Mechanical
Properties of Materials Module
Outcomes
1. Be able to explain and
demonstrate how to determine the key mechanical properties of materials from a
stress-strain curve.
2. Be able to use these mechanical
properties to determine the specifications for bulk processing methods.
3. Be able to explain how hardness
testing can best be used for quality control.
Preparation
ð
The
first paragraph of Chapter 3 should be given special attention. Section 3.1 is
key to this module. As you examine Figure 3.2 and the descriptive text, pay
careful attention to necking and elastic recovery. The description of true
stress and true strain is worth reading, However, please note that the formulae
for bulk processing have been converted to engineering stress and engineering
strain. Because of this I do not suggest paying much attention to Figure 3.4 or
the associated descriptive text. The same is true about Figure 3.5, Table 3.4
and Example 3.3. As you read Section 3.2 pay careful attention to the empirical
nature of hardness numbers.