Abstract A novel Al-14.1Mg-0.47Si-0.31Sc-0.17Zr alloy with a low density of 2.54 g/cm3 and a high tensile strength of 510 MPa was manufactured using selective laser melting (SLM) at 200 W and 500 mm/s. The SLM-processed alloy has the comprehensive characteristics of the 5xxx and 6xxx series Al alloys due to its optimized composition. The formation of equiaxed grains occurred during the SLM process, and the mean grain size was 2.97 μm2 in the as-printed (AP) condition. With a heat treatment (HT) of 325 °C for 4 h, the grain size was nearly unchanged (3.45 μm2), and the tensile strength increased to 571 MPa with the formation of Al3(Sc, Zr) and Mg2Si nanoparticles. This new AlMgSiScZr alloy has promising prospects for replacing some specialized titanium parts in the future.

中文翻译：

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Al3(Sc, Zr)和Mg2Si析出物对激光选区熔化Al-14.1Mg-0.47Si-0.31Sc-0.17Zr合金组织和拉伸性能的影响

摘要 采用选择性激光熔化 (SLM) 在 200 W 和 500 mm/cm2 下制造了一种新型 Al-14.1Mg-0.47Si-0.31Sc-0.17Zr 合金，其密度为 2.54 g/cm3，拉伸强度为 510 MPa s。SLM 处理的合金由于其优化的成分而具有 5xxx 和 6xxx 系列铝合金的综合特性。等轴晶粒的形成发生在 SLM 过程中，在印刷 (AP) 条件下，平均晶粒尺寸为 2.97 μm2。在 325°C 热处理 (HT) 4 小时后，晶粒尺寸几乎没有变化 (3.45 μm2)，随着 Al3(Sc, Zr) 和 Mg2Si 纳米粒子的形成，拉伸强度增加到 571 MPa。这种新的 AlMgSiScZr 合金在未来替代一些特殊的钛零件方面具有广阔的前景。