Faculty - Sealy

Michael Sealy, Assistant Professor


Michael Sealy

Michael Sealy
Assistant Professor

Mechanical & Materials Engineering
W306 Nebraska Hall
Office: 402-472-1659
sealy@unl.edu
Sealy's webpage

Research Areas
Laser-based processing, hybrid additive manufacturing, degradable medical devices, surface integrity, corrosion, fatigue, sustainable manufacturing, process signatures in manufacturing

Google scholar page

Research Interests

Dr. Michael Sealy’s research interests is in the area of advanced manufacturing. His research focuses on developing knowledge on the interrelationships between a manufacturing process and a part’s performance. Every manufacturing process has a process signature that serves as a unique identifier. It is quantifiable by electrical energy consumption, acoustic emissions, mechanical forces, or temperature and can be directly correlated to a part’s surface integrity. Surface integrity is the study and control of the surface and subsurface layer and the changes in it that occur during processing. Examples of changes that can occur in parts include the formation of residual stress, increased microhardness, microstructural changes, topographical modifications, etc. Changes to surface integrity influence the performance of finished parts and can be tailored for specific applications.

One project Dr. Sealy is currently working on is the use laser shock peening to control the corrosion rate of biodegradable magnesium implants. His next research objectives are to (1) determine the time at which the mechanical integrity of the implant has degraded via tensile and fatigue testing, (2) determine the manufacturing procedure to produce implants that meet specific patient oriented design constraints, (3) analyze the fatigue life in Hank’s solution to better understand the coupling effect between corrosion and fatigue, (4) in vivo testing to determine more realistic corrosion rates and mechanical properties as well as the interactions over time, and (5) develop a finite element model to investigate the effects of various laser processing conditions on residual stress and topography in order to better predict performance behavior.

Publications

  1. Z.Y. Li, X.T. Wei, Y.B. Guo, M.P. Sealy, 2015, “State-of-art, challenges, and outlook on manufacturing of cooling holes for turbine blades,” Machining Science and Technology. 19, pp. 361-399.
  2. C.H. Fu, M.P. Sealy, Y.B. Guo, 2015, “Finite Element Simulation and Experimental Validation of Pulsed Laser Cutting Nitinol,” Journal of Manufacturing Processes. 19, pp. 81‑86.
  3. D.W. Sun, M.P. Sealy, Z.Y. Liu, C.H. Fu, Y.B. Guo, F.Z. Fang, B. Zhang, 2015, “Finite Element Analysis of Machining Damage in Single-Grit Grinding of Ceramic Knee Implants,” Procedia Manufacturing. (in press)
  4. Z.Y. Liu, M.P. Sealy, Y.B. Guo, Z.Q. Liu, 2015, “Energy Consumption Characteristics in Finish Hard Milling of Tool Steels,” Procedia Manufacturing. (in press)
  5. R. Caslaru, M.P. Sealy, Y.B. Guo, X.T. Wei, 2014, “Fabrication and tribological functions of microdent arrays on Ti-6Al-4V surface by laser shock peening,” ASME J. Manuf. Sci. Eng., 136(5), pp. 051020:1-8.
  6. C.H. Fu, M.P. Sealy, Y.B. Guo, X.T. Wei, 2014, “Austenite-Martensite phase transformation of biomedical Nitinol by ball burnishing,” J. of Materials Processing Technology, 214(12), pp. 3122-3130.
  7. C.H. Fu, Y.B. Guo, M.P. Sealy, 2014, “A predictive model and validation of laser cutting of Nitinol with a novel moving volumetric pulsed heat flux,” J. Mater. Proc. Tech., 214(12), pp. 2926-2934.
  8. Y.B. Guo, M.P. Sealy, C. Guo, 2012, “Significant improvement of corrosion resistance of biodegradable metallic implants processed by laser shock peening,” CIRP Annals – Manufacturing Technology, 61(1), pp. 583-586.
  9. M.P. Sealy, Y.B. Guo, 2011, “Fabrication and characterization of surface texture for bone ingrowth by sequential laser peening biodegradable orthopedic magnesium-calcium implants,” ASME J. Medical Devices, 5(1), 011003, DOI:10.1115/1.4003117.
  10. M.P. Sealy, Y.B. Guo, 2010, “Surface integrity and process mechanics of laser shock peening of novel biodegradable magnesium-calcium (Mg-Ca) alloy,” J. Mech. Behavior of Biomed. Mater., 3(7), pp. 488-496.
  11. R. Caslaru, M.P. Sealy, Y.B. Guo, S.C. Chen, 2009, “Fabrication and characterization of micro dent array produced by laser shock peening on aluminum surfaces,” Trans. NAMRI/SME, 37, pp. 159-166. (NAMRI/SME Outstanding Paper Award).
  12. M.P. Sealy, Y.B. Guo, 2009, “Fabrication and finite element simulation of µ-laser shock peening for micro dents,” Int. J. Comp. Methods Eng. Sci. & Mech., 10(2), pp. 134-142.