Structure and Property Control through Rapid Quenching of Liquid Metals
Abstract
The report summarizes the results and accomplishments of a three year research program investigating the processing of billets from rapidly quenched liquid metals. Various powder metallurgy (P/M) and quench-casting techniques were employed to generate extremely fine dendrite arm spacings and homogeneous structures. Iron, nickel and cobalt-base alloy powders, produced by steam atomization (coarse powders), argon atomization, vacuum atomization, and the rotating electrode process, were consolidated into dense billets by hot isostatic pressing (HIP) and/or extrusion. The hot working properties of P/M billets quench-cast bars were evaluated by high strain rate tests and creep (superplastic) testing. Two P/M superalloys, MAR-M-509 (cobalt-base) and IN-100 (nickel-base) after HIP and hot extrusion demonstrated excellent hot workability under high strain rate and creep forming conditions. Detailed analyses of microstructures, heat treatments and mechanical properties are presented for all P/M alloys and compared to equivalent cast materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 22, 1973
- Accession Number
- AD0775225
Entities
People
- A. S. Argon
- Merton C. Flemings
- N. J. Grant
- Regis M. Pelloux
Organizations
- Massachusetts Institute of Technology