Module 2: Key Terms Flashcards
What is Aluminium
A metal and element, which is lightweight, corrosion resistant, ductile, machinable and excellent cast-ability.
used extensively on the fuselage of planes though being replaced by lighter composites
what is the difference between toughness and strength?
Toughness is refered to the amount of engery required to fracture a material.
However** strength** is refered to the **maximum amount of stress **a material can withstand before it fractures.
What is annealing?
The purpose of annealing may be to remove stresses, soften, obtain a desired shape or improve machanibility. It involves heating steel to and hold at a suitable temperature.
What Is Cast Iron
Cast iron is an **alloy of iron and carbon. **There is usually around 2% to 4.5% carbon content. Cast iron has a relatively low melting point.
What is a Magnet?
A magnet is a piece of iron or other material exhibiting the properties of magnetism, i.e. it generates a force or magnetic field that attracts other ferromagnetic materials such as iron and attracts or repels other magnets.
what is **normalising **
A heat treatment process above crytalline temp then cooling in still airfor ferrous metals.
To enhance toughness by changing grain size.
Outline the skill of problem-solving in Engineering
Engineers may be tasked with or may be considered the primary problem solvers. Most projects engineers are involved in are centred around solving a problem. Whether that is designing something new or finding a new solution to something, engineers are required to solve problems.
Outline the skill of Designing in engineering
Engineers are not only tasked with solving a problem theoretically they must design a solution to that problem. Engineers must investigate various design solutions and investigate the materials required for the success of the design. In the design process, innovative and revolutionary designs may be created but some may only make minor adjustments to a previous design.
Outline the skill of Communication in Engineering
Engineers must be able to communicate their ideas in verbal, written and graphical forms. Some engineers are required to make presentations where they will explain the features of a proposed design. Engineers must be able to write a report that outlines the investigation that has gone into the design and the solution for the problems.
Outline the skill of Project Management in Engineering
Most engineering projects are now too large for one engineer to oversee the whole project. Today a team of engineers are involved in the design and realization stage. **The team of engineers can take different roles, whether that be supervisory, managers of parts of the project. **These roles are important so engineers can ensure that the project is being run according to the timeline and they are on the right schedule, also making sure they are keeping to the cost set in the initial planning.
What is an **alteranting current **
(AC)
What type of current does your house use
AC gets its name from the way that the direction of electron flow changes or alternates. In this process the positive and negative charges at either end of the conductor switch positions which results in the reversal of electron direction.
house is 240 v AC
What is** Austenite**
A face centred cubic (FCC) phase in the* iron carbon equilibrium* diagram, deignated by the symbol ɣ. It is a non magnetic solid solution of carbon in iron.
Brass
Non ferrous metal made up of copper and zinc (alloy)
What is Bronze
alloy of copper and tin it is a nonferrous metal.
What is **case hardening **
is a process of surface hardening invovling the change in composition of the outer layer of a ferrous metal.
the teeth on Gears are often case hardened
What is cast iron
cast iron cookware
A ferrous metal made of an alloy of iron and carbon (2-4.5%)
Iron bridge - first bridge to use cast iron before Steet replaced this material
Cold working
Involves changing the shape or size of metal by plastic deformation (usually at room temp) below the recrystallisation temp.
Hardness and tensile strength are increased
Ductility and impact values **decreased. **
What is Direct current (DC)
battery supply DC
constant flow of electrons in single direction.
What is Ductility
The ease with which a material deforms plastically while undergoing tensile forces
Ferrite
A body centred cubic (BCC) phase of the iron-carbon phase diagram.
Heat treatment
applies to several process
* annealing
* tempering
* normalising
involving heating metals to controlled temperatures for specific time periods and then cooling them at controlled rates.
* To soften work harden material and to strength alloys
