6A Aircraft Materials and Corrosion
This property describes a metal’s ability to be hammered or rolled into thin sheets without cracking.
malleability
This category of materials includes iron, aluminium, and copper, and is known for properties like conductivity and strength.
metals
This process involves heating and cooling a metal to change its physical and mechanical properties without altering its shape.
heat treatment
This tool is commonly used to measure the temperature of metal during heating.
thermometer
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This type of strength measures a metal’s ability to withstand forces that attempt to pull it apart.
tensile strength
These metals contain iron and are typically magnetic, such as steel and cast iron.
ferrous metals
This heat treatment process softens metal, improves ductility, and relieves internal stresses.
annealing
This property refers to a metal’s ability to be stretched or drawn into wire without breaking.
ductility
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In steel, increasing the percentage of this alloying element increases hardness and tensile strength but reduces malleability.
carbon
This property describes a material’s ability to resist deformation or scratching, often increased through heat treatment.
hardness
This process rapidly cools heated metal, usually in water or oil, to increase hardness.
quenching
This cooling method is slower than quenching and often done in air to achieve moderate hardness.
normalizing
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This heat treatment process softens steel, relieves internal stress, and involves slow cooling, often in a furnace or insulating material.
annealing
This type of failure occurs when a material breaks suddenly without significant deformation, often seen in materials with low ductility.
brittle fracture
This process follows quenching and reduces brittleness while maintaining some hardness.
tempering
This undesirable property increases when metal is quenched too quickly, making it more likely to crack.
brittleness
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This aluminium alloy series uses zinc as its principal alloying element and is commonly used for high-strength aircraft structural components like wing spars.
the 7xxx series aluminium alloys
This property explains why metals like copper are commonly used in electrical wiring, as it allows the easy flow of electric current.
electrical conductivity
This property describes a material’s ability to absorb energy and plastically deform before fracturing, often improved through controlled heat treatment.
toughness
This internal condition in metals, reduced by annealing, is caused by uneven cooling or deformation during processing.
internal stresses
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