The effect of microstructure of an advanced duplex stainless steel on the pitting corrosion and chloride-induced stress corrosion cracking resistance

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.2024.112489
Chaewon Jeong , Byeong Seo Kong , Junjie Chen , Qian Xiao , Changheui Jang
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Abstract

The effect of austenite morphology on the corrosion resistance of a newly-developed advanced duplex stainless steel (ADCS) was evaluated by electrochemical and chloride-induced stress corrosion cracking (CISCC) tests. By properly controlling heat treatment conditions, equiaxed (EQ) and elongated (EL) austenites were formed in ferrite matrix. ADCS-EQ exhibited higher pitting potential than ADCS-EL, primarily owing to less phase boundary. Meanwhile, ADCS-EL showed better CISCC resistance than ADCS-EQ, as the elongated austenite inhibited selective dissolution. Overall, the CISCC resistance of ADCS was more affected by austenite morphology and orientation, and would not be in accordance with pitting corrosion resistance.
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高级双相不锈钢微观结构对抗点蚀和氯化物应力腐蚀开裂性能的影响
通过电化学和氯化物诱导应力腐蚀开裂(CISCC)试验评估了奥氏体形态对新开发的高级双相不锈钢(ADCS)耐腐蚀性的影响。通过适当控制热处理条件,在铁素体基体中形成了等轴奥氏体(EQ)和伸长奥氏体(EL)。与 ADCS-EL 相比,ADCS-EQ 表现出更高的点蚀潜力,这主要是由于相界较少。同时,由于细长奥氏体抑制了选择性溶解,ADCS-EL 比 ADCS-EQ 显示出更好的抗 CISCC 性能。总的来说,ADCS 的抗 CISCC 能力受奥氏体形态和取向的影响较大,与抗点蚀能力并不一致。
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来源期刊
Corrosion Science
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.
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