Transformation strains in martensitic phase transitions of Co alloys

Autor:	T. Waitz, H. P. Karnthaler
Rok vydání:	1999
Předmět:	Phase transition Crystallography Materials science Transformation (function) Strain (chemistry) Condensed matter physics Transmission electron microscopy Phase (matter) Martensite General Materials Science Instrumentation Atomic units Burgers vector
Zdroj:	Phase Transitions. 67:695-705
ISSN:	1029-0338 0141-1594
DOI:	10.1080/01411599908224504
Popis:	The thermally induced fcc → dhcp martensitic phase transformation was investigated in two different CoFe alloys (Co-5.75 and 6.0at.% Fe). Analysis by transmission electron microscopy methods yields that in both alloys the transformation proceeds by the movement of transformation dislocations (partials) that are correlated on an atomic scale; partials on adjacent close packed planes interact and combine to a paired partial. Two different and competitive modes of the transformation were observed. In Co-6.0 at. % Fe all the paired partials have the same Shockley partial Burgers vector adding up their long-range strain fields (transformation mode A). Contrary to this, in Co-5.75 at.%Fe paired partials of different Burgers vectors are compensating their long-range strain fields on an atomic scale (transformation mode B). The mode of the transformation seems to depend on both the parameters of the material and the experimental conditions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dd719670924eea68a2995da36993468a https://doi.org/10.1080/01411599908224504 Zobrazit plný text záznamu