Mechanical characterization of porous structures by the combined use of micro-CT and in-situ loading

摘要：

To link the mechanical properties and failure mechanisms of porous materials to their morphology, the combination of micro-CT and in-situ loading was proposed as characterization technique. This approach allows to quantify the morphology prior and during loading. In this study, a newly designed micro-CT loading stage was validated against a standard mechanical testing device for porous Ti6Al4V structures produced by rapid prototyping with varying pore size and constant strut size. Also, the influence of stepwise loading on the global mechanical properties for these structures was assessed showing that indeed stepwise loading can introduce errors depending on the nature of the structure. Assessment of the morphology and mechanical properties showed no inter-batch variation per design, thus confirming the robustness of the production technique. Finally, stiffness and strength were correlated to the sample volume fraction and correlation functions can be used to tailor the design according to the required mechanical properties.

关键词： porous structures microfocus computed tomography in-situ loading mechanicalproperties

作者: Greet KERCKHOFS Jan SCHROOTEN Laida ELICEGUI Simon VAN BAEL Maarten MOESEN Stepan V. LOMOV Martine WEVERS

作者单位: Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven,B-3001 Leuven, Be Department of Mechanical Engineering, Division of Production engineering, Machine design and Automat

会议类型: 国际会议

会议名称: 第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)

会议地点: 上海

会议语种:英文

页码: 2975-7980

在线出版日期: 2008-10-25（万方平台首次上网日期，不代表论文的发表时间）