Enhancement Mechanism of Cerium in 316LN Austenitic Stainless Steel During Creep at 700 °C

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	Enhancement Mechanism of Cerium in 316LN Austenitic Stainless Steel During Creep at 700 °C
	Yang Renxian; Cai Xin; Zheng Leigang; Hu Xiaoqiang; Li Dianzhong
	2023
发表期刊	ACTA METALLURGICA SINICA（ENGLISH LETTERS）
ISSN	1006-7191
卷号	36 期号:3 页码:507-512
摘要	Effect of cerium (Ce) on creep strength and microstructure of 316LN austenitic stainless steel (316LN steel) at 700 °C/150 MPa was investigated by scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM) and thermodynamic calculations. Addition of 0.032 wt% Ce to 316LN steel results in a prominent increase in creep life from 313 to 556 h. Ce enriches in titanium nitride nanoparticles, increases slightly the activity and diffusion coefficient of Mo, and facilitates the formation of fine and dense intragranular Laves phase precipitates. Thus the creep strength is remarkably enhanced by Ce addition in 316LN steel through the intragranular Laves phase precipitation strengthening. It reveals a new insight into the improvement effect of rare earth (RE) elements such as Ce on creep strength of austenitic stainless steels, which inspired the design of RE-microalloying heat-resistant steels.
关键词	316LN austenitic stainless steel Rare earth Creep Laves phase Precipitation strengthening
语种	中文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/179551
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 GB/T 7714	Yang Renxian,Cai Xin,Zheng Leigang,et al. Enhancement Mechanism of Cerium in 316LN Austenitic Stainless Steel During Creep at 700 °C[J]. ACTA METALLURGICA SINICA（ENGLISH LETTERS）,2023,36(3):507-512.
APA	Yang Renxian,Cai Xin,Zheng Leigang,Hu Xiaoqiang,&Li Dianzhong.(2023).Enhancement Mechanism of Cerium in 316LN Austenitic Stainless Steel During Creep at 700 °C.ACTA METALLURGICA SINICA（ENGLISH LETTERS）,36(3),507-512.
MLA	Yang Renxian,et al."Enhancement Mechanism of Cerium in 316LN Austenitic Stainless Steel During Creep at 700 °C".ACTA METALLURGICA SINICA（ENGLISH LETTERS） 36.3(2023):507-512.