Investigation of the Deformation Activation Volume of an Ultrafinegrained Ti50Ni50 Alloy View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2015-10-22

AUTHORS

D. V. Gunderov, A. A. Churakova, A. V. Lukianov, E. A. Prokofiev, S. D. Prokoshkin, A. Yu. Kreizberg, G. I. Raab, I. N. Sabirov

ABSTRACT

The mechanical properties, strain rate sensitivity (m) and deformation activation volume (ΔV) are investigated at the experimental temperatures from 20 to 400°С in a Ti50Ni50alloy in a coarse-grained (CG) state with the austenite grain size D = 200 μm and in an ultrafine-grained (UFG) state with D = 700 μm following an ECAP treatment. It is observed that this treatment improves the yield strength of the alloy compared to its CG-state. The strain rate sensitivity, m, is found to be by a factor of 1.5–2 higher than that of CG-specimens; it increases with the temperature in both states of the material. As the temperature of the material in tension increases up to Т = 150–250°С, parameter ΔV increases to its maximum and with a further growth of the experimental temperature to 400°С, parameter ΔV decreases. The deformation activation volume of the alloy in the UFG-state is by a factor of 2–4 larger than that in the CG-state for the same experimental temperatures. More... »

PAGES

864-868

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11182-015-0583-9

DOI

http://dx.doi.org/10.1007/s11182-015-0583-9

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1008515882


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