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- W2500907529 abstract "Abstract The strain hardening behavior and evolution of deformation structure for functionally graded 9Cr18 steel were investigated in the article. Meta-austenite was retained after semi-solid forming, while the liquid was extruded outside to form fine dendrites. Thus the material could demonstrate functionally graded property. Solid austenite grains inside the solid/liquid boundary were connected with each other and would support the high strength with compressive strength of 4680 MPa at compression ratio of 53.2%. The material exhibited obvious four-stage strain hardening characteristics with a long continuous strain hardening stage. The stacking fault energy (SFE) for inner austenite was calculated to be ~24.2 mJ/m 2 and the value fell into intermediate range. The deformation behavior was dominated by planar dislocation, suppression of cross slip and formation of secondary deformation structures (mechanical twinning and ϵ-martensite). The formation of multiple variants of mechanical twinning or ϵ-martensite played a dynamic Hall-Petch effect and the tendency of synchronous improvement of strength and plasticity (SISP) was obtained. The functionally graded property avoided crack formation from brittle eutectic and the material demonstrated a unique ductile fracture characterization." @default.
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- W2500907529 date "2016-09-01" @default.
- W2500907529 modified "2023-09-29" @default.
- W2500907529 title "Plastic deformation behavior of functionally graded 9Cr18 steel after thixoforging and heat treatment" @default.
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- W2500907529 doi "https://doi.org/10.1016/j.msea.2016.07.065" @default.
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