Study of microstrain in rapidly solidified structures of hypercooled Co₈₀Pd₂₀ alloys

Abstract

Applying fluxing method, hypercooling was achieved in Co₈₀Pd₂₀ alloys. The rapidly solidified microstructures and substructures of hypercooled Co₈₀Pd₂₀ alloys, subjected to rapid quenching and natural cooling after recalescence, have been studied. Transmission electron microscopy was used to investigate the substructures such as dislocations in the as solidified microstructures. X-ray diffraction line profile analysis was used for illuminating and determining the microstrain due to rapid solidification in the as solidified microstructures. In the undercooling range studied, the microstrain in the rapidly solidified structures increases with increasing undercooling. Quenching immediately after rapid solidification is helpful to preserving the microstrain in the microstructures.

Keywords:

• Rapid solidification
• Undercooling
• Microstructure
• Recrystallisation
• Stress

View correction statement:

Study of microstrain in rapidly solidified structures of hypercooled Co80Pd20 alloys

The authors are grateful to the National Basic Research Program of China (973 Program, grant no.2011CB610403), China National Funds for Distinguished Young Scientists (grant no. 51125002), the Natural Science Foundation of China (grant nos. 51101122, 51071127, 50901059 and 51134011), the Free Research Fund of State Key Laboratory of Solidification Processing (grant nos. 66-QP-2010 and 24-TZ-2009), the Fundamental Research Fund (grant nos. JC201008 and JC200801) and the 111 Project (grant no. B08040) of Northwestern Polytechnical University.