THE EFFECTS OF STRAIN RATE AND HYDROGEN CONTENT ON THE LOW TEMPERATURE DEFORMATION BEHAVIOR OF COLUMBIUM
Abstract
The strain rate and temperature dependencies of the low temperature deformation behavior of fine grained arc-melted Nb (1 ppm H) were evaluated for tensile strain rates of 0.005, 0.10 and 6.0 sq. in./min. The effect of H content (1, 9, and 30 ppm H) on the mechanical behavior was also investigated in the temperature range 25 to -195 C, using a tensile strain rate of 0.005/min. The existence of an H-dislocation interaction in Nb was confirmed by: (1) calculation of an apparent activation energy for the early stages of low temperature deformation; (2) observation of an H-induced strain aging peak at -50 C, for Nb containing 30 ppm H; and (3) observation of a serrated stress-strain curve at 25 C in coarse grained Nb containing 89 ppm H. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1961
- Accession Number
- AD0264858
Entities
People
- A.w. Brisbane
- B.a. Wilcox
- R.f. Klinger