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  • Feature Story

Webinar: Powder evolution and its impact on AM production


August 29, 2018

UL and LPW Technology, the market leader in the development, processing and supply of high quality metal powders and powder management products for the AM industry, introduce a new topic in their free webinar series, “Powder evolution and its impact on AM production”.



As the manufacturing landscape for powder bed AM shifts from R&D and prototyping to serial production, more focus is being placed on the reuse of powder. However, metal powder is not infinitely reusable, and there have already been a number of investigations which demonstrate that powder will evolve with repeated reuse. In this webinar we discuss the mechanisms which drive powder evolution and present results from some of LPW’s own powder evolution investigations. Finally, we review the range of work conducted on powder evolution by other investigators and summarise how powder evolution differs across  materials and platforms.


  • Date: Thursday, September 6
  • Duration: 1 hour
  • Time: 11:00am Eastern / 10:00am Central US



  • Mechanisms which drive powder evolution
  • Results from 718 evolution study
  • Introduction of new metric for powder evolution
  • Impact of chemistry variance in virgin powder
  • Factors effective powder evolution
  • Observed defects in powder
  • Review of powder evolution studies

Register Now for this Free Webinar


Dr. Neil Harrison

LPW Materials Development Manager

Dr. Neil Harrison uses his knowledge of the behaviors of alloys and materials on Laser Powder Bed Fusion (LPBF) systems to provide technical and consultation services.  His expertise in metal additive manufacturing includes the development and design of alloys and powders optimized for 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 LPBF.  He has published works on microstructure and solidification theory in LPBF, and reduction of microcracking in nickel superalloys.

Dr. Khalid Rafi

UL AM Lead Development Engineer

Joining UL in 2015, Dr. Khalid Rafi is responsible for the development of AM materials validation and process validation programs at UL’s Global AM Center of Excellence in Singapore. Leveraging his 14 years of experience in teaching and research, Rafi is also engaged in the development and delivery of UL’s AM training program.

Rafi is recognized as one of the few established metallurgists within the AM industry. His research focuses on process optimization, materials characterization and developing structure-property correlations for metallic parts produced using additive manufacturing techniques including selective laser melting (SLM), electron beam melting (EBM) and ultrasonic consolidation (UC).

Rafi holds a Masters and PhD in Materials and Metallurgical Engineering from the Indian Institute of Technology, Madras, India and has earned a post-doctoral fellowship from the University of Louisville, Kentucky, USA and Nanyang Technological University, Singapore.


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