Flashcards
Materials
Cards in this deck (31)
- 1Materials ClassificationMetals and Metallic Alloys
Polymers
Ceramics
Composites - 2Types of BondingIonic Bonding (metal with non-metal)
Covalent Bonding (non-metal with non-metal)
Metallic Bonding (metal with metal) - 3Six Main Constituents of SteelsFerrite
Austenite
Cementite
Pearlite
Bainite
Martensite - 4Property of FerriteSoft and Ductile
- 5AusteniteNon-magnetic allotrope
- 6Properties of CementiteHard and Brittle
- 7Properties of PearliteHardness and strength like cementite
Ductility of ferrite - 8Property of MartensiteBrittle
- 9What is a eutectoid reaction?A eutectoid reaction is defined as a three phase reaction by which, on cooling, a solid transforms into two other solid phases
- 10How is Pearlite formedWhen ferrite and cementite combine at 88% and 12%
- 11Name the heat treatment methodsAnnealing
Normalising
Quenching
Tempering
Surface heat treatment
Carburising
Nitriding - 12What is annealing?Heating to just above the upper critical point and soaking at that temperature and cooling
- 13What is Normalising?Heating above the austenitic phase and then cooled in air
- 14What is quenching?Heating to the austenitic crystal phase and cooling rapidly
- 15What is temperingHeating to below lower critical temperature keeping it there for a certain time and cooling slowly
- 16What is surface heat treatment?Heating and cooling a surface to a certain depth without changing the chemical compositions
- 17What is Carburising?The process of adding carbon to the surface
- 18Name the types of copolymersAlternate
Block
Branch
Random - 19Definition of compositesMaterials which consist of continuous phase and fibrous dispersed phase with pronounced improvements in their properties and performances
- 20Commonly used thermoset resin for structural compositesUnsaturated polyester
Epoxy
Vinyl ester
Phenolics - 21Advantages of natural fibre reinforced polymer compositeRenewable resources
Unlimited availability
Environmental benefits
Balances CO2 release
Lightweight
Improved recyclability - 22Disadvantages of natural fibre reinforced polymer compositeLow mechanical properties
Inconsistency in quality
Dark colour
Hydrophilic
Limited thermal stability - 23Advantages of sandwich compositesStiffness
Strength
Buoyancy
Lower thermal conductivity - 24What is NDTNDT is defined as testing techniques which are capable of detecting defects in materials and structures without damaging or destroying the artefacts being tested
- 25NDT methodologiesVisual inspection
Acoustic emission
Thermography
Ultrasonic scanning - 26Manufacturing techniques for thermoplasticsCompression moulding
Injection
Extrusion
Blow moulding
Film blowing
Thermoforming - 27Name the control parameters for composites manufactureTemperature
Time
Pressure - 28Commonly used composite manufacturing techniquesHand lay up
Vacuum bagging
Compression moulding
Filament winding
Pultrusion - 29What is a manufacturing process?A sequence of operations often done on a machine or at a given area:
Welding
Casting
Cutting
Assembling - 30Four categories of engineering materialsMetals
Ceramics
Polymers
Composites - 31Three categories of processing operationsShaping operations
Property enhancing operations
Surface processing operations
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- Flashcards on Materials, created by Taylar Hayes on 11/04/2018.
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- Taylar Hayes
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