Recent progress on gas tungsten arc welding of vanadium alloys

Technical Report · Fri Aug 01 04:00:00 EDT 1997

DOI:https://doi.org/10.2172/543202· OSTI ID:543202

Grossbeck, M. L.; King, J. F.; Alexander, D. J. ^[1]

---

1. Oak Ridge National Lab., TN (United States); and others

Emphasis has been placed on welding 6.4 mm plate, primarily by gas tungsten arc (GTA) welding. The weld properties were tested using blunt notch Charpy testing to determine the ductile to brittle transition temperature (DBTT). Erratic results were attributed to hydrogen and oxygen contamination of the welds. An improved gas clean-up system was installed on the welding glove box and the resulting high purity welds had Charpy impact properties similar to those of electron beam welds with similar grain size. A post-weld heat treatment (PWHT) of 950{degrees}C for two hours did not improve the properties of the weld in cases where low concentrations of impurities were attained. Further improvements in the gas clean-up system are needed to control hydrogen contamination.

• Research Organization: Oak Ridge National Lab., TN (United States)
• OSTI ID: 543202
• Report Number(s): DOE/ER--0313/22; ON: DE97008797
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHARPY TEST
DUCTILE-BRITTLE TRANSITIONS
GAS TUNGSTEN-ARC WELDING
PROGRESS REPORT
TEMPERATURE DEPENDENCE
THERMONUCLEAR REACTOR MATERIALS
VANADIUM BASE ALLOYS