在过去二十年中,增材制造工艺已广泛应用于许多工业领域的复杂形状部件制造,其主要应用领域之一是航空航天业。激光粉末床熔融技术成形铝合金因其具有极高的强度–重量比以及出色的可加工性,在该领域广泛使用。然而,增材制造工艺对高强铝合金的适用性仍受到缺陷的限制。打印过程中铝合金形成的缺陷主要有球化、气孔、表面质量差、裂纹、几何变形等,这些缺陷严重影响了铝合金组织结构的均匀性与完整性,进而影响其综合力学性能。本文概括了粉末床熔融技术打印铝合金过程中缺陷形成的原因及影响。
In the past two decades, additive manufacturing has been widely applied in the manufacturing of complex shaped parts in many industrial fields, and one of the major application fields is aerospace. Aluminum alloy fabricated by the laser powder bed fusion technology (LPBF) is widely used in this field due to its high strength-weight ratio and excellent machinability. However, the applicability of additive manufacturing to high strength aluminum alloys is still limited by the defects. The defects of aluminum alloy in the LPBF printing process mainly include spheroidization, porosity, poor surface quality, cracks and geometric deformation, etc. These defects seriously affect the uniformity and integrity in the microstructure of aluminum alloy, and then influence its comprehensive mechanical properties. In this paper, the causes and effects of defects in as-printed aluminum alloy by LPBF are summarized.
Study on the Defects of Aluminum Alloy Formed by Laser Powder Bed Fusion Technology
Chengyan Ma, Shuangyang Tao, Lu Han, Tianya Tu, Yingqi Du, Xinyang Zhao, Jin’e Sun*
Tianjin College of Beijing University of Science and Technology, Tianjin
Received: Apr. 11th, 2022; accepted: Aug. 19th, 2022; published: Aug. 26th, 2022
ABSTRACT
In the past two decades, additive manufacturing has been widely applied in the manufacturing of complex shaped parts in many industrial fields, and one of the major application fields is aerospace. Aluminum alloy fabricated by the laser powder bed fusion technology (LPBF) is widely used in this field due to its high strength-weight ratio and excellent machinability. However, the applicability of additive manufacturing to high strength aluminum alloys is still limited by the defects. The defects of aluminum alloy in the LPBF printing process mainly include spheroidization, porosity, poor surface quality, cracks and geometric deformation, etc. These defects seriously affect the uniformity and integrity in the microstructure of aluminum alloy, and then influence its comprehensive mechanical properties. In this paper, the causes and effects of defects in as-printed aluminum alloy by LPBF are summarized.
马成燕,陶双洋,韩 璐,屠天涯,杜英奇,赵昕阳,孙金娥. 激光粉末床熔融技术成形铝合金缺陷研究Study on the Defects of Aluminum Alloy Formed by Laser Powder Bed Fusion Technology[J]. 材料科学, 2022, 12(08): 807-814. https://doi.org/10.12677/MS.2022.128089
参考文献References谌启明, 杨靖, 单先裕, Jan Westerlund. 热等静压技术的发展及应用[J]. 稀有金属与硬质合金, 2003, 31(2): 33-38.Bartkowiak, K., Ullrich, S., Frick, T., et al. (2011) New Developments of Laser Processing Aluminium Alloys via Additive Manufacturing Technique. Physics Procedia, 12, 393-401. <br>https://doi.org/10.1016/j.phpro.2011.03.050王小军. Al-Si合金的选择性激光熔化工艺参数与性能研究[D]: [硕士学位论文]. 北京: 中国地质大学, 2014.Ma, P., Prashanth, K., Scudino, S., Jia, Y., Wang, H., Zou, C., Wei, Z. and Eckert, J. (2014) Influence of Annealing on Mechanical Properties of Al-20Si Processed by Selective Laser Melting. Metals, 4, 28-36.
<br>https://doi.org/10.3390/met4010028Zhang, J., Song, B., Wei, Q., et al. (2019) A Review of Selective Laser Melting of Aluminum Alloys: Processing, Microstructure, Property and Developing Trends. Journal of Materials Science & Technology, 35, 270-284.
<br>https://doi.org/10.1016/j.jmst.2018.09.004关杰仁. 铝合金选择性激光熔化成形工艺控制与组织性能研究[D]:[博士学位论文]. 昆明: 昆明理工大学, 2019.Yadroitsev, I., Gusarov, A., Yadroitsava, I. and Smurov, I. (2010) Single Track Formation in Selective Laser Melting of Metal Powders. Journal of Materials Processing Technology, 210, 1624-1631.
<br>https://doi.org/10.1016/j.jmatprotec.2010.05.010李小平. 超高强铝合金材料的增材制造(3D打印)关键技术研究与应用[R]. 江苏: 江苏理工学院, 2014.吴圣川, 周鑫淼, 张卫华, 余啸, 徐晓波. 激光-电弧复合焊接7075-T6铝合金裂纹扩展分析[J]. 焊接学报, 2013, 34(2): 5-8.陈芙蓉, 李国伟. 7075铝合金的研究现状[J]. 机械制造文摘: 焊接分册, 2019(1): 1-7.高亮, 王广海. 铝合金真空钎焊技术的发展[J]. 科技创新与应用, 2016(14): 166.张唯, 杨孝梅, 蹇海根, 聂伟军, 余泽宇. 选区激光熔化铝合金缺陷影响因素及形成机制[J]. 铸造工程, 2021, 45(6): 20-27.邹田春, 祝贺, 陈敏英, 欧尧. 激光选区熔化成形铝合金的缺陷及控制方法研究进展[J]. 热加工工艺, 2022, 51(1): 1-6, 11.安超, 张远明, 张金松, 吕东喜, 阮亮. 选区激光熔化成型钴铬合金致密度与孔隙缺陷实验研究[J]. 应用激光, 2018, 38(5): 730-737.Han, Q. and Jiao, Y. (2019) Effect of Heat Treatment and Laser Surface Remelting on AlSi10Mg Alloy Fabricated by Selective Laser Melting. International Journal of Advanced Manufacturing Technology, 102, 3315-3324.
<br>https://doi.org/10.1007/s00170-018-03272-y曹龙超, 周奇, 韩远飞, 宋波, 聂振国, 熊异, 夏凉. 激光选区熔化增材制造缺陷智能监测与过程控制综述[J]. 航空学报, 2021, 42(10): 199-233.褚夫众, 张曦, 黄文静, 侯娟, 张恺, 黄爱军. 选区激光熔化铝合金缺陷的形成机制和对力学性能的影响: 综述[J]. 材料导报, 2021, 35(11): 11111-11119.Gwalani, B., Olszta, M., Varma, S., et al. (2020) Extreme Shear-Deformation-Induced Modification of Defect Structures and Hierarchical Microstructure in an Al-Si Alloy. Communications Materials, 1, Article No. 85.
<br>https://doi.org/10.1038/s43246-020-00087-x刘大海, 谢永鑫, 黎俊初. 工艺参数对7075铝合金板材时效成形性的影响[J]. 材料科学与工艺, 2015, 23(3): 50-56.唐浩. 选区激光熔化Al-Mn-Mg-Sc-Zr合金成分设计及性能研究[D]: [硕士学位论文]. 镇江: 江苏科技大学, 2021.傅小明, 杨在志, 孙虎. 材料制备技术与分析方法[J]. 南京: 南京大学出版社, 2020.