Properties and materials testing 4.0 / 5 based on 1 rating ? Design & TechnologyASAQA Created by: Sofya AbramchukCreated on: 01-05-13 12:30 Mechanical properties Properties that determine how a material reacts to external forces 1 of 28 Plasticity The ability of materials to be permanently changed in shape, e.g. Polymers 2 of 28 MAlleability Can be deformed by compression (eg. hammering) before showing signs of cracking; e.g. copper bowl 3 of 28 Ductility Can be drawn out under tension before fracturing (e.g. deep drawing). E.g. aluminium can 4 of 28 Elasticity The ability to stretch and bend before returning to its normal shape and size when forces are removed. E.g. Liquid silicon rubber teat 5 of 28 Toughness The ability to withstand sudden impact or bending without fracture. E.g. tough-copper wire, brittle-high carbon steel or glass 6 of 28 Hardness The ability to withstand abrasive wear and indentation or deformation, hardness leads to brittleness. E.g. diamond, die steel drill bits 7 of 28 Durability The ability to withstood wear, tear, weathering and deterioration through corrosion, decay and degrading. E.g. kevlar protective pads 8 of 28 Stability The ability to resist change in size and shape due to environment, warping in wood and gradual extension in metals and polymers. E.g. MDF 9 of 28 Strength The ability to withstand force without breaking or permanently bending or deforming 10 of 28 Tensile strength Ability to resist stretching, e.g. reinforced bars-rebar-reinforced concrete beams. 11 of 28 Compressive strength Ability to resist pushing, e.g. mass concrete foundation slab 12 of 28 Bending strength Ability to resist bending, e.g. Wood 13 of 28 Shear strength Ability to resist sliding forces acting against each other, E.g. Concrete 14 of 28 Torsional strength Ability to resist twisting, e.g. glass or concrete 15 of 28 Physical properties Properties that refer to actual matter that forms the material 16 of 28 Fusibility The ability to change into a softened, molten or liquid state when heated, e.g. themoplastics 17 of 28 Density How closely packed the material is, its relative mass per unit volume, e.g. HIPS-expanded PS 18 of 28 Electrical conductivity Offers very low resistance to the low of electric current, e.g. metals-silver, copper, gold 19 of 28 Electrical insulators Offers very high resistance to the flow of electric current, e.g. ceramics, glass, nylon, PVC 20 of 28 Semi-cunductors Offers various levels of conductivity under specific conditions, e.g. LEDS 21 of 28 Thermal properties A material's reaction to heat 22 of 28 Thermal conductivity High flow of heat through material, e.g. Metals-copper, aluminum 23 of 28 Thermal insulator Low flow of heat through a material, e.g. wood or polymer handles 24 of 28 Thermal expansion How a material expands with heat and contracts when cold, e.g. thermostats 25 of 28 Optical properties Opaque (no light), translucent (some light) and transparent (all light passes through) 26 of 28 Magnetism The ability of being magnetized or attracted by a magnet, e.g steel, but not mild steel or stainless steel 27 of 28 Workshop testing Identifying materials by their appearance, e.g by their density, colour and shine (or how the light reacts with them) 28 of 28
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