Abstract
1. Deformation of steel in the martensitic transformation range of temperatures is greatly facilitated by the existence of austenite in the structure, which has a high plasticity and low strength. 2. By comparison with cold working of martensite, deformation of steels in the martensitic transformation range produces a better combination of strength and ductility with less variation in the mechanical properties. 3. The absence of a maximum on the strength-tempering temperature curves indicates precipitation of carbon during deformation in the MS-Mf range. 4. The combination of the deformation of austenite at temperatures above the martensitic transformation range (HTTMT, LTTMT) and deformation in the martensitic transformation range after either one produces both high strength and elevated resistance to small plastic deformation. 5. HTTMT + strain in the MS-Mf range produces higher ductility at the same strength and also high "reversibility" of the properties on repeated rapid quenching with intermediate tempering.
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