Snopiński Przemysław, Appiah Augustine Nana Sekyi, Hilšer Ondrej, Kotoul Michal
Department of Engineering Materials and Biomaterials, Silesian University of Technology, 18A Konarskiego Street, 44-100 Gliwice, Poland.
Materials Research Laboratory, Silesian University of Technology, 18A Konarskiego Street, 44-100 Gliwice, Poland.
Materials (Basel). 2022 Nov 10;15(22):7940. doi: 10.3390/ma15227940.
With the aim of improving the excellent mechanical properties of the SLM-produced AlSi10Mg alloy, this research focuses on post-processing using ECAP (Equal Channel Angular Pressing). In our article, two different post-processing strategies were investigated: (1) low-temperature annealing (LTA) and subsequent ECAP processing at 150 °C; (2) no heat treatment and subsequent ECAP processing at 350 °C, 400 °C and 450 °C. The microstructure and mechanical properties of this alloy were analyzed at each stage of post-treatment. Metallographic observations, combined with SEM and EBSD studies, showed that the alloys produced by SLM have a unique cellular microstructure consisting of Si networks surrounding the Al-based matrix phase. Low-temperature annealing (LTA), followed by ECAP treatment, facilitated the microstructural evolution of the alloy with partial breakup of the Si network and observed nucleation of β-Si precipitates throughout the Al matrix. This resulted in a Vickers microhardness of 153 HV and a yield strength of 415 MPa. The main results show that post-processing of SLM-produced AlSi10Mg alloys using ECAP significantly affects the microstructural evolution and mechanical properties of the alloy.
为了改善选择性激光熔化（SLM）制备的AlSi10Mg合金优异的力学性能，本研究聚焦于采用等通道转角挤压（ECAP）进行后处理。在我们的文章中，研究了两种不同的后处理策略：（1）低温退火（LTA），随后在150℃进行ECAP处理；（2）不进行热处理，随后分别在350℃、400℃和450℃进行ECAP处理。在每个后处理阶段对该合金的微观结构和力学性能进行了分析。金相观察结合扫描电子显微镜（SEM）和电子背散射衍射（EBSD）研究表明，SLM制备的合金具有独特的胞状微观结构，由围绕铝基基体相的硅网络组成。低温退火（LTA）后进行ECAP处理，促进了合金的微观结构演变，硅网络部分破碎，并观察到在整个铝基体中β-Si析出相的形核。这导致维氏显微硬度为153 HV，屈服强度为415 MPa。主要结果表明，采用ECAP对SLM制备的AlSi10Mg合金进行后处理显著影响合金的微观结构演变和力学性能。
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