Influence of hard inclusion on Bauschinger effect and cyclic deformation behavior: an atomistic simulation on single-crystal and polycrystal aluminum

A Rajput and SK Paul, MATERIALS TODAY COMMUNICATIONS, 34, 105126 (2023).

DOI: 10.1016/j.mtcomm.2022.105126

This paper examined the Bauschinger effect in single-crystal (SC) and polycrystal (PC) aluminum (Al). The effect of hard Ti inclusion has also been analysed on both systems considering the case of the Bauschinger effect. The reversibility effect of 1/6 < 112 > partial dislocation and reduction in defect densities such as dislocations annihilations, stacking fault, and twin are found in the stress reversal in Al. It has been noted that the Bauschinger effect is the consequence of the reversibility effect of 1/6 < 112 > partial dislocation and reduction in defect densities during unloading in Al. Additionally, the development of residual strain has been observed during unloading in PC Al which significantly affects the Bauschinger effect. The presence of inclusion considerably affects the Bauschinger effect in SC Al concerning PC Al. To quantify the Bauschinger effect in various systems, the back stress parameter is calculated, which reveals hard Ti inclusion substantially influences the Bauschinger effect in Al.

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