Superplasticity of a multiphase Ni-25Al-25Cr intermetallic alloy

Journal Article · Fri Dec 18 04:00:00 EST 1998 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(98)00421-7· OSTI ID:328258

Chen, R S ^[1]; Guo, J T; Yin, W M ^[1]; Zhou, J Y ^[2]

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1. Chinese Academy of Sciences, Shenyang (China). Dept. of Superalloys and Intermetallics
2. Dalian Univ. of Technology (China). Dept. of Materials Engineering

In the past decade significant improvement in high temperature strength, processing and design methodology for NiAl have been achieved. However, limited ductility and toughness as well as poor impact resistance continue to be critical issues which will impede near term production implementation. The most recent work on NiAl suggests that the room toughness of NiAl can be conveniently improved in-situ with refractory metal phases by directional solidification of pseudo-binary (e.g., NiAl-Cr) and -ternary(NiAl-Cr(Mo)) eutectic systems. Since it has been well established that the majority of eutectic alloys, such as Al-Cu, Al-Si and Al-Al{sub 3}Ni, display superplasticity under appropriate conditions, their enthusiasm for exploring whether the multiphase Ni-25Al-25Cr alloy, containing a ternary eutectic of {beta}Ni(Al,Cr) + {gamma}{prime}Ni{sub 3}(Al,Cr) is appropriate.

• OSTI ID: 328258
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 2 Vol. 40; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
EUTECTICS
INTERMETALLIC COMPOUNDS
NICKEL ALLOYS
PLASTICITY