Weldability of Ni/sub 3/Al-type aluminide alloys
Conference
·
OSTI ID:6110346
If the ductile Ni/sub 3/Al-based aluminides are to achieve their full potential as engineering materials, they must demonstrate a capability for being joined by conventional welding processes. The goal of this study was to identify some of the factors controlling weldability of the ductile aluminides. The alloys selected for this initial study were boron-doped Ni/sub 3/Al and Ni/sub 3/Al containing 10 at. % Fe. Sheet stock was used to make full penetration autogenous welds by the electron beam and gas tungsten arc processes. The main process variables were travel speed and preheat. The as-welded coupons were examined visually and by normal metallographic methods. Although sound welds were made, initial results indicated weldments of these alloys are susceptible to cracking. Weldability of the ductile Ni/sub 3/Al-based aluminides was found to be affected by alloy composition and welding speed.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6110346
- Report Number(s):
- CONF-841157-78; ON: DE85006932
- Country of Publication:
- United States
- Language:
- English
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