DTIC AD0775225: Structure and Property Control through pdf

DTIC AD0775225: Structure and Property Control through

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Description of the Book:

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

• Creator/s: Defense Technical Information Center
• Date: 6/22/1973
• Year: 1973
• Book Topics/Themes: DTIC Archive, Grant, N J, MASSACHUSETTS INST OF TECH CAMBRIDGE CENTER FOR MATERIALS SCIENCE AND ENGINEERING, *HOT PRESSING, *QUENCHING, *POWDER METALLURGY, THERMOMECHANICS, MECHANICAL PROPERTIES, MICROSTRUCTURE, ISOSTATIC PRESSING, SOLIDIFICATION, ALLOYS, STEEL, COPPER, NICKEL ALLOYS, COBALT ALLOYS, LIQUID METALS, ATOMIZATION, MARAGING STEELS

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