Bihar Engineering University, Patna Material Testing and Evoluation Bhagalpur College of engineering

1. Title: Introduction to Material
Testing in Material Engineering

2. Introduction
• Welcome to the presentation on
"Introduction to Material Testing in
Material Engineering."
• Material testing plays a crucial role
in understanding the mechanical
behavior and characteristics of
various materials
• In this presentation, we will explore

3. Slide 2: What is
Material Engineering?
• Material Engineering is a
multidisciplinary field that focuses on
the study of materials and their
properties
• It involves the selection, processing,
and testing of materials to ensure
they meet the required specifications
for various applications

4. Slide 3: Mechanical Behavior and
Characteristics
Mechanical behavior
refers to how materials
respond to applied
forces and loads
The characteristics of
materials, such as
strength, elasticity,
ductility, and hardness,
determine their suitability
for specific applications

5. Slide 4: Elasticity -
Principles and
Characteristics
• Elasticity is the property
of a material to regain its
original shape after the
removal of applied forces
• Hooke's Law describes
the linear relationship
between stress and strain
within the elastic limit

6. Slide 5: Plastic
Deformation of
Metals
• Plastic deformation
occurs when materials
permanently change
shape under stress
beyond the elastic limit
• Metals undergo plastic
deformation through
processes like slip and
dislocation movement

7. Slide 6: Tensile Test
and Standards
• Tensile testing is a fundamental
method to determine a material's
mechanical properties under tension
• Different materials have specific
standards for conducting tensile
tests
• Tensile tests provide information
about yield strength, ultimate tensile

8. Slide 7: True Stress -
Strain Interpretation
• True stress and strain consider the
actual cross-sectional area changes
during deformation
• They provide a more accurate
representation of material behavior
under extreme conditions

9. Slide 8: Hardness
Tests
• Hardness tests measure a material's
resistance to indentation or
scratching
• Common hardness testing methods
include Brinell, Vickers, and
Rockwell hardness tests
• Hardness values provide insight into
material strength and wear

10. Slide 9: Bending
and Torsion Test
• Bending and torsion tests assess a
material's behavior under flexural
and twisting loads
• These tests help determine
properties such as flexural strength
and torsional rigidity

11. Slide 10: Strength
of Ceramics
• Ceramics have unique mechanical
properties, including high hardness
and brittleness
• Their strength is influenced by
factors such as crystal structure,
porosity, and processing methods

12. Slide 11: Internal
Friction and Creep
• Internal friction refers to the energy
dissipation within a material during
cyclic loading
• Creep is the gradual deformation of
a material under constant load over
time
• Understanding these phenomena is
crucial for designing materials in

13. Slide 12: Brittle Fracture of
Steel and Temperature
Transition
• Brittle fracture occurs without
significant plastic deformation and is
highly sensitive to temperature
• The temperature transition approach
explains the shift from ductile to
brittle behavior at low temperatures

14. Slide 13: Background of
Fracture Mechanics
• Fracture mechanics studies the
behavior of cracks and flaws in
materials
• It provides a quantitative framework
to predict the failure of materials
containing defects

15. Slide 14: Fracture
Toughness Testing
• Fracture toughness
measures a material's
ability to resist crack
propagation
• Different materials have
unique fracture
toughness testing
methods

16. Slide 15: Concept of
Fatigue of Materials
• Fatigue is the process of progressive
damage and failure under cyclic
loading
• It is a significant concern for
materials subjected to repeated
stresses, leading to crack initiation
and propagation

17. Slide 16: Structural Integrity Assessment and
Fracture Mechanics
Structural integrity
assessment involves
evaluating materials
and components to
ensure safe and
reliable operation
Fracture mechanics
principles play a vital
role in predicting failure
and designing against
it

18. Slide 17:
Conclusion
• Material testing is essential for
understanding material behavior and
ensuring safety and reliability in
various applications
• Mechanical properties, elasticity,
plasticity, hardness, and fracture
behavior are critical factors studied
through various testing methods

19. Slide 18:
Q&A
Session
Open the floor to questions from the
audience