On the sintered Ni-base superalloy. (III) Effect of heat treatment on the structure

Autor:	Masao Morishita, Hiroshi Nagai, Keiichiro Shoji, Fusaki Koshiishi
Rok vydání:	1985
Předmět:	Exothermic reaction Swaging Materials science Precipitation (chemistry) Mechanical Engineering Metallurgy Metals and Alloys Analytical chemistry Sintering Atmospheric temperature range Industrial and Manufacturing Engineering Superalloy Phase (matter) Materials Chemistry Grain boundary
Zdroj:	Journal of the Japan Society of Powder and Powder Metallurgy. 32:22-26
ISSN:	1880-9014 0532-8799
Popis:	Effect of heat treatment on the structure of Nickel-base superalloy IN-100 prepared by liquid phase sintering and swaging was investigated.The results obtained were as follows:(1) It was ascertained that the exothermic reaction (1483-1408 K) found during equilibrium solidification is due to the precipitation of γ', and this γ' phase can be dissolved in the same temperature range during heating (the sintered and swaged specimen).(2) Recrystallized grains in the specimen annealed at 1423 K were very fine, because coarse γ' particles remained. While growth of recrystallized grains was observed in the specimen annealed at 1473 K, because most of γ' particles dissolved.(3) The structure formed at grain boundary by incipient melting (1498-1523 K) during sintering process was absorbed into matrix by holding below 1498 K. While the structure changed its composition with holding time at 1513 K, and approached to the equilibrium structure which contained a Zr enriched phase.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c412ebb5628c5df9fb5f6926a202414d https://doi.org/10.2497/jjspm.32.22 Zobrazit plný text záznamu