Effect of heat treatment upon the fatigue-crack growth behavior of Alloy 718 weldments. Part I. Macroscopic behavior
Gas-tungsten-arc weldments in Alloy 718 were studied in fatigue-crack growth tests conducted at five temperatures over the range 24 to 649{sup 0}C. In general, crack growth rates increased with increasing temperature, and weldments given the conventional post-weld heat-treatment generally exhibited crack growth rates that were higher than for weldments given the modified (INEL) heat-treatment. Limited testing in the as-welded condition revealed crack growth rates significantly lower than observed for the heat-treated cases, and this was attributed to residual stresses. Three different heats of filler wire were utilized, and no heat-to-heat variations were noted. 9 figures, 6 tables.
- Research Organization:
- Hanford Engineering Development Lab., Richland, WA (United States)
- DOE Contract Number:
- AC06-76FF02170
- OSTI ID:
- 706529
- Report Number(s):
- HEDL-TME--81-12
- Country of Publication:
- United States
- Language:
- English
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