High-temperature oxidation behavior of modified 4Al alumina-forming austenitic steel: Effect of cold rolling

查看全文 作　　者：Qiuzhi [1,2]Gao;Ziyun [1,2]Liu;Huijun [3]Li;Hailian [4]Zhang;Chenchen [1,2]Jiang;Aimin [1,2]Hao;Fu [1,2]Qu;Xiaoping [1,2]Lin

机构地区：[1]School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China;[2]School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;[3]School of Materials Science&Engineering,Tianjin University,Tianjin 300354,China;[4]Daotian High Technology Co.,Ltd.,Qinhuangdao 066004.China

出　　处：《Journal of Materials Science & Technology》索引2021年第9期,共12页

基　　金：financially supported by the National Natural Science Foundation of China and Shanghai Baosteel Group Company(No. U1960204);the National Natural Science Foundation of China(Nos. 51871042 and 51501034);the Fundamental Research Funds for the Central Universities (No. N2023026)。 摘　　要：The oxidation behavior and mechanism of as-received and 30 % cold-rolled alumina-forming austenitic(AFA) steel were investigated in dry air at 700℃.The results show that the mass gain per unit area curves of as-received and 30 % cold-rolled steels subject to near-parabolic law before 100 h oxidation time.Two samples both show higher high-temperature oxidation resistance due to the formation of dense Al_(2)O_(3) oxide scale.Gradual spallation of outer scale results in the formation of continuous and dense alumina scale.Dislocations can act as short-circuit diffusion channel for the diffusion of Al from alloy matrix to surface,and also provide nucleation sites for B2-NiAl phase,which ensure the continuous formation of Al_(2)O_(3) scale. 关键词：Alumina-forming austenitic steel High-temperature oxidation Cold rolling Oxidation mechanism

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High-temperature oxidation behavior of modified 4Al alumina-forming austenitic steel: Effect of cold rolling

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