Abstract
Lattice structure with high strength and low mass using selective laser melting (SLM) has been a hot topic. However, there are some problems in the fabrication of lattice structure by SLM. Rod unit is the basic component of lattice structure and its performance affects the whole structure. It is necessary to investigate the influence of selective laser melting on rod unit’s mechanical properties. A series of rod units with different inclination angle and diameter were fabricated by SLM in this research. And the mechanical properties of these units were measured by tensile test. The results show that the rod units with different diameters and inclination angles have good mechanical properties and show no difference. It is a good news for lattice structure designing for there is no necessary to consider the mechanical properties’ anisotropy of rod units.
Highlights
In the aerospace, military, automotive, medical and other fields, the significance of the lightweight of components has become more and more important, which can help reduce the amount of spending [1,2]
The results show that the rod units with different diameters and inclination angles have good mechanical properties and show no difference
Each sample was cut into individual tensile specimens by electrical discharge machining for tensile testing
Summary
Military, automotive, medical and other fields, the significance of the lightweight of components has become more and more important, which can help reduce the amount of spending [1,2]. Lattice structure has become a hot spot to study, as it provides good mechanical properties, and greatly reduces the weight of parts [3,4,5,6]. Proven methods of threedimensional lattice structures' manufacturing include Investment casting [7], Deformation forming [8], Woven metal textiles [9], Non-woven metal textiles [9] and so on [10,11]. These methods are complex, costly and low in material utilization [12]. Additive manufacturing technology can shed light on solving this problem [11]
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