期刊
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
卷 41A, 期 11, 页码 2871-2879出版社
SPRINGER
DOI: 10.1007/s11661-010-0288-1
关键词
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资金
- Tata Steel, Jamshedpur
- Department of Science and Technology, New Delhi [SR/S5/NM-04/2005]
- INAE Visvesvarya Chair Professorship
This study attempts to determine the scope and extent of microstructural refinement through complete/partial recrystallization of prior cold deformed ferrite during austenitizing (1223 K (950 degrees C), 15 minutes) and/or austempering (543 K (270 degrees C), 30 minutes) followed by water quenching to obtain ultrafine bainitic sheaves along with thin martensitic plates in SAE 52100 steel. The volume fraction and sheaf/plate dimension (thickness/length) of bainitic ferrite and martensite were determined by optical and scanning/transmission electron microscopy studies coupled with compositional microanalysis. Marginal improvement in the tensile strength and significant improvement in the impact properties is obtained at an optimum level of prior cold deformation by tension in comparison to that recorded in austempered condition without prior deformation.
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