Influence of Zr-1 wt.% Nb alloy structure state on its deformation and thermal behavior under quasi-static tension

• Published in: Materials letters 2021-02, Vol.285, p.129028, Article 129028
• Main Authors: Legostaeva, E.V., Sharkeev, Yu.P., Eroshenko, A.Yu, Belyavskaya, O.A., Vavilov, V.P., Skrypnyak, V.A., Ustinov, A.M., Klopotov, A.A., Chulkov, A.O., Kozulin, A.A., Uvarkin, P.V., Skrypnyak, V.V.
• Format: Article
• Language: English
• Subjects: Deformation; Digital image correlation; Digital imaging; Infrared imagery; Infrared imaging; Infrared thermography; Linear functions; Materials science; Mechanical properties; Microhardness; Microstructure; Niobium base alloys; Severe plastic deformation; Structural members; Tensile test; Thermodynamic properties; Thermography; True strain; Ultrafine-grained alloy; Zirconium
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2020.129028

•Influence of structural state on deformation behavior of Zr-1Nb is investigated.•Correlations between the properties and average grain size for Zr-1Nb are obtained.•Results allow to predict deformation behavior of Zr-1Nb with different grain size. The influence of the average size of the structure elements on the deformation and thermal behavior of the Zr-1 wt.%Nb (Zr1-Nb) alloy under quasi-static tension was investigated using the digital image correlation and infrared thermography methods. It is shown that with increasing average size of the structural elements in the range 0.2–2.0 µm the physico-mechanical properties, such as yield strength, microhardness, maximal true strain, and maximal temperature increment during deformation decrease, while longitudinal and transverse strain increase. According to the obtained results, correlations between the mentioned deformation characteristics and the average size of the structural element d–1/2 can be described by linear functions.