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Use of Ultimate Tensile Strength to Correlate and Estimate Creep and Creep-Rupture Behavior of Types 304 and 316 Stainless Steel

Technical Report ·
DOI:https://doi.org/10.2172/7087796· OSTI ID:7087796
 [1];  [1];  [1]
  1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Elevated-temperature tensile and creep properties of several heats of types 304 and 316 stainless steels were used to show that the short-term ultimate tensile strength of a given heat at the creep-test temperature and at a fixed strain rate can be used as an index for correlating and predicting creep and creep-rupture behavior. The short-term elevated-temperature ultimate tensile strength helps to account for changes in creep properties due to test temperature as well as due to heat-to-heat variations. Generalized models of time to rupture and minimum creep rate were defined in terms of stress, temperature and ultimate tensile strength. Ultimate tensile strength was used in a creep equation to predict the strain-time behavior of individual heats. Several possible reasons are presented for the observed relationships between the short-term ultimate tensile strength and the long-term creep properties. Design and materials engineering implications of the observed relationships between short-term elevated-temperature ultimate tensile strength and creep properties are also discussed.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725; W-7405-ENG-26
OSTI ID:
7087796
Report Number(s):
ORNL--5285
Country of Publication:
United States
Language:
English