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Acta Metallurgica Sinica (English Letters)

, Volume 31, Issue 10, pp 1089–1097 | Cite as

Influence of Cryorolling on the Precipitation of Cu–Ni–Si Alloys: An In Situ X-ray Diffraction Study

  • Wei Wang
  • Zong-Ning Chen
  • En-Yu Guo
  • Hui-Jun Kang
  • Yi Liu
  • Cun-Lei Zou
  • Ren-Geng Li
  • Guo-Mao Yin
  • Tong-Min Wang
Article

Abstract

The effect of cryorolling on the precipitation process of deformed Cu–Ni–Si alloys was investigated through in situ synchrotron X-ray diffraction technique. The results demonstrate that the precipitation process is significantly accelerated by cryorolling. Cryorolling produces higher dislocation density, which provides more heterogeneous nucleation sites for Ni2Si precipitates, hence promotes precipitation. In the early stage of aging, the enhanced nucleation of precipitates accelerates the depletion of supersaturation, and finer precipitates are obtained. In addition, recrystallization is promoted as a result of high stored energy in the cryorolled Cu–Ni–Si alloys, which facilitates the formation of discontinuous precipitation in the late stage of aging.

Keywords

Copper alloy Cryogenic Rolling Aging precipitation Synchrotron radiation X-ray diffraction 

Notes

Acknowledgements

The authors gratefully acknowledge the supports of National Key Research and Development Program of China (No. 2017YFA0403803), the National Natural Science Foundation of China (Nos. 51525401, 51774065, 51690163 and 51601028), the Dalian Support Plan for Innovation of High-level Talents (Top and Leading Talents, 2015R013). The authors thank SSRF for providing the beamtime and all the staff members of the beamline BL14B1 for technical supports during experiments.

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Copyright information

© The Chinese Society for Metals and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Wei Wang
    • 1
  • Zong-Ning Chen
    • 1
  • En-Yu Guo
    • 1
  • Hui-Jun Kang
    • 1
  • Yi Liu
    • 2
  • Cun-Lei Zou
    • 1
  • Ren-Geng Li
    • 1
  • Guo-Mao Yin
    • 1
  • Tong-Min Wang
    • 1
  1. 1.Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and EngineeringDalian University of TechnologyDalianChina
  2. 2.Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghaiChina

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