columbus · Effect of a Disperse Phase on the Ductile Brittle Transition of Body Centered Cubic Metals

Effect of a Disperse Phase on the Ductile Brittle Transition of Body Centered Cubic Metals

Title: Effect of a Disperse Phase on the Ductile Brittle Transition of Body Centered Cubic Metals
Creator: Evans, P. R. V.
Corporate Author: Armour Research Foundation
Contract: AF 33(616)-6506
DoD Project: 7024(802)
Index In: Materials Research Abstracts: A Review of the Air Force Materials Research and Development (1962), p. 310; U.S. Government Research Reports, Vol. 38, No. 3, p. S-15
Distribution Classification: 2
Report Availability: Not available via Contrails
Abstract: The tensile properties of electron-beam melted columbium and a series of columbium-nitrogen alloys containing up to 0.036w/o nitrogen have been examined at room temperature over a range of grain sizes. The variation of lower yield stress σLY with grain-size d has been used to determine the values of σ0 + kd-1/2. Whereas k was not influenced by nitrogen content and was, with one exception, immeasurably small, σ0 was particularly sensitive to nitrogen content. Some dispersion-hardened structures (Cb2N as dispersed phase) were studied and, employing the Petch equation, a quantitative measure of the contribution of the dispersion to yield strength was made. A measure of the Peierls-Nabarro force for the columbium lattice at room temperature was obtained.
Date: 1962
Extent: 34
Corporate Report Number: ARF-2975-6
Report Number: ARL 62-301
Index Price: $3.60
AD Number: AD-275 118
Type: report
Distribution Conflict: Yes