【摘 要】
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Conformal cooling coils have been developed during the last decades through the use of additive manu-facturing (AM) technologies.The main goal of this study was to analyze how the presence of an internal channel that could act as a conformal cooling coil
【机 构】
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Department of Applied Science and Technology,Polytechnic University of Turin,10129 Turin,Italy;Cente
论文部分内容阅读
Conformal cooling coils have been developed during the last decades through the use of additive manu-facturing (AM) technologies.The main goal of this study was to analyze how the presence of an internal channel that could act as a conformal cooling coil could affect com-pressive strength and quasi-elastic gradient of A1Si10Mg lattice structures produced by laser powder bed fusion(LPBF).Three different configurations of samples were tested in compression at 25 ℃ and 200 ℃.The reference structures were body centered cubic (BBC) in the core of the samples with vertical struts along Z (BCCZ) lattices in the outer perimeter,labelled as NC samples.The main novelty consisted in inserting a straight elliptical channel and a 45° elliptical channel inside the BCCZ lattice structures,labelled as SC and 45C samples respectively.All the samples were then tested in as-built (AB) condition,and after two post process heat treatments,commonly used for AlSi10Mg LPBF industrial components,a stress relieving (SR) and a T6 treatment.NC lattice structures AB exhibited an overall fragile fracture and therefore the SC and 45C configuration samples were tested only after thermal treatments.The test at 25 ℃ showed that all types of samples were characterized by negligible variations in their quasi-elastic gradients and yield strength.On the contrary,the general trend of stress-strain curves was influenced by the presence of the channel and its position.The test at 200 ℃ showed that NC,SC and 45C samples after SR and T6 treatments exhibited a metal-foam like deformation.
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