linked to the start of microstructural recovery, dissolution of subgrain boundaries, and a redistribution of geometrically necessary dislocations.

查看原文本刊更多论文

位错驱动的L- pbf 316钝化演化 L：揭示热暴露的影响

本研究研究了亚临界热暴露对激光粉末床熔合（L- pbf）加工的316 L不锈钢钝化行为的影响，重点研究了工业相关条件下位错驱动的机制。采用了一种新颖的方法，系统地研究了在100-400°C的温度范围内，作为残余应力和位错密度函数的耐蚀性的演变。该方法将电化学表征与微观结构和晶体学分析相结合。结果表明，钝化膜的稳定性在300°C时逐渐下降，相应的是位错密度和应力松弛的减少。然而，在400°C时，尽管残余应力进一步降低，但钝化膜的性能显著提高。这种行为与微观结构恢复的开始、亚晶界的溶解以及几何上必要的位错的重新分布有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.

Dislocation driven evolution of passivity in L-PBF 316 L: Unveiling the impact of thermal exposure

Abstract

Dislocation driven evolution of passivity in L-PBF 316 L: Unveiling the impact of thermal exposure