title: A transforming metal nanocomposite with large elastic strain, low modulus, and high strength.
abstract: Freestanding nanowires have ultrahigh elastic strain limits (4 to 7%) and yield strengths, but exploiting their intrinsic mechanical properties in bulk composites has proven to be difficult. We exploited the intrinsic mechanical properties of nanowires in a phase-transforming matrix based on the concept of elastic and transformation strain matching. By engineering the microstructure and residual stress to couple the true elasticity of Nb nanowires with the pseudoelasticity of a NiTi shape-memory alloy, we developed an in situ composite that possesses a large quasi-linear elastic strain of over 6%, a low Young's modulus of ~28 gigapascals, and a high yield strength of ~1.65 gigapascals. Our elastic strain-matching approach allows the exceptional mechanical properties of nanowires to be exploited in bulk materials.
authors.affiliation: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China.
authors.forename: Shijie
authors.initials: S
authors.lastname: Hao
authors.forename: Lishan
authors.initials: L
authors.lastname: Cui
authors.forename: Daqiang
authors.initials: D
authors.lastname: Jiang
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Han
authors.forename: Yang
authors.initials: Y
authors.lastname: Ren
authors.forename: Jiang
authors.initials: J
authors.lastname: Jiang
authors.forename: Yinong
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authors.lastname: Liu
authors.forename: Zhenyang
authors.initials: Z
authors.lastname: Liu
authors.forename: Shengcheng
authors.initials: S
authors.lastname: Mao
authors.forename: Yandong
authors.initials: Y
authors.lastname: Wang
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Xiaobing
authors.initials: X
authors.lastname: Ren
authors.forename: Xiangdong
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authors.lastname: Ding
authors.forename: Shan
authors.initials: S
authors.lastname: Wang
authors.forename: Cun
authors.initials: C
authors.lastname: Yu
authors.forename: Xiaobin
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authors.lastname: Shi
authors.forename: Minshu
authors.initials: M
authors.lastname: Du
authors.forename: Feng
authors.initials: F
authors.lastname: Yang
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Zheng
authors.forename: Ze
authors.initials: Z
authors.lastname: Zhang
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Li
authors.forename: Dennis E
authors.initials: DE
authors.lastname: Brown
authors.forename: Ju
authors.initials: J
authors.lastname: Li