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Study of heat treatment parameters for additively manufactured AlSilOMg in comparison with corresponding cast alloy

机译：增材制造的AlSilOMg与相应铸造合金的热处理参数研究

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摘要

A solution, quenching and ageing heat treatment is often performed on additive manufactured AlSi10Mg parts to dissolve the anisotropy due to the layer-by-layer building.This study investigates the influence of temperature and duration of solution and ageing treatment on microstructure, hardness and density of AlSi10Mg alloy produced by direct metal laser sintering.A parallel investigation is carried out on AlSi10Mg samples produced by gravity casting to analyse the different response to the same heat treatment conditions.The highest hardness, combined with an acceptable increase of porosity, is reached after selected heat treatment parameters. It was also found that, compared to the as-produced condition, this treatment leads to a decrease of ultimate tensile strength, without affecting the yield strength of additive manufactured samples, and reduces the difference in properties along the two building directions. The high properties of the as-produced samples are related to the finer microstructure and, as proved by the differential scanning calorimetric measurements, to the self-quenching phenomenon.
机译：增材制造的AlSi10Mg零件经常进行固溶，淬火和时效热处理，以消除由于层层堆积而引起的各向异性。本研究旨在研究温度和固溶时间以及时效处理对显微组织，硬度和密度的影响。通过直接铸造激光烧结生产的AlSi10Mg合金，对重力铸造生产的AlSi10Mg样品进行了平行研究，以分析在相同热处理条件下的不同响应，在达到最高硬度的同时增加了可接受的孔隙率选择热处理参数。还发现，与所生产的条件相比，该处理导​​致极限抗拉强度的降低，而不会影响添加剂制造的样品的屈服强度，并且减小了沿两个建造方向的性能差异。所生产样品的高性能与更精细的微观结构有关，并通过差示扫描量热法测量证明与自猝灭现象有关。

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