Metale i Stopy

Iron — Thermal Expansion

This figure depicts the linear thermal expansion and physical coefficient of thermal expansion (physical Współczynnik rozszerzalności termicznej (CTE) lub współczynnik liniowej rozszerzalności termicznej (CLTE)The coefficient of linear thermal expansion (CLTE) describes the length change of a material as a function of the temperature.CTE) of iron.

The sample was measured at a heating rate of 5 K/min in a helium atmosphere. At 906°C (peak temperature in the physical alpha) a shrinkage step was detected. This is due to a change in the lattice structure (bcc -> fcc). Another change in the lattice structure (fcc -> bcc) was detected at 1409°C. The deviation between the measured and literature transition temperatures is due to a small impurity content. (measurement with DIL 402 C)