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Microestructure and mecahnical properties of RS melt-spun Ni-Cr-Al alloys

AuthorsAdeva, Paloma; González-Carrasco, José Luis; Aballe, Miguel
Issue Date1990
CitationActa Metallurgica et Materialia 38: 643-653 (1990)
AbstractThe microstructure and mechanical properties of three melt-spun NiCrAl alloy ribbons have been studied in the as-cast condition as well as after thermal treatments. The microstructure of the alloys is dendritic-microcellular in as-cast condition and phases present for 10 at.% Al and 30 at.% Al alloys are as is predicted by the equilibrium phase diagram. In the 20 at.% Al alloy, γ' has frozen in metastable form and partial ordering takes place during cooling in the solid state. After thermal treatments the ribbons generally maintain a refined microstructure; α phase precipitates are always found in β and γ' phases in 20 and 30 at.% Al alloys. The hardness of the alloys increases with aluminum content. The tensile strength at room temperature is related to the phases present in the material for each state of treatment. The alloys are brittle, a higher ductility always being obtained in the as-cast condition.
Identifiersdoi: 10.1016/0956-7151(90)90220-B
issn: 1359-6454
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