Invar
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Invar, also known generically as FeNi36, is a nickel–iron alloy notable for its uniquely low coefficient of thermal expansion. The name Invar comes from the word invariable, referring to its relative
Samples of Invar
Thermal expansion
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Thermal expansion is the tendency of matter to increase in size with increasing temperature. Matter generally increases in length, area, and volume, changing its size and density, in response to an in
Expansion joint in a road bridge used to avoid damage from thermal expansion.
Lord Kelvin, the namesake of the unit of measure
Thermal expansion of long continuous sections of rail tracks is the driving force for rail buckling. This phenomenon resulted in 190 train derailments during 1998–2002 in the US alone.
Drinking glass with fracture due to uneven thermal expansion after pouring of hot liquid into the otherwise cool glass