Xin Tan , Xiheng Sun , Yiming Jiang , Jin Li , Gongqi Shi , Yangting Sun
{"title":"Effect of microstructure evolution caused by welding process on pitting behavior of 321 stainless steel","authors":"Xin Tan , Xiheng Sun , Yiming Jiang , Jin Li , Gongqi Shi , Yangting Sun","doi":"10.1016/j.corsci.2024.112591","DOIUrl":null,"url":null,"abstract":"<div><div>Pitting initiation mechanism of different areas of welded joints 321 stainless steel was clarified through potentiostatic pulse technique tests. Inclusions were found to be the main cause of pitting in the parent metal. However, δ-ferrite became the main pitting inducer of the fusion zone due to the inclusion elimination in welding process. The thick lathy δ-ferrite and the resulting Cr-depleted regions in tungsten inert gas welding fusion zone reduced the pitting resistance. The δ-ferrite in the fusion zone of electron beam welded joint was fine and evenly distributed, thus the fusion zone showed excellent pitting resistance.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"243 ","pages":"Article 112591"},"PeriodicalIF":7.4000,"publicationDate":"2024-11-22","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/S0010938X2400787X","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
Pitting initiation mechanism of different areas of welded joints 321 stainless steel was clarified through potentiostatic pulse technique tests. Inclusions were found to be the main cause of pitting in the parent metal. However, δ-ferrite became the main pitting inducer of the fusion zone due to the inclusion elimination in welding process. The thick lathy δ-ferrite and the resulting Cr-depleted regions in tungsten inert gas welding fusion zone reduced the pitting resistance. The δ-ferrite in the fusion zone of electron beam welded joint was fine and evenly distributed, thus the fusion zone showed excellent pitting resistance.
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.