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Effect of Heat Treatment on Microstructure and Microplasticity of Magnesium Alloys Containing Long-Period Stacking Ordered Structures
Summary
Researchers investigated how heat treatment affects the microstructure and microplasticity of magnesium alloys containing Zn, Y, Gd, Yb, and Zr, with approximately 15% long-period stacking-ordered nanostructured phase, measuring internal friction and elastic modulus amplitude dependences to assess deformation mechanisms.
This study investigates changes in the microplasticity of magnesium alloys containing multiple alloying elements (Zn, Y, Gd, Yb, Zr), which consist of approximately 15% nanostructured phase with a long-period stacking-ordered (LPSO) structure. The amplitude dependences of internal friction and the effective elastic modulus were measured at room temperature (25°C) for both as-cast and aged samples (aged at 200°C for 100 h). The behaviour of these properties at high strain amplitudes was investigated by heating in the temperature range from 25°C to 380°C. The effect of ageing on the time-dependent stress response after high-amplitude deformation was evaluated. The microstructure and phase composition of the samples were further characterised using scanning electron microscopy and X-ray diffraction analysis.
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