Journal
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Volume 41A, Issue 11, Pages 2871-2879Publisher
SPRINGER
DOI: 10.1007/s11661-010-0288-1
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Funding
- Tata Steel, Jamshedpur
- Department of Science and Technology, New Delhi [SR/S5/NM-04/2005]
- INAE Visvesvarya Chair Professorship
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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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