Abstract Effect of the rare earth (RE) elements and Cu on the microstructure performance and texture of the hot-rolled Al-Mg-Si alloys during the solution and artificial aging was investigated in this study. The results showed that Cube{100}〈001〉 and CubeND{001}〈310〉 textures were suppressed in a certain extent with the Ti/Zr addition, leading the Copper{112}〈111〉 and the {110}〈011〉 textures to be formed; the texture strength of Cube{100} increased with Ce/Er-added, also the F{111}〈112〉 texture was varied, the strength of {110}//ND decreased. The orientation density of the hot-rolled T6 Al-Mg-Si-Cu alloys increased with the Ce/Er addition, the nucleation mechanism of the re-crystallization was the Cube texture, also the nucleation mechanism of the Cube texture and PSN were weaken. Then, the mixed powders of FeCoCrAlCu (high-entropy alloy powder)-MoSi2-Mn-Sb were deposited on the produced hot-rolled Ce/Er modified Al-Mg-Si-Cu alloy substrate by mean of a laser melting deposition (LMD) technique to form the high-entropy alloy composites (HEACs) to improve the surface performance of alloy substrate. Identification of the synthetic ultrafine nanocrystals (UNs) in LMD HEACs contributes theoretical/experimental basis to improve the quality of the laser 3D print materials. The research on the texture of the hot-rolled Al-Mg-Si-Cu alloy also the Co3Mo2Si UNs in laser-treated HEACs can provide the essential theoretical/experimental basis to improve the quality of the light alloys for the automobile parts.

中文翻译：

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轻型汽车零部件用Al-Mg-Si合金的显微组织演变、织构和激光表面HEACs

摘要 本研究研究了稀土(RE)元素和Cu对热轧Al-Mg-Si合金在固溶和人工时效过程中组织性能和织构的影响。结果表明，随着Ti/Zr的加入，Cube{100}〈001〉和CubeND{001}〈310〉织构在一定程度上受到抑制，导致Copper{112}〈111〉和{110}〈011〉要形成的纹理；随着Ce/Er的加入，Cube{100}的织构强度增加，F{111}〈112〉织构也发生变化，{110}//ND的强度降低。热轧T6 Al-Mg-Si-Cu合金的取向密度随着Ce/Er的加入而增加，再结晶的形核机制为Cube织构，Cube织构和PSN的形核机制减弱. 然后，FeCoCrAlCu（高熵合金粉末）-MoSi2-Mn-Sb混合粉末通过激光熔化沉积（LMD）技术沉积在制备的热轧Ce/Er改性Al-Mg-Si-Cu合金基体上形成高熵合金复合材料（HEACs）以改善合金基体的表面性能。LMD HEAC 中合成超细纳米晶体 (UN) 的鉴定为提高激光 3D 打印材料的质量提供了理论/实验基础。对热轧Al-Mg-Si-Cu合金以及激光处理HEAC中Co3Mo2Si UNs的织构进行研究，可为提高汽车零部件轻合金质量提供必要的理论/实验基础。