|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||A-15: The Effect of Thermal History on Porosity, Surface Feature and Mechanical Properties of LENS Printed Ti-64
||Colleen Hilla, Jakub Toman, Erica Stevens, Qingcheng Yang, Pu Zhang, Albert To, Markus Chmielus
|On-Site Speaker (Planned)
Addictive manufacturing (AM) of metal parts is making the transition from laboratory to industry. Laser engineered net shaping (LENS) is an AM method especially useful for repair purposes. However, the effects of the thermal history on properties of LENS printed samples is little known. In this study, we investigated the effects of the thermal history, varying with print location, on density, porosity distribution, surface features and mechanical properties of LENS printed Ti-64. X-ray micro-computed tomography (microCT), micro hardness, and scanning electron and optical microscopy were performed on several sections (including corner and center line pieces) of a rectangular contour sample (sample without hatching) with fully characterized thermal history. We will present the differences of all investigated properties based on print location. This study will be one part of the basis of a process parameter-microstructure-property model developed to predict and validate LENS printed structures.
||Planned: A print-only volume