Achieving heterogeneous structure in hcp Zr via electroplastic rolling

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 722; pp. 93 - 98
• Main Authors: Li, Ming, Guo, Defeng, Li, Jingtao, Zhu, Shimin, Xu, Chao, Li, Kaifang, Zhao, Yadan, Wei, Bingning, Zhang, Qian, Zhang, Xiangyi
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 11.04.2018; Elsevier BV
• Subjects: Annealing; Back stress; Deformation; Deformation effects; Ductility; Electroplastic rolling; Energy storage; Heterogeneous structure; High strength; Microstructure; Nanostructured materials; Strain hardening; Zirconium; Electroplastic rolling; Heterogeneous structure; Ductility; Back stress; Strain hardening
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2018.02.106

Heterogeneous structure has been widely used to enhance the poor ductility of high-strength nanostructured materials. However, it is still a challenge to form heterogeneous structures in hard-deformed materials. Here, by using electroplastic rolling and subsequent low-temperature annealing, a heterogeneous structure was formed in the hard-deformed hcp Zr and exhibited a good combination of high strength and good ductility. Its formation can be attributed to the effective microstructure refinement and high deformation energy storage during the electroplastic deformation process. The present study is important for the design and fabrication of heterogeneous structured metals and alloys.