Abstract
The structure changes of the iron–carbon system from Fe 75C 25 to Fe 50C 50 and Ni 75C 25 by mechanical alloying of elemental powders were studied using X-ray diffraction and 57Fe Mössbauer spectroscopy. Super-saturated hexagonal solid solutions were formed as bcc→orthorhombic structure (cementite)→hcp in the Fe–C system and fcc→hcp in Ni 75C 25. It is considered that the locally high compression is generated by the forced solid dissolving of large amount of carbon atoms into the interstitially octahedral sites.
Published Version
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