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Effect of Mo on High-Temperature Fatigue Behavior of 15CrNbTi Ferritic Stainless Steel

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文摘 In order to understand the effect of Mo element on the high-temperature fatigue behavior of 15CrNbTi ferritic stainless steel, the stress-controlled fatigue tests have been performed for both 15CrNbTi and 15Cr0.5MoNbTi ferritic stainless steels at 800 ℃ in laboratory air. The fatigue test results indicate that the fatigue resistance of 15Cr0.5MoNbTi steel is manifestly higher than that of 15CrNbTi steel at the maximum stress below 57 MPa; the 15Cr0.5MoNbTi steel possesses a fatigue limit of 35 MPa, which is higher than that of 15CrNbTi steel. The TEM observations reveal that the Mo element can suppress the formation of coarsened Fe_3Nb_3C precipitates and result in the fatigue resistance enhancement. The dislocation networks formed during the cyclic load favor to improve the fatigue resistance of 15Cr0.5MoNbTi steel at 800 ℃.
来源 Acta Metallurgica Sinica(English Letters) ,2014,27(3):452-456 【核心库】
DOI 10.1007/s40195-014-0064-0
关键词 Ferritic stainless steel ; High-temperature fatigue ; Mo ; Microstructure
地址

1. School of Materials Science & Engineering, Shenyang University of Technology, Shenyang, 110870  

2. Baosteel Group, State Key Laboratory of Development and Application Technology of Automobile Steels, Shanghai, 201900

语种 英文
文献类型 研究性论文
ISSN 1006-7191
学科 金属学与金属工艺
基金 国家自然科学基金
文献收藏号 CSCD:5198094

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引证文献 7

1 李鑫 中铬铁素体不锈钢18CrNb高温氧化行为 材料研究学报,2016,30(4):263-268
被引 6

2 Zhao Qinghe Effects of W and Mo Additions on Wet-dry Acid Corrosion Behavior of Low-Alloy Steels Under Different O_2 Concentrations Acta Metallurgica Sinica(English Letters),2016,29(10):951-962
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