>> Congratulations to Vivek Srinivas!

Vivek received a Best Poster Award at the annual MAE Graduate Research Day.

Vivek’s poster presented his research on automotive safety systems, exploring smart reversible mechanical latching systems toward securing vehicle occupants in unconventional and severe loading conditions where conventional restraints provide insufficient protection. The work is supported by Autoliv and Honda within the NSF IUCRC Smart Vehicle Concepts Center.

MAE Research Day allows Department of Mechanical and Aerospace Engineering students to present their research to a broad audience consisting of prospective graduate students, current OSU students, faculty, and staff. This is a joint activity hosted by the Department of Mechanical and Aerospace Engineering and the Mechanical and Aerospace Engineering Graduate student Association (MEGA). The event was held October 28, 2022 in Scott Laboratory.

The top three out of fifty poster presenters receive funding to use for professional development or travel reimbursement to participate in conferences related to their research and also receive credit for one research seminar.

Vivek is a doctoral student in the Smart Materials and Structures Lab; he is advised by Prof. Marcelo Dapino.

Well done, Vivek!

>> “Strengthening of pretreated aluminum during ultrasonic additive manufacturing” published in Additive Manufacturing

Click for PDF of full paper


Strengthening effects in materials bonded by the high strain rate plastic deformation process, Ultrasonic Additive Manufacturing (UAM), were investigated. Aluminum (Al 6061) was pretreated by tempering and annealing prior to bonding through UAM. Following UAM, multiscale material characterization was performed. Tensile testing in the rolling (x) direction demonstrated the material became harder after the UAM process, and nanoindentation demonstrated the foil-foil interfaces became harder than the bulk foil material. The strengthening effects are a result of microstructure changes at the interfaces and in the bulk foil regions which were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and energy dispersive spectroscopy. These microstructure changes result from dynamic recrystallization, dynamic recovery, adiabatic heating, and precipitate dissolution. This study signifies the metallurgical features creating mechanical strength increases, rather than decreases, in UAM builds.


M. Pagan, N. ZHAO, L.M. Headings, M.J. Dapino, S. Vijayan, J.R. Jinschek, S.J. Zinkle, and S.S. Babu, “Strengthening of pre-treated aluminum during ultrasonic additive manufacturing,” Additive Manufacturing, Vol. 60, Pt. A, 2022, 103228. https://doi.org/10.1016/j.addma.2022.103228