TEM observation of recrystallisation in rapidly solidified hypercooled Co₈₀Pd₂₀ alloy

Abstract

Applying the fluxing method, hypercooling was achieved in Co₈₀Pd₂₀ alloys. After recalescence, the rapidly solidified microstructures of hypercooled Co₈₀Pd₂₀ alloys were subjected to rapid quenching. Applying transmission electron microscopy, high densities of substructures, e.g. dislocations and subgrains, and migration of high angle grain boundaries suggest the occurrence of partial recrystallisation in the hypercooled Co₈₀Pd₂₀ alloys.

Keywords:

• Solidification
• Metals and alloys
• Defects
• Microstructure
• Recrystallisation

The authors are grateful to the financial support of the Free Research Fund of State Key Laboratory of Solidification Processing (09-QZ-2008 and 24-TZ-2009), the Natural Science Foundation of China (51071127 and 51134011), the Fundamental Research Fund of Northwestern Polytechnical University (JC200801), China National Funds for Distinguished Young Scientists (51125002) and National Basic Research Program of China (973 Program, 2011CB610403), and the 111 project B08040.