1. Anandh Subramaniam & Kantesh Balani
Mechanical Testing
Uniaxial tension test
Hardness testing
Impact testing
Fatigue testing
Creep testing
MATERIALS SCIENCE
&
ENGINEERING
Anandh Subramaniam & Kantesh Balani
Materials Science and Engineering (MSE)
Indian Institute of Technology, Kanpur
URL: home.iitk.ac.in/~anandh
AN INTRODUCTORY E-BOOK
Part of
A Learner’s Guide
Advanced Reading A E

2. Variables/parameters in mechanical testing
Process parameters (characterized by parameters inside the sample)  Mode of deformation, Sample dimensions, Stress, Strain, Strain Rate, Temperature etc.
Material parameters  Crystal structure, Composition, Grain size, dislocation density, etc.

3. 20 18
stress stn dig for al steel and rubber

4. Data courtesy: Prof. Shashank Shekhar

6. Hardness Test
Hardness tests are perhaps the most easy to conduct and most difficult to interpret (i.e. correlate with other well understood mechanical properties like yield strength & UTS). With the advent of micro/nano-indentation the utility of hardness tests have increased considerably and useful information, way beyond the traditional scope can be obtained.
Broadly there are three kinds of hardness tests (names are in brackets): (i) those which measure resistance to indentation (Vickers, Knoop, Rockwell) (ii) those which measure resistance to scratching (Mohs) (iii) those which measure ability to rebound a indenter (Shore Scleroscope).
The common one used by materials scientists is the one which measures “resistance to indentation”.