Michigan State University

Science at the Edge

Engineering Seminar

October 19, 2018

11:30 a.m., Room 1400 Biomedical and Physical Sciences Building

Refreshments served at 11:15 a.m.

Mohamed Gebreel

Department of Materials Science and Engineering

Egypt-Japan University of Science and Technology

New Biomedical Ti-Nb-Ta-Zr Alloys Show High Superelasticity

Abstract

Ti-Nb-Ta-Zr alloy system is promising for biomedical applications due its excellent biocompatibility. Achieving high superelastcity in this Ni-free biomedical alloy will widen its application for dental and spinal fixation implants. Here we investigates the effect of Nb, Ta and Zr alterations on the phase stability, cold deformation, and elastic strain recovery of new Ti-Nb-Ta-Zr alloys which were designed along the β/β+ω metastable phase boundary and produced by arc melting. β-phase was predominant in most alloys in the homogenized condition while stress induced martensitic transformation (SIM) were observed during/after cold deformation. Cyclic compression tests were carried out on the alloys and an outstanding combination of strength-elasticity properties was obtained with a relatively low strength of 250MPa for SIM transformation. Unique superelasticity in compression was observed in all the alloys which ranged from 2% - 9.5% that increases with lowering β-phase stability.

Bio

Dr. Gebreel got his PhD from Nagoya University, Japan in 2008. He worked in Nagoya University then Tohoku University, Japan, till 2010 when he moved to E-JUST. He is specialist in alloy design and microstructure control. He worked in developing New generation of Ti-alloys for biomedical applications, Ultra-high strength Ti-alloys, Negative and zero thermal expansion alloys and recently in High entropy alloys. He received the State's Award (Egypt) in Engineering, 2014.  He had 7 funded research projects and more than 80 publications [including filed Patents, Book chapters, Journal papers, and international conferences]

For further information, please contact Prof. Alexandra Zevalkink, Department of Chemical Engineering and Materials Science at [log in to unmask].

Persons with disabilities have the right to request and receive reasonable accommodation. Please call the Department of Chemical Engineering and Materials Science at 355-5135 at least one day prior to the seminar; requests received after this date will be met when possible.

Brad

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Brad Tobin

Chemical Engineering & Materials Science Department

College of Engineering

Michigan State University

428 S Shaw Ln Rm 2100

Engineering Building

East Lansing, MI 48824

Phone: 517-884-7937

Fax: 517-432-1105