Article ID Journal Published Year Pages File Type
1576747 Materials Science and Engineering: A 2012 5 Pages PDF
Abstract

Nickel-base superalloy foams were created by a casting replication technique where a lightly sintered preform of SrF2 was pressure infiltrated with molten IN792; after solidification of the composite, the salt phase was dissolved with HCl to create 65% open porosity. Room temperature yield strength and stiffness of the IN792 foam compared well with existing models. Monolithic and foam samples were tested under creep conditions at 750 and 850 °C at stresses ranging from 5 to 40 MPa for the foams and from 150 to 650 MPa for the monolithic alloy. Both exhibited power-law creep behavior at high stresses and a transition to viscous flow at lower stresses, which was modeled using equations for dislocation and diffusional creep.

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Physical Sciences and Engineering Materials Science Materials Science (General)
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