%0 Journal Article
%T 激光粉末床熔融技术成形铝合金缺陷研究<br>Study on the Defects of Aluminum Alloy Formed by Laser Powder Bed Fusion Technology
%A 马成燕
%A 陶双洋
%A 韩璐
%A 屠天涯
%A 杜英奇
%A 赵昕阳
%A 孙金娥
%J Material Sciences
%P 807-814
%@ 2160-7621
%D 2022
%I Hans Publishing
%R 10.12677/MS.2022.128089
%X 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。<br />
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.
%K 铝合金，缺陷，球化，气孔，表面质量，裂纹，几何变形<br>Additive Manufacturing
%K Aluminum Alloys
%K Aerospace
%K Metallurgical Defect
%K Comprehensive Mechanical Property
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=55255