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Crack-free Cu9Ni6Sn strips via twin-roll casting and subsequent asymmetric cryorolling

Journal Article


Abstract


  • CuNiSn alloys often generate cracks during traditional deformation. In this study, we report the development of the crack-free Cu9Ni6Sn strips by using twin-roll casting with subsequent asymmetric cryorolling. Although cracks appear in asymmetric hot-rolled and asymmetric room-temperature-rolled strips, no cracks were observed in asymmetric cryorolled (173 K and 83 K) strips. Electron back-scattered diffraction images indicate that deformation is relatively uniform for asymmetric cryorolled strips, with obvious shear bands appearing in asymmetric room-temperature-rolled and asymmetric hot-rolled strips. Energy dispersive spectroscopy images show that the segregation of Sn element appears near cracks in asymmetric hot-rolled and asymmetric room-temperature-rolled strips. The Sn element is uniformly distributed in asymmetric cryorolled strips. Uniform deformation, reduced Sn element segregation, and enhanced ductility at cryogenic temperature all contribute to the crack-free nature of the Cu9Ni6Sn strips prepared by asymmetric cryorolling.

Publication Date


  • 2022

Citation


  • Wang, L., Tang, D., Kong, C., & Yu, H. (2022). Crack-free Cu9Ni6Sn strips via twin-roll casting and subsequent asymmetric cryorolling. Materialia, 21. doi:10.1016/j.mtla.2021.101283

Scopus Eid


  • 2-s2.0-85120642647

Volume


  • 21

Abstract


  • CuNiSn alloys often generate cracks during traditional deformation. In this study, we report the development of the crack-free Cu9Ni6Sn strips by using twin-roll casting with subsequent asymmetric cryorolling. Although cracks appear in asymmetric hot-rolled and asymmetric room-temperature-rolled strips, no cracks were observed in asymmetric cryorolled (173 K and 83 K) strips. Electron back-scattered diffraction images indicate that deformation is relatively uniform for asymmetric cryorolled strips, with obvious shear bands appearing in asymmetric room-temperature-rolled and asymmetric hot-rolled strips. Energy dispersive spectroscopy images show that the segregation of Sn element appears near cracks in asymmetric hot-rolled and asymmetric room-temperature-rolled strips. The Sn element is uniformly distributed in asymmetric cryorolled strips. Uniform deformation, reduced Sn element segregation, and enhanced ductility at cryogenic temperature all contribute to the crack-free nature of the Cu9Ni6Sn strips prepared by asymmetric cryorolling.

Publication Date


  • 2022

Citation


  • Wang, L., Tang, D., Kong, C., & Yu, H. (2022). Crack-free Cu9Ni6Sn strips via twin-roll casting and subsequent asymmetric cryorolling. Materialia, 21. doi:10.1016/j.mtla.2021.101283

Scopus Eid


  • 2-s2.0-85120642647

Volume


  • 21