Purpose

The purpose of this study is to investigate the effect of the strut size and tilt angle on the densification behavior, surface roughness and dimensional accuracy of the selective laser melting AlSi10Mg lattice structure was investigated in this study. In this study, the characteristics such as the density, up-skin and down-skin roughness and dimensional accuracy of selective laser melting forming technology manufacturing (SLMed) AlSi10Mg cellular lattice structure were carried. This work reveals the effect of the strut size and tilt angle on the geometric characteristics of SLMed AlSi10Mg and is benefit for controlling the forming performance of the SLMed cellular lattice structure.

Design/methodology/approach

Based on AlSi10Mg powder, the influence of the tilt angle changed from 10° to 45° with an increment of 5° were investigated, the influence of the strut size was varied from 0.4 mm to 1.2 mm with an increment of 0.2 mm were investigated. The characteristics such as the density, up-skin and down-skin roughness, dimensional accuracy and mechanical properties of SLM-ed AlSi10Mg cellular lattice structure was carried.

Findings

Greater than 99% relative density can be achieved for different strut size when optimal process parameters are used. In the optimized process interval, the struts with a tilt angle of 10° can still be formed well, which is higher than the design limit of the inclined angle given in the related literature. The tilt angle has a significant effect on the surface roughness of the strut. The microhardness reached to 157 ± 3 HV, and the maximum compressive strength was 58.86 MPa, with the optimal process parameters.

Originality/value

In this study, the characteristics such as the density, up-skin and down-skin roughness and dimensional accuracy of SLMed AlSi10Mg cellular lattice structure were carried. With the optimal geometric parameters, the authors tested microhardness and compressive strength of the cellular lattice structure. The results of this study provide theoretical and experimental basis for the realization of high-quality manufacturing and optimization design of aluminum alloy cellular lattice structure, which will meet more diversified industrial needs.

中文翻译：

---

支柱尺寸和倾角对激光选区熔化AlSi10Mg几何特性的影响

目的

本研究的目的是研究支柱尺寸和倾斜角对本研究中选择性激光熔化 AlSi10Mg 晶格结构的致密化行为、表面粗糙度和尺寸精度的影响。本研究承载了选择性激光熔化成形技术制造（SLMed）AlSi10Mg蜂窝晶格结构的密度、上下表层粗糙度和尺寸精度等特性。这项工作揭示了支柱尺寸和倾斜角对 SLMed AlSi10Mg 几何特性的影响，有利于控制 SLMed 蜂窝晶格结构的形成性能。

设计/方法/方法

基于AlSi10Mg粉末，研究了倾斜角从10°变化到45°，增量为5°的影响，支柱尺寸从0.4 mm变化到1.2 mm，增量为0.2 mm的影响进行了研究。承载了SLM-ed AlSi10Mg蜂窝晶格结构的密度、上下表层粗糙度、尺寸精度和力学性能等特性。

发现

当使用最佳工艺参数时，对于不同的支柱尺寸可以实现大于 99% 的相对密度。在优化的工艺区间内，仍能很好地形成倾斜角为10°的支柱，高于相关文献给出的倾斜角设计极限。倾斜角对支柱的表面粗糙度有显着影响。显微硬度达到157±3 HV，最大抗压强度为58.86 MPa，工艺参数最优。

原创性/价值

在这项研究中，携带了 SLMed AlSi10Mg 蜂窝晶格结构的密度、上表和下表粗糙度以及尺寸精度等特性。使用最佳几何参数，作者测试了蜂窝晶格结构的显微硬度和抗压强度。本研究结果为实现铝合金蜂窝晶格结构的高质量制造和优化设计提供理论和实验依据，满足更加多样化的工业需求。