Systematic studies have been done on two different powder materials used for additive manufacturing: stainless steel and cobalt-chrome. The characterization of these powders is important in NIST efforts to develop appropriate measurements and standards for additive materials and to document the property of powders used in a NIST-led additive manufacturing material round robin. An extensive array of characterization techniques were applied to these two powders, in both virgin and recycled states. The physical techniques included laser diffraction particle size analysis, X-ray computed tomography for size and shape analysis, and optical and scanning electron microscopy. Techniques sensitive to chemistry, including X-ray diffraction, elemental analysis using the X-rays generated during scanning electron microscopy, and X-ray photoelectron spectroscopy, were also employed. Results of these techniques will be used to shed light on the question: how does virgin powder change after being exposed to and recycled from one or more additive manufacturing processes? In addition, these findings can give insight into the actual manufacturing process.
Proceedings Title: Proceedings of QNDE 2013
Conference Dates: July 21-26, 2013
Conference Location: Baltimore, MD
Conference Title: QNDE 2013
Pub Type: Conferences
additive manufacturing, stainless steel, cobalt chrome, characterization, recycling