Influence of laser power during laser powder bed fusion on the structure and properties of Al-40Sn alloy prepared from a mixture of elemental powders

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-01-31 DOI:10.1016/j.jallcom.2025.178648

N.M. Rusin, K.O. Akimov, A.L. Skorentsev, A.I. Dmitriev

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Abstract

The work examines structural features of Al-40Sn alloy produced by Laser Powder Bed Fusion (LPBF). The alloy is synthesized from a mixture of commercial powders of ASD-1 grade aluminum and PO 2 grade tin. The power of the laser beam (P) varies from 30 to 170 W in steps of 20 W, and the beam scanning speed is 1200 mm/s. The macroscopic structure of the synthesized specimens is represented by layers of different thicknesses, which are composed of large regions with thin tin-rich boundaries. These regions, in turn, consist of smaller regions differing in the orientation of the constituent Al dendrites, which are separated by thin tin interlayers. With increasing laser power, aluminum grains and their tin interlayers grow in size from 3–5 μm to 10–15 μm at P ≥ 130 W. Coarsening of the alloy structure causes a slight decrease in strength and an increase in ductility. The compression strength of the synthesized Al-40Sn alloy is 90–102 MPa.

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激光粉末床熔合过程中激光功率对混合元素粉末制备Al-40Sn合金结构和性能的影响

研究了激光粉末床熔合Al-40Sn合金的组织特征。该合金是由ASD-1级铝粉和PO - 2级锡粉的混合物合成的。激光束功率(P)在30 ~ 170 W之间变化，步长为20 W，扫描速度为1200mm /s。合成试样的宏观结构表现为不同厚度的层状结构，这些层状结构由具有薄富锡边界的大块区域组成。这些区域依次由Al枝晶取向不同的小区域组成，这些小区域被薄锡夹层隔开。当P≥130 W时，随着激光功率的增加，铝晶粒及其锡中间层的尺寸从3 ~ 5 μm增大到10 ~ 15 μm。合金组织的粗化导致强度的轻微下降和延展性的增加。合成的Al-40Sn合金抗压强度为90 ~ 102 MPa。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.