搅拌摩擦加工Zr41Ti14Cu12.5Ni10Be22.5大块非晶的组织和性能

Structures and Performances of Zr41Ti14Cu12.5Ni10Be22.5 Bulk Amorphous Alloy

摘要:

研究了搅拌摩擦加工对Zr41Ti14Cu12.5Ni10Be22.5大块非晶的组织和性能影响规律。结果表明：搅拌摩擦加工后非晶合金没有发生晶化。室温下准静态压缩后，母材区﹑热影响区﹑搅拌区试样的抗压强度基本相当，但是搅拌区和热影响区的弹性模量明显提高，搅拌区和热影响区试样断裂前均出现锯齿流变现象，其断口呈现多重剪切特征，认为这与搅拌摩擦加工改变自由体积浓度和分布有关

Abstract:

The effects of friction stir processing on the structures and performances of Zr41Ti14Cu12.5Ni10Be22.5 bulk amorphous alloy were investigated. The results show that the microstructure of the stir zone exhibits amorphous state after friction stir processing. The strength of base metal, heat affecting zone (HAZ) and stir zone are almost similar under room temperature quasi static state compressing. However, the elastic modulus of the stir zone and the HAZ is increased markedly and the serration flow phenomena are found in the compressing curve of HAZ and stir zone before fracture. The fracture surface of stir zone and HAZ exhibit obvious multiple shear characters. It is considered that friction stir processing changes the concentration and distribution of freedom volume in stir zone and HAZ