SEDL / STP / STP1175-EB / STP23967S

Influence of Cold Work on the Irradiation Creep and Creep Rupture of Titanium Modified Austenitic Stainless Steel

Garner, FA
Staff Scientist, Battelle Pacific Northwest Laboratories, Richland, Washington

Hamilton, ML
Senior Research Scientist, Battelle Pacific Northwest Laboratories, Richland, Washington

Eiholzer, CR
Senior Engineer, Westinghouse Hanford Company, Richland, Washington

Toloczko, MB
Graduate Student, University of California at Santa Barbara, Santa Barbara, CA

Kumar, AS
Professor, Materials Research Center, University of Missouri, Rolla, Rolla, MO

Pages: 18    Published: Jan 1994

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Abstract

A titanium-modified austenitic type stainless steel was tested at three cold work levels to determine its creep and creep rupture properties under both thermal aging and neutron irradiation conditions. Both the thermal and irradiation creep behavior exhibit a complex non-monotonic relationship with cold work level that reflects the competition between a number of stress-sensitive and temperature dependent microstructural processes. Increasing the degree of cold work to 30% from the conventional 20% level was detrimental to its performance, especially for applications above 550°C. The 20% cold work level is preferable to the 10% level, in terms of both in-reactor creep rupture response and initial strength.