Destructive testing vs Non destructive testing Notes
Materials testing may be carried out on
1. Full size structures, members, or parts,
2. Models of structures, members, or parts,
3. Specimens cut from finished parts,
4. Specimens of raw or processed mat
Significance of testing materials Notes
The testing of materials may be performed with one of the three
(1) to supply routine information on the quality of a productcommercial or control testing,
(2) to develop new or better information on k
Material Testing Engineering Notes
What are Materials?
Thats easy! Look around.
Our clothes are made of materials, our homes are made of
materials - mostly manufactured. Glass windows, vinyl
siding, metal silverware, ceramic dishes
Most things are made fr
Newer Branches of Materials Science Notes
Nanotechnology: a relatively new area grown out of
techniques used to manufacture semiconductor circuits.
Machines can be produced on a microscopic level. Example
- miniature robots to do surgery inside the body o
History of Materials Notes
Basic Materials Testing
Materials testing is a much narrower field than materials
science or engineering.
It is determining the strength of certain materials.
It is mostly used to determine safety. Ex. concrete samples
Standard Specifications and Standardizing Agencies Notes
Specification: A precise statement of a set of requirements,
to be satisfied by a material, product, system or service. It is
desirable that the requirements, together with their limits,
should be e
Strain Hardening Terminology Notes
The plastic portion of the true stress-strain curve (or flow
stress curve) plotted on a log-log scale gives the n value as
the slope and the K value as the value of true stress at true
strain of one.
Ultimate Tensile Strength Terminology Notes
It is very difficult to find the actual yield strength
experimentally. Instead, we use a 0.2% offset yield strength.
0.2% offset yield strength is the point on the curve which is
offset by a strain of 0.2% (0.00
Basic Principles of Engineer Materials Notes
Step 1: Original shape and size of the specimen with no
Step 2: Specimen undergoing uniform elongation.
Step 3: Point of maximum load and ultimate tensile strength.
Step 4: The onset of necking (plastic i
Tensile Testing Lab Notes
Mechanical properties that are important to a design
engineer differ from those that are of interest to the manufacturing
In design, mechanical properties such as elastic modulus
and yield strength are important in orde