The asymmetric pre-yielding behaviour during tension and compression for a rolled AZ31 Mg alloy

Zhu, Guoguo; Yang, Chong; Ge, Shenguang; Peng, Yan; Shi, Baodong

doi:10.1007/s12289-022-01683-7

Cited by 6 publications

(2 citation statements)

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“…Extensive studies have been devoted to uncovering the underlying mechanisms related to deformation behavior affecting the design of magnesium alloy structural parts. One of the important characteristics for the accurate design of magnesium structural components is the inelastic behavior, which refers to the non-linear relationship between stress and strain during the unloading process [3][4][5]. This inelastic behavior has a significant impact on the key properties of magnesium alloy structures, for instance, damping coefficients, apparent elastic constants, spring back, and the fatigue property [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…De-twinning may take place upon loading reversal after twinning [9], which was also ascribed to be partially responsible for the inelastic behavior during unloading [10]. Noteworthy inelastic strains have been observed during unloading of Mg and its alloys [3,4,11]. Gharghouri et al [11] ascribed the inelastic behavior to both deformation mechanisms of extension twin and slip mechanisms.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Internal Elastic Strains of AZ31B Plate during Unloading at Twinning-Active Region

Zhou

Zhang

et al. 2023

Metals

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Magnesium alloys, being the lightest structural metals, have garnered significant attention in various fields. The characterization of inelastic behavior has been extensively investigated by researchers due to its impact on structural component performance. However, the occurrence of twinning in the absence of any applied driving force during unloading has lacked reasonable explanations. Moreover, the influence of deformation mechanisms other than twinning on inelastic behavior remains unclear. In this study, uniaxial tension and compression tests were conducted on hot-rolled magnesium alloy plates, and neutron diffraction experiments were employed to characterize the evolution of macroscopic mechanical response and microscopic mechanisms. Additionally, a twinning and detwinning (TDT) model based on the elastic visco-plastic self-consistent (EVPSC) model has been proposed, incorporating back stress to describe the deformation behavior during stress relaxation. This approach provides a comprehensive understanding of the inelastic behavior of magnesium alloys from multiple perspectives and captures the influence of microscale mechanisms. A thorough understanding of the inelastic behavior of magnesium alloys and a reasonable explanation for the occurrence of twinning under zero-stress conditions offer valuable insights for the precise design of magnesium alloy structures.

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