Abstract
Abstract In this study, the effect of aging treatment for 24–144 h at 600–1000 °C on the hardness and microstructure of an as-cast CoCrFeNiMo 0.85 high-entropy alloy was investigated. The microstructure of the as-cast alloy consists of three different phases that include an face-centered cubic solid solution matrix, a (Mo,Cr)-rich σ phase, and a minor (Mo,Cr)-rich μ phase. The σ phase can be completely transformed into the μ phase via aging at 900–1000 °C. The optimum hardness is obtained upon precipitation of fine needles of σ phase in the face-centered cubic matrix, which occurs at an aging temperature of 700 °C. The hardening effect is observed to decrease with any further increase in temperature beyond 700 °C. Comparison of the hardness of aged alloys and the as-cast alloy reveals that no obvious softening occurs after aging at temperatures of up to 1000 °C.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
