期刊
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
卷 16, 期 6, 页码 1229-1236出版社
UNIV FED SAO CARLOS, DEPT ENGENHARIA MATERIALS
DOI: 10.1590/S1516-14392013005000129
关键词
cooling rate; martensite formation; grain boundaries; stacking fault energy
资金
- FAPEMIG [TEC PPM-00373/11]
- CNPq [471128/2011-2]
- CAPES-PDSE scholarship of SSFD
The cooling rate, density of stacking faults, austenite grain size, and temperature strongly influence the gamma(fcc) -> epsilon(hcp) -> alpha'(bcc) martensite transformation in austenitic alloys. During cooling, austenitic Fe-Mn steels can partially transform to epsilon and alpha' martensites within a restricted chemical composition. Martensite formation will influence the mechanical behavior of the alloy. The microstructure evolution under three cooling rates of a hot-rolled austenitic steel, Fe-17.0Mn-0.06C (wt%), was analyzed by optical microscopy and scanning electron microscopy/electron backscatter diffraction. The volume fraction of martensite and austenite were measured by X-ray diffraction line profile analysis by directly comparing the as-cast alloy, alloy subjected to different cooling conditions, and this processed with hot rolling.
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