Accession Number : AD0758912

Title :   Studies on the Warm Working Characteristics of Alloys.

Descriptive Note : Final rept. 8 Sep 71-7 Dec 72,

Corporate Author : STANFORD UNIV CALIF DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s) : Young,Conrad M. ; Cady,Eldon M. ; Sherby,Oleg D.

Report Date : DEC 1972

Pagination or Media Count : 57

Abstract : EL 304, STRAIN RATEThe deformation of AISI type 304 austenitic stainless steel, Mangalloy (Fe-14% Mn-3%Ni), E-Brite 26-1 (Fe-26%Cr-1%Mo) ferritic stainless steel, 1018 steel containing 0.5%W, and 7075 aluminum has been studied in torsion over a range of deformation conditions representative of 'warm working' (0.4-0.6Tm, where Tm is the melting temperature of the alloy at strain rates from 0.01/s to 6.3/s). The results obtained at the various temperatures and strain rates were analyzed taking into account atom diffusivity and elastic modulus plotting the data as diffusion compensated strain rate versus the modulus compensated stress for each alloy. A clear separation in strength characteristics between the various alloys was obtained when the contribution from dislocation pipe diffusion was included in the diffusion coefficient indicating that diffusion along dislocations is important during warm working. (Author Modified Abstract)

Descriptors :   (*ALLOYS, *HOT WORKING), CREEP, AUSTENITE, STAINLESS STEEL, MANGANESE ALLOYS, ALUMINUM ALLOYS, MICROSTRUCTURE, DEFORMATION, CREEP STRENGTH, STRESSES, TENSILE PROPERTIES, PHASE STUDIES, METALLOGRAPHY

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE