Effect of heat treatment upon the fatigue-crack growth behavior of Alloy 718 weldments

Technical Report · Fri May 01 04:00:00 EDT 1981

DOI:https://doi.org/10.2172/5694025· OSTI ID:5694025

James, L A; Mills, W J

Gas-tungsten-arc weldments in Alloy 718 were studied in fatigue-crack growth test conducted at five temperatures over the range 24--649{degree}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. 23 refs., 9 figs., 6 tabs.

• Research Organization: Hanford Engineering Development Lab., Richland, WA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC06-76FF02170
• OSTI ID: 5694025
• Report Number(s): HEDL-TME-81-12; ON: DE91015593
• Country of Publication: United States
• Language: English

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