Accession Number:

AD0757677

Title:

Structure and Property Control through Rapid Quenching of Liquid Metals

Descriptive Note:

Semi-annual technical rept. no. 5, 31 Jul-31 Dec 1972

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE CENTER FOR MATERIALS SCIENCE AND ENGINEERING

Report Date:

1972-12-31

Pagination or Media Count:

130.0

Abstract:

The processing of billets from rapidly quenched liquid metals was investigated. Various powder metallurgy PM 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 andor extrusion. The hot working properties of PM billets and quench-cast bars were evaluated by hot rolling, high strain rate tests, and creep superplastic testing. Detailed analyses of microstructure, heat treatment, and mechanical properties are presented for all PM alloys and compared to equivalent cast materials.

Subject Categories:

  • Properties of Metals and Alloys
  • Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE