Hongjun Li , Ming Huang , Yuan Qin , Lin Hong , Sen Yang
{"title":"New insights into oxidation and creep characteristics of T91 heat-resistant steel in martensitic and ferritic states","authors":"Hongjun Li , Ming Huang , Yuan Qin , Lin Hong , Sen Yang","doi":"10.1016/j.corsci.2024.112487","DOIUrl":null,"url":null,"abstract":"<div><div>This study systematically compared the oxidation and creep characteristics of T91 steel in both martensitic and ferritic states. Findings indicate the formation of mixed oxides, including Fe<sub>3</sub>O<sub>4</sub>, (Cr, Mn)<sub>2</sub>O<sub>3</sub>, and MnCr<sub>2</sub>O<sub>4</sub>, during the oxidation process. In the ferritic specimens, the oxygen diffusion channel is restricted due to the transition of M<sub>23</sub>C<sub>6</sub> carbide. Moreover, the ferritic steel exhibits poor creep life, and a strong α fibre texture was observed. For T91 steel, appropriate thermomechanical treatment can lead to uniform distribution of M<sub>23</sub>C<sub>6</sub> carbides within the matrix, achieving the optimal precipitation strengthening effect and resulting in improved high-temperature properties.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"240 ","pages":"Article 112487"},"PeriodicalIF":7.4000,"publicationDate":"2024-09-27","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/S0010938X24006826","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 systematically compared the oxidation and creep characteristics of T91 steel in both martensitic and ferritic states. Findings indicate the formation of mixed oxides, including Fe3O4, (Cr, Mn)2O3, and MnCr2O4, during the oxidation process. In the ferritic specimens, the oxygen diffusion channel is restricted due to the transition of M23C6 carbide. Moreover, the ferritic steel exhibits poor creep life, and a strong α fibre texture was observed. For T91 steel, appropriate thermomechanical treatment can lead to uniform distribution of M23C6 carbides within the matrix, achieving the optimal precipitation strengthening effect and resulting in improved high-temperature properties.
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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