Microstructure, crystallography of phase transformations and multiple precipitations in PH 15-7Mo stainless steel
期刊名称：
Journal of Alloys and Compounds
2016 年
672 卷
摘要：
The microstructure and crystallographic features of a semi-austenitic precipitation hardening steel PH 15-7Mo during solution treatment, roddrawing and aging were investigated by means of optical microscope, X-ray diffraction analyzer and transmission electron microscope. It was found that the microstructure of the steel was consist of dominant austenite, small amount of martensite and 10-15 vol.% ??-ferrite after solution treatment at 1050 ?°C followed by cooling in water at room temperature. The austenite transformed into lath martensite during tensile roddrawing about 60% deforming companied with some coherent fine ??-NiAl particles precipitated within martensite. With higher aging temperature and longer holding time, tiny carbide M
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