Effect of build orientation and surface finish on surface resistance in microwave components produced by Selective Laser Melting
Effect of build orientation and surface finish on surface resistance in microwave components produced by Selective Laser Melting
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构建方向和表面光洁度对选择性激光熔化生产的微波组件表面电阻的影响
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
A. Porch
中科院分区：
文献类型：
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作者：
N. Clark;Samuel Hefford;A. Porch
从微波的角度比较了由选择性激光熔化产生的许多金属表面。在两个正交构建方向上用铝（Al10 SiMg）、钛（Ti6 Al4V）和钴Chrome合金生产试样，其中一半进行喷砂处理。在5.7 GHz的表面电阻测量使用的“剥离”介电谐振器的方法。的损失进行了比较，从阻力轮廓测量粗糙度。微波损耗被发现不是单调地依赖于均方根表面粗糙度，这是由于不同的尺寸分布的粗糙度功能。喷砂处理样品通常会降低其表面电阻，但在垂直生产的表面上效果更为显著。这些结果对微波应用中使用的部件具有重要意义。
A number of metal surfaces, produced by Selective Laser Melting, have been compared from a microwave perspective. Test pieces were produced in Aluminium (Al10SiMg), Titanium (Ti6Al4V) and Cobalt Chrome in two orthogonal build orientations, half of which were grit blasted. Surface resistance measurements at 5.7 GHz were taken using a “lift-off” dielectric resonator method. The losses were compared with roughness measurements from drag profilometry. Microwave losses were found not to monotonically depend on root-mean-square surface roughness, which was attributed to the different size distributions of roughness features. Grit blasting a sample typically reduced its surface resistance but the effect was much more significant in vertically produced surfaces. These results have major implications for parts used in microwave applications.