Abstract Most mechanisms used for strengthening crystalline materials, e.g. introducing crystalline interfaces, lead to the reduction of ductility. An additive manufacturing process selective laser melting breaks this trade-off by introducing dislocation network, which produces a stainless steel with both significantly enhanced strength and ductility.
A precipitation-hardened high-entropy alloy with Lamellar eutectic structure in Al 0.7 CoCrFeNi high-entropy alloy (HEA) is emerging as a promising candidate for structural applications because of its high strength-ductility combination. The alloy consists of a fine-scale lamellar fcc + B2 microstructure with high flow stresses > 1300 MPa under quasi-static tensile deformation and >10% ductility.
The excellent combination of high strength and good ductility comes from extraordinary work-hardening ability arising from the heterogeneous gradient structure and the abundant extremely thin nanoscale deformation twins. Despite having otherwise outstanding mechanical properties, the practical application of CrCoNi medium-entropy alloy (MEA) is limited by its insufficient r.
Deformation behavior of nanocrystalline and ultrafine The UFG HEAs exhibited high strength and good ductility because of the activation of dislocation. View HTML M., and Langdon, T.G.:Microstructure and properties of a CoCrFeNiMn high-entropy alloy processed by equal-channel angular pressing Towards strengthductility synergy through the design of heterogeneous nanostructures in
Deliang Zhang's lab Shanghai Jiao Tong University (SJTU)A high tensile yield strength of 1298 MPa and good ductility (uniform elongation:9.4%) of CoCrFeNiMn high entropy alloy can be sustained by a multilevel structural heterogeneity facilitated by
External strengthening through microstructural refinement led to a yield strength nearly double that of the parent alloy, CoCrNi. The increase in strength is obtained with still good ductility when tested down to 77 K. Nanoscale twin boundaries are observed in the post-fracture microstructure under 77 K.
Simultaneous enhancement of strength and ductility with Aug 12, 2020 · A novel nanostructure to achieve ultrahigh strength and good tensile ductility of a CoCrFeNiMn high entropy alloy. Nanoscale, Vol. 12, No. 9, 2020, pp. 53475352.  Wang, X., B. Huang, L. Wang, and Y. Rong. Microstructure and mechanical properties of microalloyed high-strength transformation-induced plasticity steels.
Tailored microstructures and strengthening mechanisms in Translate this pageDual-phase high-entropy alloys (DP-HEAs) with excellent strength-ductility combinations have attracted scientific interests. In the present study, the microstructures of AlCrCuFeNi30 DP-HEA fabricated via selective laser melting (SLM) are rationally adjusted and controlled. The mechanisms engendering the hierarchical microstructures are revealed.
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Yu LIU PhD Student Doctor of Engineering Shanghai A high tensile yield strength of 1298 MPa and good ductility (uniform elongation:9.4%) of CoCrFeNiMn high entropy alloy can be sustained by a multilevel structural heterogeneity facilitated by
Yuehuang XIE Doctor of Philosophy Shanghai Jiao Tong A high tensile yield strength of 1298 MPa and good ductility (uniform elongation:9.4%) of CoCrFeNiMn high entropy alloy can be sustained by a multilevel structural heterogeneity facilitated by