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Mechanical properties and thermal stability of gradient structured Zr via cyclic skin-pass cryorolling

Journal Article


Abstract


  • Gradient-structured Zr sheets were fabricated by cyclic skin-pass cryorolling and cyclic skin-pass rolling. The mechanical properties and microstructural evolution of the gradient-structured Zr after rolling and annealing were investigated. The results indicated that the cyclic skin-pass cryorolled samples exhibited higher tensile strengths (��b = 557 MPa) and slightly lower fracture elongations (��u = 17.1%) than the cyclic skin-pass rolled samples due to high dislocation storage. After annealing at 150 ��C���450 ��C for 1 h, high-resolution transmission electron microscopy results showed that the ultrafine-grained layer of the cyclic skin-pass cryorolled samples exhibited better thermal stability, which was attributed to the formation of nanoscale twins and incomplete recovery of dislocations.

Publication Date


  • 2021

Citation


  • Li, J., Gao, H., Kong, C., Tandon, P., Pesin, A., & Yu, H. (2021). Mechanical properties and thermal stability of gradient structured Zr via cyclic skin-pass cryorolling. Materials Letters, 302. doi:10.1016/j.matlet.2021.130406

Scopus Eid


  • 2-s2.0-85109458953

Volume


  • 302

Issue


Place Of Publication


Abstract


  • Gradient-structured Zr sheets were fabricated by cyclic skin-pass cryorolling and cyclic skin-pass rolling. The mechanical properties and microstructural evolution of the gradient-structured Zr after rolling and annealing were investigated. The results indicated that the cyclic skin-pass cryorolled samples exhibited higher tensile strengths (��b = 557 MPa) and slightly lower fracture elongations (��u = 17.1%) than the cyclic skin-pass rolled samples due to high dislocation storage. After annealing at 150 ��C���450 ��C for 1 h, high-resolution transmission electron microscopy results showed that the ultrafine-grained layer of the cyclic skin-pass cryorolled samples exhibited better thermal stability, which was attributed to the formation of nanoscale twins and incomplete recovery of dislocations.

Publication Date


  • 2021

Citation


  • Li, J., Gao, H., Kong, C., Tandon, P., Pesin, A., & Yu, H. (2021). Mechanical properties and thermal stability of gradient structured Zr via cyclic skin-pass cryorolling. Materials Letters, 302. doi:10.1016/j.matlet.2021.130406

Scopus Eid


  • 2-s2.0-85109458953

Volume


  • 302

Issue


Place Of Publication