WELDING OF ZIRCONIUM-2.5 w/o NIOBIUM AND ZIRCONIUM-3.0 w/o ALUMINUM-0.5 w/o MOLYBDENUM ALLOYS [electronic resource]
Saved in:
| Online Access: |
Online Access |
|---|---|
| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Oak Ridge, Tenn. : Oak Ridge, Tenn. :
U.S. Atomic Energy Commission. Division of Technical Information. ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1962.
|
| Subjects: |
| Abstract: | The high-strength Zr alloys Zr--2.5 w/o Nb and Zr--3.0 w/o Al--0.5 w/o Mo were welded under various atmospheres, and the welds were evaluated by nondestructive testing, chemical analysis, metallographic examination, and tensile testing at room temperature and 315 deg C. The Zr--Nb welds were also evaluated by corrosion testing in 360 deg C water after various heat treatments and surface treatments before and after welding. In addition, the welding of Zr--2.5 Nb to Zircaloy-2 was investigated. The alloys are readily weldable by the inert W-arc welding process and although the weld-shielding atmosphere has no apparent effect on the mechanical properties of the welds, the corrosion resistance of the Zr--Nb alloy is affected. The best corrosion resistance is obtained with the highest purity, gas-shielding conditions. Vapor blasting and pickling after welding resulted in some improvement in corrosion resistance of welds made under the various atmospheres. Heat treating after welding followed by vapor blasting and pickling improves the corrosion resistance of the Zr--Nb alloys. The corrosion resistence of the heat-affected zone is impaired in the Zr --Nb material, whether welded, as received, or heat-treated. A complete solution and aging treatment would probably be required to restore the corrosion resistance. Welding in a pre-evacuated box (0.01 mu ), back-filled with purified Ar, is considered to be more suitable for the welding of thick sections or complicated shapes of Zr--Nb and Zr--Al --Mo alloys. (auth) |
|---|---|
| Item Description: | Published through SciTech Connect. 06/29/1962. "aecl-1610" " cw-r&" "dl-29" Lavigne, M.J. Canadian Westinghouse Co., Ltd., Atomic Energy Div., Hamilton, Ontario (Canada) Atomic Energy of Canada (AECL), Chalk River, Ontario (Canada) |
| Physical Description: | Pages: 55 : digital, PDF file. |