Sugimoto, K.-I.; Nakashima, Y.; Kobayashi, J.; Hojo, T. Effects of Partial Replacement of Si by Al on Impact Toughness of 0.2%C-Si-Mn-Cr-B TRIP-Aided Martensitic Steel. Metals2023, 13, 1206.
Sugimoto, K.-I.; Nakashima, Y.; Kobayashi, J.; Hojo, T. Effects of Partial Replacement of Si by Al on Impact Toughness of 0.2%C-Si-Mn-Cr-B TRIP-Aided Martensitic Steel. Metals 2023, 13, 1206.
Sugimoto, K.-I.; Nakashima, Y.; Kobayashi, J.; Hojo, T. Effects of Partial Replacement of Si by Al on Impact Toughness of 0.2%C-Si-Mn-Cr-B TRIP-Aided Martensitic Steel. Metals2023, 13, 1206.
Sugimoto, K.-I.; Nakashima, Y.; Kobayashi, J.; Hojo, T. Effects of Partial Replacement of Si by Al on Impact Toughness of 0.2%C-Si-Mn-Cr-B TRIP-Aided Martensitic Steel. Metals 2023, 13, 1206.
Abstract
The effects of partial replacement of Si by Al on the microstructure, tensile properties, and Charpy impact toughness were investigated using 0.2%C-Si/Al-Mn-Cr-B TRIP-aided martensitic steels. The impact toughness was related to the microstructural and mechanical properties. The partial re-placement decreased the volume fraction of retained austenite and increased the mechanical stabil-ity, accompanied by softening and an increase in the volume fraction of the primary martensite. Resultantly, the partial replacement decreased strength and ductility. The impact absorbed energy (value) at 25 C was slightly increased by the partial replacement. The increased impact absorbed energy was mainly caused by high crack/void propagation energy due to the softened primary martensite and a small contribution of the stabilized retained austenite. The 50% shear fracture ductile-to-brittle transition temperature was marginally raised by the partial replacement. The raised transition temperature was mainly associated with an increase in a unit crack path of qua-si-cleavage/cleavage fracture.
Keywords
TRIP-aided martensitic steel; Al addition; microstructure; tensile property; impact toughness
Subject
Engineering, Metallurgy and Metallurgical Engineering
Copyright:
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