| Title |
A Study on the Modulated Microstructures with Superlattice induced by Supersaturation in TEM Observation at Alloys |
| Authors |
김성준(Sung Joon Kim); 이태호(Tae Ho Lee); 이용태(Yong Tai Lee); 최병학(Byung Hak Choe); 이종길(Jong Kil Lee); 신수근(Soo Keun Shin); 김영욱(Yeong Ouk Kim) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
modulated structure; metastable phase; additional ordered diffraction; bain distortion |
| Abstract |
Pretransition phenomena observed in four commercial alloy systems of β-C Ti, Al-Mg-Cu, Fe-Cu and Fe-N steel are reported. For the microscopic origin of the modulated structures, it is conjectured that orbital splitting of incomplete 3d electrons in the alloying elements causes electron-phonon coupled lattice displacements through Jahn-Teller`s bain distortions. This metastable phases are to be represented by a periodic regularity of electronic distribution, which could act as a role of an abnormal structural constitution about the modulated strain field and an additional ordered diffraction in TEM observation. |