Lab 5: Spark Test
The purpose of this lab is to identify various metal alloy. To do so, it is based on
the pattern and the color of sparks that are created when the unknown alloy is held
against a grinding wheel.
Lab 1: Unit Cell
1. Understand the unit cells for face-centered cubic and body-centered cubic.
2. Derive the relationships between unit cell edge length and atomic radius for face-centered
cubic and body-centered cub
The optical phenomenon by which the energy of a photon of light is assimilated within a substance,
normally by electronic polarization or by an electron excitation event.
Visual perception stimu
A phenomenon observed in some materials (e.g., MnO): complete magnetic moment
cancellation occurs as a result of antiparallel coupling of adjacent atoms or ions. The
macroscopic solid possesses
The quantity of heat required to produce a unit temperature rise per mole of material.
Linear coefficient of thermal expansion
The fractional change in length divided by the change in temperature.
The condition in which the rate of an electrochemical reaction is controlled by the slowest step in a sequence
of steps that occur in series.
The electrode in an electrochemical cell or
Face-centered cubic iron; also iron and steel alloys that have the FCC crystal structure.
Iron carbide (Fe3C).
A chemical constituent (element or compound) of an alloy that may be
Activation Energy (Q)
The energy required to initiate a reaction, such as diffusion.
The process by which the surface carbon concentration of a ferrous alloy is increased by diffusion
from the surroun
A metallic substance that is composed of two or more elements.
A concentration specification on the basis of the number of moles (or atoms) of a particular
element relative to the total number
The plastic deformation of a metal at a temperature below that at which it recrystallizes.
Critical resolved shear stress
The shear stress, resolved within a slip plane and direction, that is requ
Time-dependent elastic (nonpermanent) deformation.
Product of the calculated stress level (on the basis of estimated maximum load) and a
design factor (which has a value greater than
A copolymer in which two different repeat units alternate positions along the molecular
A type of polymer chain configuration (stereoisomer) i
Structures of Metals and Ceramics
The possibility of the existence of two or more different crystal structures for a substance
(generally an elemental solid).
Having a non-crystalline structur
Important terms and concepts
Atomic mass unit (amu)
A measure of atomic mass
Atomic number (Z)
The number of protons within the atomic nucleus.
Atomic weight (A)
The weighted average of the atomic masses of an
A material trait expressed in terms of the measured response to a specific imposed stimulus.
Attributes, characteristics, features, and types of things.
The arrangement of matter.