THE EFFECTS OF STRAIN RATE AND HYDROGEN CONTENT ON THE LOW TEMPERATURE DEFORMATION BEHAVIOR OF COLUMBIUM. Period covered: December 1959 through December 1960
The strain rate and temperature dependencies of the low temperature deformation behavior of fine grained arcmelted niobium, 1 ppm hydrogen were evaluated for tensile strain rates of 0.005, 0.10 and 6.0 in./in./min. The effect of 1, 9, and 30 ppm H on the mechanical behavior was investigated at 25 to -195 deg C, using a tensile strain rate of 0.005/ min. The existence of a hydrogen-dislocation interaction was confirmed by: calculation of an apparent activation energy for the early stages of low temperature deformation; observation of a hydrogen induced strain aging peak at -50 deg C, for 30 ppm H; and observation of a serrated stressstrain curve at 25 deg C in coarse grained niobium containing 89 ppm H. (auth)
- Research Organization:
- Aeronautical Systems Div. Materials Central, Wright-Patterson AFB, Ohio
- NSA Number:
- NSA-15-032550
- OSTI ID:
- 4837523
- Report Number(s):
- WADD-TR-61-44
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- United States
- Language:
- English
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