Lab 3 Report
Experiment 1: Mechanical Working of Brass
We measured the hardness of the brass samples using the Rockwell hardness
scale, which is based on the indentation hardness of the materials. In other words, it
determines a materials hard
Lab 4/5 Report
Experiment 1: Optical Microscopy of the Microstructure of Brass
First, the brass specimens were polished, using sandpaper of varying grits,
water, alumina powder and cloth, and etching solution (ferric chloride etch). Once
Lab 2 Report
Experiment 1: Tensile Testing
We cut out samples of the two composite materials we made in the last lab,
consisting of resin as well as either carbon fiber or fiberglass. We measured the
original gauge length, width, and thickness
Lab 1 Report
Experiment 1: Making & Casting a Brass Alloy
By melting zinc and copper in a furnace, we are adding thermal energy to the
solid states of the metals. This adds enough energy to break the bonds between
individual atoms, and the met
PHASE TRANSFORMATIONS: DEVELOPMENT OF MICROSTRUCTURE AND ALTERATION OF
1. Cite the two distinct steps that are involved in the formation of particles of a new phase.
2. (a) For nucleation, make a schema
1. Define phase.
2. Name three important microstructural characteristics for multiphase alloys.
3. Cite three factors that affect the microstructure of an alloy.
4. Briefly explain the concept of phase equilibr
STRUCTURES AND PROPERTIES OF CERAMICS
1. Make a distinction between cations and anions.
2. Cite two features of the component ions that determine the crystal structure of a ceramic material.
3. Sketch/describe unit cells for
1. Cite the three usual causes of failure.
2. (a) Cite the two modes of fracture and the differences between them.
(b) Note which type of fracture is preferred, and give two reasons why.
3. Describe the mechanism of c
DISLOCATIONS AND STRENGTHENING MECHANISMS
1. Describe edge dislocation motion by the translation of an extra half-plane of atoms as atomic bonds are
repeatedly and successively broken and then reformed.
2. Describe how plasti
MECHANICAL PROPERTIES OF METALS
List three factors that should be considered in designing laboratory tests to assess the mechanical
characteristics of materials for service use.
2. Given the tensile load on a specimen and
a. Covalent bonds are non-directional.
b. Each atomic electron is characterized by five quantum numbers.
c. The equilibrium bonding distance corresponds to the distance of zero net
d. The leftmost columns of the periodic table o
Chapter 6: Mechanical strength
stress and strain (read stress/strain graph)
elastic vs plastic
ultimate tensile strength
Poissons ratio: relationship between strain in x or y vs strain in loading