WE Colloquium: Boyd Panton, Laser Processing, Thermomechanical Processing, and Thermomechanical Fatigue of NiTi Shape Memory Alloys

Centre for Advanced Materials Joining

All dates for this event occur in the past.

EJTC 111
1248 Arthur Adams Dr
Columbus, OH 43210
United States

Abstract

NiTi shape memory alloys (SMAs) have revolutionized engineering design across all industries, with major contributions in the medical, aerospace, and automotive industries. These fascinating materials possess the shape memory effect, pseudoelastic effect and biocompatibility, which make them so highly desired. One limitation of NiTi is that standard manufactured products have only one transformation temperature. A highly accurate and repeatable technique was recently developed that uses a high intensity energy source (e.g. laser) to alter the composition of NiTi in localized regions. Laser processing enables the tailoring of different regions of a single piece of NiTi to have different transformation properties. However, there have been no in-depth studies of the evolution of the properties of these laser processed materials over multiple thermal or mechanical cycles. This lack of fundamental knowledge significantly limits both the understanding and possibilities for application of laser processed NiTi. The current study investigated the evolution of the properties of laser processed NiTi wire when the materials were subjected to thermal, mechanical, and thermomechanical fatigue cycling. The knowledge gained was used to identify limitations in the current technology and develop thermomechanical treatments to address these limitations.

Bio

Dr. Boyd Panton earned a PhD in Mechanical Engineering under the supervision of Prof. Norman Zhou at the Centre for Advanced Materials Joining, University of Waterloo, Waterloo, Ontario, Canada. One of his primary research interests is developing welding processes and characterizing the process-structure-properties relationship for advanced materials including shape memory alloys (SMAs), superalloys and ceramics. Joining of SMAs to themselves and dissimilar materials is one of his main focuses. He is particularly interested in characterizing the evolution of the weld and base metal microstructure throughout joining, post-weld thermomechanical processing, and fatigue; including the evolution of grain morphology, crystallographic texture, dislocation networks, phase kinetics and transformations. Dr. Panton has published works with collaborators from Romania, Portugal, and China. His publications include 9 refereed journal papers, 3 conference papers, 5 conference presentations, 1 invited speaker conference presentation, and 3 technical reports/presentations.

Dr. Panton’s previous experience includes being a Research Engineer at both the University of Waterloo and the advanced materials corporation Smarter Alloys Inc., where he worked on projects in the energy, consumer, automotive and medical industries. As part of his role at the University of Waterloo, Dr. Panton mentored 2 undergraduate research assistants, 6 co-op students, 3 MASc students, a PhD student, and 4 visiting scholars and professors. During his time as a research engineer at Smarter Alloys inc. Dr. Panton supported product development and the advancement of fundamental knowledge of the proprietary processes. Dr. Panton was the co-founder and CTO of two start-up companies. The company LabsCubed developed techniques for rapid material characterization to speed up polymer development cycles. The company Executive Solutions Worldwide Corp. focused on bringing cutting edge manufacturing and construction technologies to developing nations to improve their standard of living. Dr. Panton is currently a Process Engineer at Baylis Medical Inc. where he is developing welding processes for surgical tools and training the company in new standards for joining processes and material testing.