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Stress Relaxation Tests: Modeling Issues and Applications in Magnesium Alloys and Composites

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Abstract

The stress relaxation (SR) test during plastic deformation is a useful technique for studying deformation processes. SR tests were performed during plastic deformation of pure magnesium, magnesium alloys and magnesium alloys-based composites over a wide temperature interval from room temperature up to 300 °C. Various theoretical approaches were applied for the estimation of characteristic parameters of thermally activated processes and finding of stress components. The aim of this study was to reveal the main features of deformation processes in hexagonal close-packed magnesium alloys and composites. The role of solute atoms in dynamic strain aging phenomena is discussed. In ultrafine-grained magnesium, grain boundary sliding during the stress relaxation tests was observed. The paper analyzes extensive set of results obtained by authors on cast and processed magnesium materials.

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Acknowledgments

These results were partially achieved with the use of support from the Ministry of Industry and Trade of the Czech Republic in the form of institutional funding.

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Authors and Affiliations

  1. Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Praha 2, Prague, Czech Republic

    Zuzanka Trojanová, Zdeněk Drozd & Pavel Lukáč

  2. ComtesFHT, Průmyslová 996, 334 41, Dobřany, Czech Republic

    Zuzanka Trojanová, Pavel Lukáč & Ján Džugan

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  1. Zuzanka Trojanová
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  2. Zdeněk Drozd
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  3. Pavel Lukáč
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ZT contributed to supervision, investigation, conceptualization, writing—original draft, methodology, writing—review and editing. ZD contributed to investigation, methodology, review and editing. PL contributed to conceptualization, methodology, review and editing. JD ugan contributed to methodology, writing—review and editing.

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Correspondence to Zuzanka Trojanová.

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This invited article is part of a special topical focus in the Journal of Materials Engineering and Performance on Magnesium. The issue was organized by Prof. C. (Ravi) Ravindran, Dr. Raja Roy, Mr. Payam Emadi, and Mr. Bernoulli Andilab, Ryerson University.

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Table 4 Nominal composition (in wt.%) of the alloys studied
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Trojanová, Z., Drozd, Z., Lukáč, P. et al. Stress Relaxation Tests: Modeling Issues and Applications in Magnesium Alloys and Composites. J. of Materi Eng and Perform 32, 2766–2783 (2023). https://doi.org/10.1007/s11665-022-06951-w

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