Hierarchical nanotwins in single-crystal-like nickel with high strength and corrosion resistance produced via a hybrid technique

Qiang Li; Sichuang Xue; Patrick Price; Xing Sun; Jie Ding; Zhongxia Shang; Zhe Fan; Han Wang; Yifan Zhang; Youxing Chen; Haiyan Wang; Khalid Hattar; Xinghang Zhang

doi:10.1039/C9NR07472D

Hierarchical nanotwins in single-crystal-like nickel with high strength and corrosion resistance produced via a hybrid technique†

Qiang Li,

^a Sichuang Xue,^a Patrick Price,^b Xing Sun,^a Jie Ding,

^a Zhongxia Shang,^a Zhe Fan,

^c Han Wang,^a Yifan Zhang,

^a Youxing Chen,^d Haiyan Wang,

^ae Khalid Hattar

^b and Xinghang Zhang

*^a

Author affiliations

* Corresponding authors

^a School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA

^b Sandia National Laboratories, Albuquerque, NM 87185, USA
E-mail: xzhang98@purdue.edu

^c Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA

^d Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, NC 28223, USA

^e School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA

Abstract

High-density growth nanotwins enable high-strength and good ductility in metallic materials. However, twinning propensity is greatly reduced in metals with high stacking fault energy. Here we adopted a hybrid technique coupled with template-directed heteroepitaxial growth method to fabricate single-crystal-like, nanotwinned (nt) Ni. The nt Ni primarily contains hierarchical twin structures that consist of coherent and incoherent twin boundary segments with few conventional grain boundaries. In situ compression studies show the nt Ni has a high flow strength of ∼2 GPa and good deformability. Moreover, the nt Ni has superb corrosion behavior due to the unique twin structure in comparison to coarse grained and nanocrystalline counterparts. The hybrid technique opens the door for the fabrication of a wide variety of single-crystal-like nt metals with unique mechanical and chemical properties.

Nanoscale

Hierarchical nanotwins in single-crystal-like nickel with high strength and corrosion resistance produced via a hybrid technique†

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Hierarchical nanotwins in single-crystal-like nickel with high strength and corrosion resistance produced via a hybrid technique

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