L5 SELECTION AND DEVELOPMENT OF MATERIAL TESTING

1. OML751 TESTING OF MATERIALS
OML751 TESTING OF MATERIALS
M.KARTHIKEYAN
ASSISTANT PROFESSOR
DEPARTMENT OF MECHANICAL ENGINEERING
AAA COLLEGE OF ENGINEERING & TECHNOLOGY, SIVAKASI
karthikeyan@aaacet.ac.in

2. UNIT I INTRODUCTION TO MATERIALS TESTING
1. Introduction
2. Overview of materials
3. Classification of material testing
4. Purpose of testing
5. Selection & Development of material testing
6. Testing organizations and its committee
7. Testing standards
8. Result Analysis
9. Advantages of testing.

3. Material
Testing
Services
Description Applications
Mechanical
Testing
Mechanical testing often
includes mathematical
models and small scale
stress test experiments
to simulate real life
examples.
Used to estimate how
much stress the
material will
experience and what
materials meet those
specifications.

4. Material
Testing
Services
Description Applications
Non-
Destructive
Testing
Non-destructive testing
(NDT) examines materials
without impairing their
future usefulness.
NDT is done in many
industries from
automotive to
construction.

5. Material
Testing
Services
Description Applications
Microscopy Microscopy uses
instruments such as
optical and electron
microscopes to study the
structure and
composition of materials.
Used to perform
isotope dating and
tracking, trace gas
analysis,
pharmacokinetics, and
protein
characterization.

6. Material
Testing
Services
Description Applications
Scanning
Electron
Microscopy
A scanning electron
microscope (SEM) is an
electron microscope that
produces images by
scanning a sample with
electrons. An image is
produced that shows the
topography of the
sample.
Used to observe the
distribution of
different elements in a
sample. SEM provides
very detailed images of
the surface of the
sample.

7. Material
Testing
Services
Description Applications
Mass
Spectroscopy
Chemical analysis with
inductively coupled
plasma spectroscopy
(ICP) excites atoms for
atomic emission
spectroscopy and ionizes
atoms for mass
spectrometry.
Used to identify
isotopic composition
of elements within a
sample, gas analysis,
pharmacokinetics, and
protein
characterization.

8. Material
Testing
Services
Description Applications
X-Ray
Fluorescence
X-Ray fluorescence is the
emission characteristic
“secondary” X-rays from
a material that has been
bombarded with high-
energy X-rays.
Use for elemental and
chemical analysis in
the investigation of
metals, glass,
ceramics, and building
materials.

9. Material
Testing
Services
Description Applications
Inductively
Coupled Plasma
Inductively coupled
plasma is achieved by
ionizing the sample with
the plasma and the using
a mass spectrometer to
separate and qualify the
ions.
Used to detect metals
and non-metals at
concentrations as low
as one part per trillion.

10. Material
Testing
Services
Description Applications
Diffraction A light source (i.e. laser)
to diffract the light off
the various grains in the
material. From the
pattern, the diameter of
the grains can be
determined.
Diffraction evaluates
crystal structure, grain
size, texture and/or
residual stress.

11. Material
Testing
Services
Description Applications
Thermal
Analysis
Thermal analysis
includes calorimetry,
thermogravimetric
analysis (TGA), dynamic
thermal analysis (DTA).
Used to test how a
material responds to
temperature changes.

12. PART - B
• Explain that in what basis material testing process will be
selected for a particular application? (UN, CO1)
QUESTIONS