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Phase Characterization and Formation Behavior in 6 wt% Si High-silicon Austenitic Stainless Steel during Isothermal Aging
Chen, Sihan; Liang, Tian; Zhou, Yangtao; Xing, Weiwei; Zheng, Chengwu; Ma, Yingche; Wu, JinMing; Li, Guobin; Liu, Kui
2020-10-15
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
AbstractThe precipitation behavior of different phases in a high-silicon stainless steel (6 wt% Si) during aging at 600-1050 degrees C for 24 h was investigated. The morphology, crystal structure and composition of various precipitates were detailly characterized using optical microscopy, scanning electron microscopy and transmission electron microscopy. Four phases were mainly identified:chi-phase,M6C carbides,sigma phase and a new type offcc-phase. During aging at 600-900 degrees C, the main precipitate was (Cr, Mo and Si)-rich chi-phase which was directly precipitated from gamma matrix. The chi-phase was calibrated as bcc structure with a lattice parameter of 8.90 A. The peak temperature for the precipitation of chi-phase was 800 degrees C, and it was dissolved when aging at temperatures above 1000 degrees C. The sigma-phase was observed only at 700 degrees C and grew next to chi-phase. Above 700 degrees C, a newfcc-phase was found to be precipitated along with chi-phase, with a space group ofFd3cand a lattice parameter of 12.56 A. TheM(6)C carbides started to be precipitated at 700 degrees C in the vicinity of chi-phase. And its amount basically increased with the increasing of temperature. An orientation relationship betweenM(6)C/gamma was found: [100]c//[100]gamma, (001)c//(001)gamma, i.e., the cube-on-cube relationship.
DOI10.1007/s40195-020-01152-7
WOS IDWOS:000577229500001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82440
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Chen, Sihan,Liang, Tian,Zhou, Yangtao,et al. Phase Characterization and Formation Behavior in 6 wt% Si High-silicon Austenitic Stainless Steel during Isothermal Aging[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2020.
APA Chen, Sihan.,Liang, Tian.,Zhou, Yangtao.,Xing, Weiwei.,Zheng, Chengwu.,...&Liu, Kui.(2020).Phase Characterization and Formation Behavior in 6 wt% Si High-silicon Austenitic Stainless Steel during Isothermal Aging.ACTA METALLURGICA SINICA-ENGLISH LETTERS.
MLA Chen, Sihan,et al."Phase Characterization and Formation Behavior in 6 wt% Si High-silicon Austenitic Stainless Steel during Isothermal Aging".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2020).
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