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"Nanoindentation Experiments at Elevated Temperatures, High Strain Rates, & Ultra-Low Loads"

MATERIALS  SEMINAR

Department of Materials Science & Engineering
Tuesday December 4, 2018
2:15 – 3:15 ~ SERF 307-Please join us for refreshments at 2:10

"Nanoindentation Experiments at Elevated Temperatures, High Strain Rates, & Ultra-Low Loads"

Speaker: 
Dr. Kurt Johanns-Applications Scientist
KLA-Tencor-Knoxville, TN


Abstract:
A Nanoindenter is an experimental tool designed to test the mechanical integrity, performance, and properties of materials and products.  Similar to a tensile or compression tester, a nanoindenter applies forces to a sample and measures the resulting changes in displacement with the major difference being that the range of forces and displacements is typically microNewtons to milliNewtons and nanometers to micrometers, respectively.  Scientists and engineers have used nanoindenters to study elastic and plastic deformation on a wide range of materials and structures for decades.  In this talk, we will show recent advances that allow for indentation experiments at elevated temperatures, high strain rates, and ultra-low loads.  A brief overview of nanoindenter technology will be provided followed by a discussion on the important experimental aspects of testing at extremes.  Specific examples include: (1) Creep behavior of aluminum as a function of temperature; (2) Hardness of PVD hard coatings at temperature; (3) Impact testing of plastics, metals, and ceramics; and (4) Measurements of elastic modulus below 10nm of indentation depth on reference materials.  As a manufacturer of nanoindentation technology, our goal is to provide scientists with state of the art experimental equipment that aids the characterization of new materials and understanding of fundamental mechanical behavior.  However, when testing at elevated temperatures or high strain rates, it is extremely important to know when and where the assumptions behind the tool and the data interpretation may be suspect.  A discussion of the current limitations and the future of nanoindentation testing will be provided at the end of the talk.
 

Tuesday, December 4, 2018 at 2:10pm to 3:15pm

Science and Engineering Research Facility (SERF), 307
1414 Circle Dr, Knoxville, TN 37996

Event Type

Lectures & Presentations

Topic

Engineering

Audience

Current Students, Faculty & Staff

Tags

MSE Seminar

Department

Materials Science and Engineering

Hashtag

#JohannsSeminar

Contact Name

Ashley Cole

Contact Email

acole14@utk.edu

Contact Phone

865-974-5336

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