Abstract
The mechanical properties and low-cycle fatigue behavior of the hot-rolled AA2195 Al-Li alloy taken along the longitudinal direction and transverse direction were investigated. The anisotropy ductility of the alloy with the short-term natural aging (T4-SN), long-term natural aging (T4-LN), and T6 artificial aging alloy is mainly related to the grain structure and grain boundaries, whereas the weakened anisotropy of ductility is attributed to the appearance of PFZs. The T4-SN and T4-LN specimens present the cyclic hardening phenomenon due to the interaction of dislocations with dislocations or the Guinier–Preston zone. The cyclic softening phenomenon in T6 specimens is attributed to that the dislocations cut through the T1 precipitates, and some dislocations bypass the non-shearable precipitates, which activates more potential slip systems to shear the T1 precipitates.
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Wang, G., Lin, B., Lu, Dd. et al. Effect of Aging Precipitate on Ductility Anisotropy and Low Cycle Fatigue Behavior of AA2195 Al-Li Alloy. Met. Mater. Int. 29, 2166–2181 (2023). https://doi.org/10.1007/s12540-022-01365-8
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DOI: https://doi.org/10.1007/s12540-022-01365-8