3D打印和传统生产的SS316L材料的棘轮行为

R. Halama, M. Pagáč, Zbyněk Paška, Pavel Pavlíček, Xu Chen
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引用次数: 7

摘要

研究了常规材料与3D打印材料SS316L的应力应变特性差异。首先,研究了应变速率对单调曲线的影响。采用选择性激光熔化技术制备的试样对应变速率不敏感。在常规生产的SS316L的情况下,循环加载建模必须考虑粘塑性,而不是3D打印材料。对两种生产工艺的试样进行了一组低周疲劳试验。在恒应力幅值和变平均应力条件下实现了单轴棘轮试验。实验结果表明,采用选择性激光熔化技术制备的SS316L具有良好的棘轮耐久性。仅对3D打印的SS316L进行了双轴棘轮试验。应用数字图像相关技术,使每次棘轮试验获得更多的棘轮曲线成为可能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ratcheting Behaviour of 3D Printed and Conventionally Produced SS316L Material
This paper shows some differences in stress-strain behavior of conventional and 3D print SS316L. First, the influence of strain rate on the monotonic curve has been investigated. Specimens produced by Selective Laser Melting technology were not so sensitive to the strain rate. Viscoplasticity has to be taken into account for cyclic loading modelling in the case of conventionally produced SS316L but not for the 3D printed material. A set of low-cycle fatigue tests was performed on specimens from both used production technologies. Uniaxial ratcheting tests were realized under constant amplitude of stress and varying mean stress. Experimental results show a good ratcheting endurance of SS316L produced by the Selective Laser Melting technology. Biaxial ratcheting tests were realized for 3D print SS316L only. Applied Digital Image Correlation technique makes possible to get more ratcheting curves from each ratcheting test.
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