Assessment of tests for use in process and quality control systems for selective laser sintering of polyamide powders
Assessment of tests for use in process and quality control systems for selective laser sintering of polyamide powders
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DOI：
10.1016/j.jmatprotec.2015.10.010
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发表时间：
2016-03-01
影响因子：
6.3
通讯作者：
Pallari, J.
中科院分区：
文献类型：
--
作者：
Akande, S. O.;Dalgarno, K. W.;Pallari, J.
本研究的目的是确定选择性激光烧结聚酰胺粉末时质量保证目的所需的最佳测试集。考虑尼龙11和尼龙12粉末，并评估拉伸、弯曲和冲击性能;以及尺寸精度、密度和熔体流动指数（MFI）。最后得出结论，MFI和强度是关键的措施，与冲击强度的首选强度措施，因为它的实用性。MFI和强度测量可以通过评估特定应用的尺寸精度和密度来增强。除这些措施外的其他测试未提供关于构建输出的机械完整性或尺寸准确性的进一步重要信息。(C)2015 Elsevier B. V.版权所有。
The aim of this study was to identify the optimum set of tests required for quality assurance purposes when selectively laser sintering polyamide powders. Both Nylon 11 and Nylon 12 powders are considered, and-the tensile, flexural and impact properties are assessed; together with dimensional accuracy, density and melt flow index (MFI). It is concluded that MFI and strength are key measures, with impact strength the preferred strength measure because of its practicality. The MFI and strength measures may be augmented by assessment of dimensional accuracy and density for particular applications. Additional testing beyond these measures did not provide further significant information with regard to the mechanical integrity or dimensional accuracy of the output from a build. (C) 2015 Elsevier B.V. All rights reserved.