September 14 @ 11 a.m. – noon
Seminar held in ETRL 101. Refreshments served in ETRL 119 at 10:30 a.m.
Everone is encouraged to attend!
Microstructrual and Morphological Factors Affecting Small-Scale Mechanical Properties
As structures and manufacturing processes become smaller, it is increasingly difficult to measure and understand them. Nanoindentation is a powerful tool for small-scale mechanical measurements. This presentation describes the nanoindentation technique and several reasons why these measurements can be more scattered than those from other mechanical measurement techniques. One source of variation in plastic properties has been found to be the result of dislocation position relative to the sampled volume. Size, orientation, and stochastic yield behavior of the individual grains will also affect properties measurement. Other phenomena such as indentation size effect and yield-point will be explored, and a discussion of how indentation can be useful for characterizing small-scale manufacturing processes such as the thin layers deposited during additive techniques utilizing lasers or electron beams.
Michael R. Maughan is an Assistant Professor of Mechanical Engineering at the University of Idaho. He holds B.S. and M.S. degrees in mechanical engineering, and a PhD. in materials engineering from Purdue University. Michael has worked in industry for both Fortune-50 and startup companies as a mechanical designer and engineering manager, and holds five patents. He is a registered professional engineer in the state of Idaho. His research spans the fields of mechanical and materials engineering, studying the microscale properties, behavior, failure, and manufacture of materials and mechanical systems.