Fine Faults and Crystal Structures of Precipitates in Fe-Mo and Fe-W Alloys

• Published in: Japanese Journal of Applied Physics Vol. 6; no. 7; p. 826
• Main Authors: Yagisawa, Kōhei, Fujita, Hiroshi
• Format: Journal Article
• Language: English
• Published: 01.01.1967
• ISSN: 0021-4922; 1347-4065
• DOI: 10.1143/JJAP.6.826

To investigate crystal structure and two-dimensional faults of the precipitates in Fe-Mo alloys, electron microscopic method was used. The crystal structure of the precipitates in Fe-Mo alloys aged above 1000°C was found to be rhombohedral, while it was generally hexagonal in the alloys aged bellow 900°C. Both kinds of precipitates were formed in approximately the same amount when aged at 940°C. The precipitates of both structures were found to have numerous two-dimensional faults. The faults were found on {00.1} hex , {10.1} hex and {10.0} hex planes in the precipitates of the hexagonal structure and on {111} rhomb and {100} rhomb planes in the precipitates of the rhombohedral structure. In the hexagonal precipitates in the Fe-W alloy aged at 950°C, faults were observed also on {00.1} hex and {10.1} hex planes.