COMPARISON OF HIGH ENERGY RATE (DYNAPAK) AND CONVENTIONAL EXTRUSION OF REFRACTORY METALS
A comparison was made of the surface quality, dimensions, chemistry, hardness, tensile properties, and recrystallization behavior of extrusions produced by highvelocity and conventional techniques. Temperatures were established for the development of hot-worked, coldworked, and duplex metallurgical structures for the Mo25W-0.1Zr and W-0.6Nb alloys which were then extruded by both methods at a constant 4 : 1 reduction ratio. The data indicate that equally good surface conditions can be obtained from the two processes if proper lubrication and tooling are used; lower hot working temperatures can be used for high-velocity extrusions; and lower recrystallization temperatures are obtained in material cold worked on a high-velocity machine. The latter fact indicates that high-velocity-extruded metals retain a higher degree of internal stress than do conventional-extruded metals. (auth)
- Research Organization:
- Westinghouse Electric Corp. Materials Mfg. Div., Blairsville, Penn.
- DOE Contract Number:
- AF33(616)-7842
- NSA Number:
- NSA-17-001889
- OSTI ID:
- 4785546
- Report Number(s):
- ASD-TDR-62-506
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- United States
- Language:
- English
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