effects of the tempering and high-pressure torsion temperatures on microstructure of ferritic/martensitic steel grade 91

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2018
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Abstract
Grade 91 (9Cr-1Mo) steel was subjected to various heat treatments and then to high-pressure torsion (HPT) at different temperatures. Its microstructure was studied using transmission electron microscopy (TEM) and X-ray diffraction (XRD). Effects of the tempering temperature and the HPT temperature on the microstructural features and microhardness in the ultrafine-grained (UFG) Grade 91 steel were researched. The study of the UFG structure formation takes into account two different microstructures observed: before HPT in both samples containing martensite and in fully ferritic samples.
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Authors ;Artur Ganeev;Marina Nikitina;Vil Sitdikov;Rinat Islamgaliev;Andrew Hoffman;Haiming Wen
Journal Nature Materials
Year 2018
DOI
10.3390/ma11040627
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