@article{Kim2024, 
author = {Hyun Ji Kim and Sang Cheol Jin and Sumi Jo and Sung Hyuk Park},
title = {Effect of pre-deformation on precipitation behavior of AZ80 alloy: Comparison of slip- and twinning-dominant deformation},
year = {2024},
journal = {Journal of Magnesium and Alloys},
volume = {12},
number = {9},
pages = {3616-3630},
keywords = {AZ80 alloy, Slip, Twinning, Precipitation, Hardness},
url = {https://www.sciopen.com/article/10.1016/j.jma.2024.09.001},
doi = {10.1016/j.jma.2024.09.001},
abstract = {This study investigates the effect of the deformation mode on the precipitation behavior of an extruded Mg–8.0Al–0.5Zn–0.2Mn (AZ80) alloy. The alloy samples are compared after the application of 3.5% tension and 3.5% compression along the extrusion direction to induce slip-dominant and twinning-dominant deformation modes, respectively. The pre-compressed (PC) sample, which contained numerous {10–12} tension twins, has a reduced grain size and a higher internal strain than the pre-tensioned (PT) sample, which is attributed to the inherent internal strain that occurs during the formation and growth of the twins. As a result, the precipitation behavior of the PC sample is accelerated, leading to its short peak aging time of 32 h, which is lower than those of the PT and as-extruded samples (48 and 100 h, respectively). Furthermore, fine continuous precipitates (CPs) rapidly form within the {10–12} twins, contributing to the enhanced hardness. Discontinuous precipitates (DPs), which have a hardness comparable to the CP-containing twinned regions, in the PC sample experience less coarsening during aging than those in the PT sample due to growth inhibition by the {10–12} twins. Ultimately, the {10–12} twins generated under the twinning-dominant deformation condition lead to enhanced precipitation behaviors, including the preferential formation and refinement of CPs and the suppressed coarsening of DPs. Consequently, pre-deformation that occurs {10–12} twinning exhibits more pronounced effects on precipitation acceleration and microstructural modification than slip-inducing pre-deformation.}
}