Accession Number : AD0434066

Title :   TIME-TEMPERATURE PARAMETER FOR RUPTURE STRESSES IN NIMONIC 80A AND MONEL, USING MECHANICALCHEMICAL EQUATIONS OF STATE.

Descriptive Note : Technical rept.

Corporate Author : ARMY ENGINEER RESEARCH AND DEVELOPMENT LABS FORT BELVOIR VA

Personal Author(s) : Goldfein,S.

Report Date : 20 JAN 1964

Pagination or Media Count : 23

Abstract : The object of this investigation was to determine if a parameter derived rom a mechanical-chemical equation of state could be used to characterize rupture stresses of alloys previously reported not to have been amenable to analysis with good accuracy by other formulas. Stress-rupture data for Nimonic 80A and Monel were analyzed by making calculations on assumed values of a concentration parameter. A dataplotter was used to draw master rupture curves, and a complete set was obtained in decade intervals. It is concluded that a second-order form of the mechanical-chemical equation of state K = T(22.78 +log at/2) has been found capable of characterizing Nimonic 80A and Monel, two alloys previously reported not to have been analyzable by other parameters. (Author)

Descriptors :   (*NICKEL ALLOYS, RUPTURE), (*RUPTURE, STRESSES), CHROMIUM ALLOYS, COPPER ALLOYS, EQUATIONS OF STATE, TIME, TEMPERATURE, MATHEMATICAL ANALYSIS, NUMERICAL INTEGRATION, EXPERIMENTAL DATA

Distribution Statement : APPROVED FOR PUBLIC RELEASE