Ghio Emanuele, Cerri Emanuela
Department of Engineering and Architecture, University of Parma, 43124 Parma, Italy.
Materials (Basel). 2022 Mar 10;15(6):2047. doi: 10.3390/ma15062047.
Laser powder bed fusion (L-PBF) is an additive manufacturing technology that is gaining increasing interest in aerospace, automotive and biomedical applications due to the possibility of processing lightweight alloys such as AlSi10Mg and Ti6Al4V. Both these alloys have microstructures and mechanical properties that are strictly related to the type of heat treatment applied after the L-PBF process. The present review aimed to summarize the state of the art in terms of the microstructural morphology and consequent mechanical performance of these materials after different heat treatments. While optimization of the post-process heat treatment is key to obtaining excellent mechanical properties, the first requirement is to manufacture high quality and fully dense samples. Therefore, effects induced by the L-PBF process parameters and build platform temperatures were also summarized. In addition, effects induced by stress relief, annealing, solution, artificial and direct aging, hot isostatic pressing, and mixed heat treatments were reviewed for AlSi10Mg and Ti6AlV samples, highlighting variations in microstructure and corrosion resistance and consequent fracture mechanisms.
激光粉末床熔融（L-PBF）是一种增材制造技术，由于能够加工诸如AlSi10Mg和Ti6Al4V等轻质合金，该技术在航空航天、汽车和生物医学应用领域正越来越受到关注。这两种合金的微观结构和机械性能都与L-PBF工艺后所采用的热处理类型密切相关。本综述旨在总结不同热处理后这些材料的微观结构形态及相应机械性能方面的研究现状。虽然后处理热处理的优化是获得优异机械性能的关键，但首要要求是制造出高质量且完全致密的样品。因此，还总结了L-PBF工艺参数和构建平台温度所产生的影响。此外，针对AlSi10Mg和Ti6AlV样品，综述了去应力、退火、固溶、人工时效和直接时效、热等静压以及混合热处理所产生的影响，突出了微观结构和耐腐蚀性的变化以及相应的断裂机制。
