Abstract

The effect of small additions of erbium and zirconium on the microstructure, phase composition, kinetics of hardening during aging and softening during annealing after rolling of the Al–5Si–1.3Cu–0.5Mg alloy has been studied in this work. Erbium and zirconium form a phase of crystallization origin with aluminum, silicon, copper, and magnesium, which does not dissolve and does not change its morphology in the process of homogenization before quenching. Erbium and zirconium increase the aging effect after quenching, especially at 210°C, increase the yield stress at elevated temperatures, reduce the tendency to soften during annealing after rolling, and reduce the recrystallized grain size due to dispersoids formed during homogenization. Quenching of deformed sheets with subsequent aging leads to the achievement of slightly lower yield strength than low temperature annealing after rolling. In this case, a significantly higher ultimate strength of 344–375 MPa and ductility of 11.0–14.7% are achieved. The alloy with small additions of zirconium and erbium has higher characteristics of both strength and plasticity.

中文翻译：

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Zr和Er小添加剂对Al-5Si-1.3Cu-0.5Mg合金的相组成和力学性能的影响

摘要

这项工作研究了少量添加和锆对Al-5Si-1.3Cu-0.5Mg合金轧制后的组织，相组成，时效过程中的硬化动力学和时效过程中的软化以及退火过程中的软化的影响。aluminum和锆与铝，硅，铜和镁形成结晶相，该相在淬火前的均质化过程中不会溶解且不会改变其形态。and和锆提高了淬火后的时效效果，尤其是在210°C时，增加了高温下的屈服应力，降低了轧制后退火过程中软化的趋势，并减小了由于均质化过程中形成的弥散体而导致的再结晶晶粒尺寸。相较于轧制后的低温退火，变形钢板的淬火和随后的时效导致屈服强度略低。在这种情况下，可获得344-375 MPa的更高的极限强度和11.0-14.7％的延展性。少量添加锆和的合金具有更高的强度和可塑性。