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- W3095592725 abstract "The as-homogenized Al-5.5 Mg-0.3Mn-0.2Sc-0.1Zr alloy with average grain size of 60 μm and coherent Al3(Sc,Zr) precipitates of 5 nm in diameter was deformed to an accumulative equivalent strain (∑ε) of 7.02 by multi-axial forging (MAF) in channel die at room temperature. The mechanical property and microstructure of the as-homogenized (∑ε = 0), 3rd (∑ε = 2.34), 6th (∑ε = 4.68) and 9th pass (∑ε = 7.02) samples were investigated. Results show that dynamic recrystallization was inhibited due to the pinning effect of AlxMn and Al3(Sc,Zr) precipitates. High density dislocation structure produced a remarkable strain hardening resulting a significant improvement of mechanical property at low equivalent strain (∑ε ≤ 2.34), while, the grain size changed little and the fine-grain strengthening effect was not obvious. Low-angle grain boundaries (LAGBs) formed gradually with increasing of equivalent strain as dislocation recombining, and developed into high-angle grain boundaries (HAGBs), resulting an obvious structure refinement at high equivalent strain. As a combined strengthening effect of strain hardening and grain boundary strengthening, the yield strength (YS) and ultimate tensile strength (UTS) increased to as high as 509 MPa and 597 MPa respectively when equivalent strain reached to 7.02." @default.
- W3095592725 created "2020-11-09" @default.
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- W3095592725 date "2021-01-01" @default.
- W3095592725 modified "2023-10-16" @default.
- W3095592725 title "Microstructural and mechanical behavior of Al-Mg-Mn-Sc-Zr alloy subjected to multi-axial forging at room temperature" @default.
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- W3095592725 doi "https://doi.org/10.1016/j.matchar.2020.110734" @default.
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