Evidence of recrystallization mechanism of grain refinement in hypercooled Co₈₀Pd₂₀ alloys

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• 作者：X.L. Xu ; Y.Z. Chen ; F. Liu ; ^{liufeng@nwpu.edu.cn}
• 关键词：Solidification ; Metals and alloys ; Defects ; Microstructure ; Recrystallization
• 刊名：Materials Letters
• 出版年：2012
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：15 August, 2012
• 卷：81
• 期：Complete
• 页码：73-75
• 文件大小：429 K

摘要

Applying fluxing method, hypercooling was achieved in Co₈₀Pd₂₀ alloys. The microstructures and substructures of the as-solidified hypercooled Co₈₀Pd₂₀ alloys subjected to rapid quenching and natural cooling were investigated. Compared to the naturally cooled specimens showing typical microstructural characteristics of recrystallization, high densities of low-angle grain boundaries, dislocations and stacking faults were observed in the quenched specimens. These sub-structures suggest a partial recrystallization occurring in the quenched specimens and are believed as the evidence of recrystallization mechanism of grain refinement in hypercooled Co₈₀Pd₂₀ alloys. The relatively defect-free structure and the high-angle boundaries suggest a relatively sufficient recrystallization in the naturally cooled alloys.