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题名: sigma-Phase Precipitation Mechanism of 15Cr-15Ni Titanium-Modified Austenitic Stainless Steel During Long-Term Thermal Exposure
作者: Wang, ZN;  Liang, T;  Xing, WW;  Du, AB;  Gao, M;  Ma, YC;  Liu, K
发表日期: 2018-3-1
摘要: The sigma-phase precipitation in 20% cold-worked 15Cr-15Ni titanium-modified austenitic stainless steel was studied during long-term aging treatment. During the isothermal aging stage, the amount of sigma-phase was significantly increased at beginning and gradually became constant. The aging time only slightly affected the size and morphology of the sigma-phase. Conversely, during the isochronal aging stage, the amount of sigma-phase grew rapidly with the increase in the aging temperature. The sigma-phase with a large amount of stacking faults was prone to nucleate around the (Ti, Mo) C particles or at the grain boundaries. The (Ti, Mo) C particles can act as effective nucleation sites, where the sigma-phase directly precipitates from the austenitic matrix. From this work, the growth of sigma-phase is found to be influenced by the aging temperature, and a new mechanism of sigma-phase precipitation from austenite has been proposed.
刊名: ACTA METALLURGICA SINICA-ENGLISH LETTERS
Appears in Collections:中国科学院金属研究所_期刊论文

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Recommended Citation:
Wang, ZN,Liang, T,Xing, WW,et al. Sigma-phase Precipitation Mechanism Of 15cr-15ni Titanium-modified Austenitic Stainless Steel During Long-term Thermal Exposure[J]. Acta Metallurgica Sinica-english Letters,2018,31(3):281-289.

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