Claims
- 1. A Ni3Al alloy having improved welding characteristics comprising:about 6-12 wt % aluminum, about 6-12 wt % chromium, about 0-3 wt % molybdenum, about 1.5-6 wt % zirconium, about 0-0.02 wt % boron, about 0.01-0.30 wt % iron, and at least one of the following being present, about 0-0.15 wt % carbon, about 0-0.20 wt % silicon, and about 0-0.01 wt % sulphur, and balance nickel.
- 2. The Ni3Al alloy according to claim 1 wherein carbon is present within the range of 0.01-0.15 et %.
- 3. The Ni3Al alloy according to claim 1 wherein silicon is present with the range of about 0.01-0.20 wt %.
- 4. The Ni3Al alloy according to claim 1 wherein sulphur is present within the range of about 0.001-0.01 wt %.
- 5. The Ni3Al alloy according to claim 1 comprising:8.32 wt % aluminum, 7.75 wt % chromium, 1.44 wt % molybdenum, 2.00 wt % zirconium, less than 0.001 wt % boron, 0.11 wt % carbon, 0.002 wt % sulphur, 0.07 wt % silicon, 0.29 wt % iron, balance substantially all nickel.
- 6. The Ni3Al alloy according to claim 1 comprising:8.29 wt % aluminum, 7.81 wt % chromium, 1.44 wt % molybdenum, 1.88 wt % zirconium, 0.015 wt % boron, 0.11 wt % carbon, 0.003 wt % sulphur, 0.06 wt % silicon, 0.28 wt % iron, balance substantially all nickel.
- 7. A welded article comprising two segments connected by a weld there between, each segment formed from a Ni3Al alloy comprising:about 6-12 wt % aluminum, about 6-12 wt % chromium, about 0-3 wt % molybdenum, about 1.5-6 wt % zirconium, about 0-0.02 wt % boron, about 0.01-0.30 wt % iron, and at least one of the following being present, about 0-0.15 wt % carbon, about 0-0.20 wt % silicon, and about 0-0.01 wt % sulphur, and balance nickel.
- 8. The welded article according to claim 7 wherein carbon is present within the range of 0.01-0.15 wt %.
- 9. The welded article according to claim 7 wherein silicon is present with the range of about 0.01-0.20 wt %.
- 10. The welded article according to claim 7 wherein sulphur is present within the range of about 0.001-1.01 wt %.
- 11. The welded article according to claim 7 comprising:8.32 wt % aluminum, 7.75 wt % chromium, 1.44 wt % molybdenum, 2.00 wt % zirconium, less than 0.001 wt % boron, 0.11 wt % carbon 0.002 wt % sulphur, 0.07 wt % silicon, 0.29 wt % iron, balance substantially all nickel.
- 12. The welded article according to claim 7 comprising:8.29 wt % aluminum, 7.81 wt % chromium, 1.44 wt % molybdenum, 1.88 wt % zirconium, 0.015 wt % boron, 0.11 wt % carbon, 0.003 wt % sulphur, 0.06 wt % silicon, 0.28 wt % iron, balance substantially all nickel.
- 13. The article according to claim 7 wherein said weld is formed by a gas tungsten arc with a welding electrode comprising nickel, aluminum, zirconium, molybdenum and boron.
Government Interests
The U.S. Government has rights in this invention pursuant to contract No. DE-AC 05-960R22464 between the Department of Energy and Lockheed Martin Energy Research Corporation.
US Referenced Citations (7)