Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Mechanical Properties at Nanoscale: Extrinsic and Intrinsic Parameters" By Y. Alexandra Loaiza Lopera Purdue MSE Preliminary Exam Advisor: Professor David Bahr ABSTRACT Strengthening mechanisms in both bulk and nanostructure materials are activated in different way. These mechanisms are revised in this review and the way on how they are activated is also stated. There is a critical value at which it is defined what is bulk and what is nanomaterial, this value has been reported from few nanometers to few micrometers, nevertheless this range is still very broad due the uncertainty on when extrinsic and intrinsic parameters start to operate. In the efforts to assess mechanical properties accurately, nanoindentation have been widely used, given the great capabilities of the tool, however it is still unknown how tests should be performed in order to obtain the most accurate properties of the material. Statistical Nanoindentation Technique (SNT) is presented as a statistical tool to evaluate mechanical properties of heterogeneous materials at nanoscale. This document will layout the challenges of testing nanomaterials particularly nanofoams in which ligament size, chemical composition, relative density and porosity are key features that define microstructure and hence mechanical properties. Date: Wednesday, December 18, 2019 Time: 1:30 P.M. Place: ARMS 1021 School of Materials Engineering Purdue University Neil Armstrong Hall of Engineering 701 West Stadium Ave. Room 2200 West Lafayette, IN 47907 765-494-4105 [PU150]
