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Ken DerraASME (American Society of Mechanical Engineers)
414-259-5794
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ASME - Milwaukee Section Dinner Meeting
January 20, 2016
PRESENTATION TOPIC:
Laser Metal Deposition of Varying Percent of Ti-6Al-4V + Molybdenum on Ti64 Substrate
for Biomedical/Aerospace Applications: Characterization Studies Conducted by MSOE
Seniors in South Africa under the Research Experiences for Undergraduates (REU) Grant
sponsored by the National Science Foundation (Principal Investigator Dr. Kumpaty)
BACKGROUND:
Ti-6Al-4V is a titanium alloy that accounts for about 80% of the titanium market. The Ti-64
alloy contains 6 wt% Aluminum and 4 wt% Vanadium, an almost equal ratio of + phases.
Through the laser surface modification process known as Laser Metal Deposition this alloy
offers the optimum combination of enhanced properties. This research focuses on the application
of adding a combination of molybdenum (Mo) and Ti-64 powders to a Ti-64 substrate surface in
order to improve the durability for various biomedical/aerospace applications. Deposition of the
powders was completed at the CSIR – National Laser Center, in Pretoria, South Africa. The
characterization studies were carried out at the University of Johannesburg. The results of the
hardness tests showed that the addition of molybdenum to Ti-64 increased the hardness of the
deposited material compared to that of the substrate. This verifies that the addition of Mo to
metals can affect the mechanical properties to better suit various applications.
BIOS & RESEARCH SUMMARY:
While Robert Mueller studied the effect of laser power on the properties of laser metal deposited
Ti-6Al-4V + Mo for wear resistance enhancement, Christopher Reynolds investigated scanning
velocity influence on the evolving properties of laser metal deposited Ti-6Al-4V + Mo. The
results of this promising research and various options for further investigation will be discussed
in this talk. The beneficial value of such a global research enterprise on the budding engineers
will be apparent and will draw the audience to inquisitive queries and dialogue.
Dr. Subha Kumpaty is a professor of mechanical engineering at Milwaukee School of
Engineering. He has been engaging undergraduates in research under the NSF sponsored REU
grants for many years. His most recent grant provides MSOE students opportunity to travel to
South Africa and conduct research for six weeks during summer. Robert Mueller and
Christopher Reynolds will present results from the research conducted in summer of 2015. The
excellent support from South African collaborators, Dr. Esther Akinlabi and Dr. Sisa Pityana was
pivotal to the success of our students.
REGISTER:
Please register now by clicking on the Register Now! button below or by calling to Ken Derra at 414-259-5794 by January 14, 2016.