Transactions of Materials and Heat Treatment

Title：Microstructure analysis on typical deformation zone of alloy Cu-Ni-Si under continuous extrusion

Authors： Su Honglin Li Mingliang Liu Ping Liu Xinkuan Chen Xiaohong Ma Fengcang Li Wei

Unit： Yancheng Institute of Industry Technology University of Shanghai for Science and Technology

KeyWords： Cu-Ni-Si alloy continuous extrusion 90°bending

ClassificationCode：TG376

year,vol(issue):pagenumber：2015,40(5):80-83

Abstract：

The microstructures in typical deformation zones such as adhesion zone, before and after 90°bending zones during continuous extrusion of alloy Cu-Ni-Si were studied by sampling and analysis with TEM. The results indicate that, in the adhesion zone, the grain tensile deformation accompanied with a large number of dislocation entanglements occurs in Cu-Ni-Si alloy without the second precipitated phase. In the deformation zone before 90°bending, the second phase particles Ni2Si with extremely small size about 5 nm appear dissipatedly. And in the deformation zone after 90°bending, the precipitated phase particles grow up to 10 nm further, and the incomplete dynamic recrystallization appears whose formation mechanism is that dislocation accumulation and entanglement until merging and rearrangement lead to cellular sub structure formed.

Funds：

上海市教委创新项目(11YZ112)；上海市科委基础研究重点项目(10JC1411800)；上海市教育委员会重点学科建设项目(J50503)

苏宏林（1961-），男，学士，副教授

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