Selective laser melting enabling the hierarchically heterogeneous microstructure and excellent mechanical properties in an interstitial solute strengthened high entropy alloy
By Zhiguang Zhu, Xianghai An, Wenjun Lu, Zhiming Li, F. L. Ng, Xiaozhou Liao, U. Ramamurty, S. Nai, Jun Wei. Materials Research Letters, 2019
158 citations recorded by the source corpus.
ABSTRACT An interstitial solute strengthened high entropy alloy (iHEA), Fe49.5Mn30Co10Cr10C0.5 (at.%), was successfully additively manufactured via selective laser melting. The as-built iHEA exhibits a hierarchically heterogeneous microstructure with length scales across several orders of magnitude, which engenders an enhanced strength–ductility combination relative to those fabricated by conventional processing routes. The high yield strength mainly stemmed from the dislocation strengthening besides the friction stress and grain boundary strengthening. The joint activation of multiple deformation mechanisms involving dislocation slip, deformation twinning and phase transformation can maintain the steady work-hardening behavior at high stress levels, leading to a high ductility. GRAPHICAL ABSTRACT IMPACT STATEMENT A hierarchical interstitial high entropy alloy, Fe49.5Mn30Co10Cr10C0.5 (at.%), was successfully additively manufactured via selective laser melting. Its exceptional strength–ductility synergy surpasses that of the most SLM processed conventional alloys.
Subfields: Aerospace Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/c2f9f145bcd2b472378e5fc5291c0ec90e25456c
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Citations in the corpus
- Review of Powder Bed Fusion Additive Manufacturing for Metals (2021, methodology): “%), fabricated using SLM, showed an enhanced strength–ductility combination, superior to the as-cast sample [363].”