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
