Laminated intermetallic composites based on nial

Document Type

Article

Publication Date

1-1-1993

Abstract

Laminated intermetallic composites based on NiAl have been fabricated, and their mechanical properties and microstructures have been studied. Composites were prepared by hot isostatic pressing laminates consisting of NiAI powders, and either Ni3Al or IN718 sheets. The sheet materials were introduced as a toughening agent. The microstructures and mechanical properties of the composites were varied by heat treatment Three-point bending tests at room temperature indicated a four-fold improvement in the strength compared to monolithic NiAl, as well as substantial toughness. The composites were significantly less dense than traditional nickel-base alloys, which makes them attractive as potential high temperature structural materials. The strength of the composites was controlled by the NiAl, but the toughness depended strongly on the properties of interfaces and the toughening phases. © 1993, Walter de Gruyter. All rights reserved.

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