Age Hardening of the Al0.5CoCrNiTi0.5 High-Entropy Alloy

Autor:	Che-Fu Lee, Tao-Tsung Shun
Rok vydání:	2013
Předmět:	Materials science Alloy Metallurgy Metals and Alloys Vacuum arc engineering.material Condensed Matter Physics Microstructure Precipitation hardening Mechanics of Materials Hardening (metallurgy) engineering Dendrite (metal) Softening Eutectic system
Zdroj:	TMS2013 Supplemental Proceedings
ISSN:	1543-1940 1073-5623
DOI:	10.1007/s11661-013-1931-4
Popis:	Al0.5CoCrNiTi0.5 high-entropy alloy was synthesized by vacuum arc melting in a copper mold. This alloy was aged at 773 K to 1473 K (500 °C to 1200 °C) for 24 hours to investigate the microstructure and hardness. The hardness of the as-cast alloy is HV743, and it exhibits a dendritic structure, in which dendrite is composed of body-centered cubic (bcc), face-centered cubic (fcc), and σ phases, and interdendrite is an eutectic structure consisting of bcc and order bcc phases. Apparent age hardening appears at 873 K to 1173 K (600 °C to 900 °C), and no age softening occurs even after 1473 K (1200 °C) aging. The age hardening of this alloy is attributed to the transformation of the bcc phase to σ phase. Detailed variations of hardness and the microstructure of aged alloys are reported in this article.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::46c808ab2195a35695dc368a5362cede https://doi.org/10.1007/s11661-013-1931-4 Zobrazit plný text záznamu Full text from SpringerLink