Author:
Doherty J. E.,Fornwalt D. E.,Kear B. H.
Abstract
A nickel-base superalloy consists essentially of a Ni/Cr solid solution γ matrix strengthened by the precipitation of the γ' phase, Ni3(Al,Ti). In commercial alloys, transition metal additions are made for solid solution strengthening and C, B and Zr are added to improve grain boundary properties. The carbon reacts to form a variety of carbide phases. (MC, M23C6, M6C and M7C3) depending on composition and heat treatment whereas the B normally reacts to form M3B2-type diborides. In what follows it is shown that in addition to these basic reactions, C and B together can combine with Ti and Nb to form a borocarbide phase. Evidence has also been found for the precipitation of γ within the interdendritic massive γ'.
Publisher
Cambridge University Press (CUP)
Cited by
2 articles.
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1. Precipitation of a New Boride Phase in an Aged Nickel-Base Alloy;Proceedings, annual meeting, Electron Microscopy Society of America;1974-08-15
2. Precipitation of γ in the γ′of nickel-base superalloys;Metallurgical and Materials Transactions B;1974-05