14. - 17.11.2017
Frankfurt am Main
Frankfurt am Main
International exhibition and conference on the next generation of manufacturing technologies
Session Materials & Process - Stage 2
14:30 Dr. Neil Harrison, University of Sheffield
Wednesday, 15.11.2017, 14:30 - 15:00 hrs
Department of Mechanical Engineering
As metal AM moves from research and prototyping into industry and production, the impact of high volume productivity is having to be considered. One focus is the adherence of powder to a desired specification to build reliable parts. Although the ambitions of low material waste and high 'buy to fly' ratios are not invalid, the reality is that powder will degrade, and is not infinitely recyclable. The University of Sheffield has been working with industrial partners on developing an understanding of powder degradation, and the impact this has on processing and fabricated parts. Dr Neil Harrison will present results from a comprehensive study in which two alloys were subjected to AM processing and recycling regimes, with powder and parts being assessed for chemical, physical and mechanical properties. Relationships between build number, chemical degradation, tensile strength and fatigue life are revealed, ultimately leading to a discussion on the life of powder in laser powder bed fusion, LPBF.
University of Sheffield, Sheffield, Grossbritannien
Dr Neil Harrison's expertise in metal additive manufacturing includes the development and design of alloys and powders optimised for laser powder bed fusion (LPBF), and spans both research and practical implementation. Neil?s PhD at the University of Sheffield was on solidification, microstructure and material response of nickel superalloys processed by Laser Powder Bed Fusion (LPBF). He also works in industry, using his knowledge of the behaviours of alloys and materials on LPBF systems to provide technical and consultation services. Neil has published works on microstructure and solidification theory in LPBF, and reduction of microcracking in nickel superalloys.