Materials Flashcards
What is Compression?
Forces that tend to crush.
What is Tension?
Forces that tend to stretch.
What is Torsion?
Forces that tend to twist.
What is Deflection?
Forces that tend to bend.
What is Shearing?
Forces that to cut.
What are Constraints?
Forces that deform parts.
What are Mechanical Properties?
Physical properties that a material exhibits upon the application of forces.
What is Hardness?
Ability to resist indentation or abrasion.
What is Elasticity?
Ability to return to it’s original form after under going a constraint.
What is Resillience?
Ability to resist shocks without breaking.
What is Ductility?
Ability to be stretched without breaking.
What is Malleability?
Ability to be flattened or bent without breaking.
What is Stiffness?
Ability to maintain their shape when subjected to various constraints.
What is a Elastic Deformation?
A temporary change in the shape or dimensions of the material, which returns to it’s original form once the constraint is removed.
What is a Plastic Deformation?
A permanent change in the shape or dimensions, which stays deformed after the constraint is removed.
What is a Fracture Deformation?
The constraint is so intense the material breaks.
What is Resistance to Corrosion?
Ability to resist the effects of rust formatting.
What is Electrical Conductivity?
Ability to carry an electrical current.
What is Thermal Conductivity?
Ability to transmit heat.
What are the two types of plastics?
Thermoplastic and Thermosetting.
What are Thermoplastics?
Plastics that can be heated to soften and be shaped over and over again. They also harden when cooled.
What are the properties of Thermoplastics.
Elasticity
Resilience
Resistance to Corrosion.
What are Thermosetting plastics?
Plastics that can be heated and shaped once and always remain hard, even in heat.
What are the properties of Thermosetting plastics?
Hardness
Resilience
Heat Resistance
Stiffness
What are the two types of wood?
Wood and Modified Wood.
What are the properties of wood?
It’s hard and durable
Has good elasticity (depends on the type of wood)
Has low thermal and electrical conductivity.
Has many colours and shapes.
What are the three varieties of modified wood?
Plywood
Particleboard
Fibreboard
Why does wood deteriorate quickly?
Because it’s organic.
What are some ways of protecting wood?
Varnishing
Painting
Wood Wax (optional answer)
Chemical treatment (optional answer)
What are some examples of ceramics?
Glass
Mugs
Plates
What are the properties of Cermics?
Low electrical conductivity
High degree of hardness
Resistant to corrosion
Fragile
Heat Resistant and low thermal conductivity
Generally ceramics are very durable, however what causes them to degrade?
Acids and thermal shocks.
What are some ways of protecting ceramics?
Storage of materials in temperature.
Dry areas can help preserve ceramics.
What are the two types of alloys?
Ferrous
Non-Ferrous
What is a Ferrous Alloy?
An alloy that’s main component is iron.
What is a non-ferrous alloy?
Main component is not iron.
What causes metals to degrade?
Oxidation (rusting)
What can be used to protect metals?
Metallic coatings
Paint
Grease
Steel heat treatment
What is Drilling?
To make a hole in a material.
What does Drilling depend on?
The diameter of the hole
Speed of the drill bit
What is Tapping?
Screw threads inside the hole.
What is Threading?
Screw threads that are etched or formed outside of a rod.
What is Bending?
The process by which a material is pressed into shape.
What is the first step in the manufacturing process?
Measuring and Laying out.
What are the steps of Machining?
Cutting
Drilling
Tapping
Threading
Bending
Inspecting
What is the third step in the manufacturing process?
Assembling and Finishing.
What are the steps of Assembling?
Screwing
Nailing
Bonding
Bolting
Riveting
Welding
What is Bonding?
Joining of two materials together.
What is Welding?
To fuse two or more parts using heat.
What are the steps in Finishing?
Painting
Staining
Varnishing
Polishing
What is the name of the machine used to cut the wood?
Band Saw
What is the name of the machine that drills holes into wood?
Drill Press
