ON THE USE OF X-RAY COMPUTED TOMOGRAPHY FOR MONITORING THE FAILURE OF AN INCONEL 718 TWO-BAR SPECIMEN MANUFACTURED BY LASER POWDER BED FUSION
ON THE USE OF X-RAY COMPUTED TOMOGRAPHY FOR MONITORING THE FAILURE OF AN INCONEL 718 TWO-BAR SPECIMEN MANUFACTURED BY LASER POWDER BED FUSION
复制标题
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
C. Hyde;Z. Xu;A. Thompson;R. Leach;I. Maskery;C. Tuck;A. Clare
中科院分区：
文献类型：
--
作者：
C. Hyde;Z. Xu;A. Thompson;R. Leach;I. Maskery;C. Tuck;A. Clare
增材制造技术具有高度通用性，能够生产具有以前不可能的复杂几何形状的部件。然而，当增材制造用于生产关键应用的零件时，例如在航空航天领域，零件有时会受到机械性能差的限制;这主要是由于孔隙率和材料均匀性低于锻造等效物。本文介绍了一种用于识别材料缺陷（如孔隙率）并在机械试验期间监测这些缺陷向失效方向发展的方法。一个Inconel 718两条试样，由激光粉末床融合，已被施加到一个“阶段”的机械测试，和X射线计算机断层扫描用于测量样品在每个“阶段”结束。X射线计算机断层扫描数据，然后被用来提供故障前的故障部位的历史。
Additive manufacturing technologies are highly versatile, capable of producing components with previously impossible complex geometries. However, when additive manufacturing is used to produce parts for critical applications, such as in the aerospace sector, the parts are sometimes limited by poor mechanical properties; largely as a result of porosity and lower material homogeneity than found in, for example, a wrought equivalent. Presented here is a method for identifying material defects, such as porosity, and for monitoring the progress of these defects towards failure during a mechanical test. An Inconel 718 two-bar specimen, produced by laser powder bed fusion, has been applied to a “staged” mechanical test, and X-ray computed tomography used to measure the sample at the end of each “stage”. The X-ray computed tomography data has then been used to provide a history of failure sites prior to failure.