Abstract
V-Nb alloys containing 10–55 wt.% Nb have been tested in an Instron tensile machine at various temperatures from −196°C to 1000°C. In the stress-strain curves obtained, two different kinds of serrated flow are observed in different temperature ranges, depending on the Nb content. Rather coarse serrations with large drops in stress occur not only in the low temperature range −196–200°C but also in the high temperature range 400–700°C. This type of serration is found to be due to deformation twinning. In the high temperature range, relatively fine serrations also appear as a result of dynamic strain-aging effects in the alloys. The relationship between temperature and Nb content for the occurrence of twinning or dynamic strain aging has been determined. Characteristic features of the related mechanical properties of the alloys are described.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
