SYMPOSIA PAPER Published: 01 January 1985
STP34523S

Effects of Strain Aging in the Unloading Compliance Test

Source

The behaviors of two heats of SA 515 Grade 70 in the unloading compliance J test were compared. Tensile properties were measured for both heats of material; one heat was found to be susceptible to dynamic strain aging. This heat also exhibited a steeper drop in the slope of the JI-R curve with increasing temperature, and serrated flow during the high-temperature J tests. The magnitude of the serrations varied during each test and with changes in loading displacement rate. Comparison with data from other carbon steels and weld metals showed that a large JIc drop with increasing temperature was associated with a large drop in ductility. J tests of strain-aging susceptible materials also showed a marked decrease in load drop from relaxation and peaks in load upon reloading at temperatures at the lower end of the temperature range of dynamic strain aging.

Author Information

Miglin, MT
Babcock & Wilcox, a McDermott Company, Alliance, OH
Van Der Sluys, WA
Babcock & Wilcox, a McDermott Company, Alliance, OH
Futato, RJ
Babcock & Wilcox, a McDermott Company, Alliance, OH
Domian, HA
Babcock & Wilcox, a McDermott Company, Alliance, OH
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Details
Developed by Committee: E08
Pages: 150–165
DOI: 10.1520/STP34523S
ISBN-EB: 978-0-8031-4923-6
ISBN-13: 978-0-8031-0419-8