Structure Features and Mechanical Properties of Metastable Cu–39.5 wt % Zn (α + β) Alloy with Shape Memory Effect Subjected to Thermomechanical Treatment.

Autor: Svirid, A. E., Pushin, V. G., Kuranova, N. N., Afanasyev, S. V., Davydov, D. I., Stashkova, L. A.
Zdroj: Physics of Metals & Metallography; Aug2024, Vol. 125 Issue 8, p862-869, 8p
Abstrakt: A comprehensive study of structural-phase transformations and physical and mechanical properties of metastable Cu–39.5 wt % Zn α + β alloy with the shape memory effect subjected to thermomechanical treatments including cold rolling and annealing has been carried out. The features of the fine structure formed at the intermediate and bainitic phase transformations have been studied using optical and electron microscopy as well as X-ray phase analysis. The temperature intervals of bainitic 3R/9R and other phase transformations were established by differential scanning calorimetry upon heating up to 500°C. In the case of the hardened alloy, the temperature of the bainitic transformation was close to 170°C. In mechanical tests conducted using uniaxial tension, it has been demonstrated that cold deformation and post-deformation heat treatment under different modes can be employed to obtain the alloy in high-strength or ductile states. These states are characterized by an ultimate strength (σu) greater than 700 MPa and a relative elongation (δ) greater than 40%, respectively. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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