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| Kinetics and Microstructural Control | ||||||||||||||||
| ·
The
change from the fcc to the bcc structure is shown schematically for pure
iron (which can also undergo a martensitic transformation).
· The bct cell formed by a relabelling of the crystal structure is shown in (b). If the lattice is then allowed to relax, it can go to the undistorted bcc unit cell. · In a material containing carbon, the bct unit cell may be retained at high carbon concentrations due to the distortion of the cell produced by the interstitial carbon atoms. |
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| From: Ashby & Jones, "Engineering Materials," Pergamon (1986) | ||||||||||||||||