Remaining Creep or Stress-Rupture Life Under Nonsteady Temperature and Stress

[+] Author and Article Information
B. W. Roberts, F. V. Ellis, J. E. Bynum

Metallurgical and Materials Laboratory, Combustion Engineering, Inc., Chattanooga, Tenn. 37402

J. Eng. Mater. Technol 101(4), 331-336 (Oct 01, 1979) (6 pages) doi:10.1115/1.3443698 History: Received March 30, 1979; Revised July 09, 1979; Online August 17, 2010


This paper presents a historical review of the assessment of remaining creep life for components operating under stress at elevated temperatures. Topics considered in this review include the effects of multiaxial stress state on creep deformation and rupture, empirical methods of summing creep damage, empirical methods of evaluating elevated temperature strength, testing of service exposed material, and microstructural observations of creep damage. While considerable understanding of the damage process has been gained in laboratory testing, only limited success has been attained in quantifying damage of service exposed materials designed to operate in the long time and low stress regime permitted by industrial codes.

Copyright © 1979 by ASME
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