使用回收粉末对铬青铜进行激光粉末床熔融
Laser Powder Bed Fusion of Chromium Bronze Using Recycled Powder.
作者信息
Pelevin Ivan A, Burmistrov Maxim A, Ozherelkov Dmitriy Yu, Shinkaryov Alexander S, Chernyshikhin Stanislav V, Gromov Alexander A, Nalivaiko Anton Yu
机构信息
Catalysis Lab, National University of Science and Technology MISIS, 119991 Moscow, Russia.
Technical Directorate, AddSol Manufacturing Company, 115201 Moscow, Russia.
出版信息
Materials (Basel). 2021 Jun 30;14(13):3644. doi: 10.3390/ma14133644.
Laser powder bed fusion (LPBF) of Cu-0.5Cr was carried out using recycled powder taken out from the LPBF machine after previous printing. Various volumetric defects characterized the powder wherein particle size distribution was the same as virgin powder. Using recycled powder resulted in extra spherical pore formation after the LPBF process. Despite that, a relative density of 99.2% was achieved by LPBF parameters optimization. Solidified microstructure with a small volume of defects consisted of an oversaturated dendritic Cu matrix and nano-sized Cr precipitations providing strengthening mechanism occurrence. The possibility of a satisfactory level of mechanical properties with σ = 136.8 MPa, UTS = 187.4 MPa, along with 15.5% of elongation achieving, was shown.
使用先前打印后从激光粉末床熔融（LPBF）机器中取出的回收粉末对Cu-0.5Cr进行激光粉末床熔融。各种体积缺陷表征了该粉末，其粒度分布与原始粉末相同。使用回收粉末导致在激光粉末床熔融过程后形成额外的球形孔隙。尽管如此，通过优化激光粉末床熔融参数实现了99.2%的相对密度。具有少量缺陷的凝固微观结构由过饱和树枝状铜基体和纳米尺寸的铬析出物组成，这提供了强化机制的发生。结果表明，有可能获得令人满意的力学性能水平，屈服强度σ = 136.8 MPa，抗拉强度UTS = 187.4 MPa，同时伸长率达到15.5%。
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