Accession Number:

AD0005978

Title:

CREEP CORRELATIONS OF METALS AT ELEVATED TEMPERATURES-AND APPENDIX- SERIES NO. 22, ISSUE NO. 25

Descriptive Note:

Corporate Author:

CALIFORNIA UNIV BERKELEY MATERIALS RESEARCH LAB

Report Date:

1953-03-01

Pagination or Media Count:

44.0

Abstract:

Creep and tensile data of pure metals above 0.45 times the melting temperature are correlated by using the equations epsilon ft e -DeltaHRT, delta and delta fepsilon sub s e DeltaHRT where epsilon is the creep, t is the test time, DeltaH is the creep-activation energy, R is the gas constant, T is the absolute temperature, delta is the applied stress, and epsilon s is the secondary creep rate. These parameters were applied successfully to creep and tensile data for Pt, Ni, Cu, Au, Al, Pb, Fe, and Zn as well as to solid-solution alloys. The quantity DeltaH was a constant for a given metal and was equal to the self-diffusion activation energy for a given metal. In addition, DeltaH was a periodic function of the atomic number.

Subject Categories:

  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE