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Title: A nano lamella NbTi–NiTi composite with high strength

Abstract

A hypereutectic Nb60Ti24Ni16 (at%) alloy was prepared by vacuum induction melting, and a nano lamellae NbTi-NiTi composite was obtained by hot-forging and wire-drawing of the ingot Microscopic analysis showed that NbTi and NiTi nano lamellae distributed alternatively in the composite, and aligned along the wire axial direction, with a high volume fraction (similar to 70%) of NbTi nano lamellae. In situ synchrotron X-ray diffraction analysis revealed that stress induced martensitic transformation occurred upon loading, which would effectively weaken the stress concentration at the interface and avoid the introduction of defects into the nano reinforced phase. Then the embedded NbTi nano lamellae exhibited a high elastic strain up to 2.72%, 1.5 times as high as that of the Nb nanowires embedded in a conventional plastic matrix, and the corresponding stress carried by NbTi was evaluated as 2.53 GPa. The high volume fraction of NbTi nano lamellae improved the translation of high strength from the nano reinforced phase into bulk properties of the composite, with a platform stress of similar to 1.7 GPa and a fracture strength of similar to 1.9 GPa. (C) 2015 Elsevier B.V. All rights reserved.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1239627
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
Additional Journal Information:
Journal Volume: 633; Journal ID: ISSN 0921-5093
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
In situ synchrotron X-ray diffraction; Martensitic transformation; Ni Ti; Shape memory alloy (SMA); nano lamellae composite

Citation Formats

Jiang, Jiang, Jiang, Daqiang, Hao, Shijie, Yu, Cun, Zhang, Junsong, Ren, Yang, Lu, Deping, Xie, Shifang, and Cui, Lishan. A nano lamella NbTi–NiTi composite with high strength. United States: N. p., 2015. Web. doi:10.1016/j.msea.2015.03.010.
Jiang, Jiang, Jiang, Daqiang, Hao, Shijie, Yu, Cun, Zhang, Junsong, Ren, Yang, Lu, Deping, Xie, Shifang, & Cui, Lishan. A nano lamella NbTi–NiTi composite with high strength. United States. doi:10.1016/j.msea.2015.03.010.
Jiang, Jiang, Jiang, Daqiang, Hao, Shijie, Yu, Cun, Zhang, Junsong, Ren, Yang, Lu, Deping, Xie, Shifang, and Cui, Lishan. Fri . "A nano lamella NbTi–NiTi composite with high strength". United States. doi:10.1016/j.msea.2015.03.010.
@article{osti_1239627,
title = {A nano lamella NbTi–NiTi composite with high strength},
author = {Jiang, Jiang and Jiang, Daqiang and Hao, Shijie and Yu, Cun and Zhang, Junsong and Ren, Yang and Lu, Deping and Xie, Shifang and Cui, Lishan},
abstractNote = {A hypereutectic Nb60Ti24Ni16 (at%) alloy was prepared by vacuum induction melting, and a nano lamellae NbTi-NiTi composite was obtained by hot-forging and wire-drawing of the ingot Microscopic analysis showed that NbTi and NiTi nano lamellae distributed alternatively in the composite, and aligned along the wire axial direction, with a high volume fraction (similar to 70%) of NbTi nano lamellae. In situ synchrotron X-ray diffraction analysis revealed that stress induced martensitic transformation occurred upon loading, which would effectively weaken the stress concentration at the interface and avoid the introduction of defects into the nano reinforced phase. Then the embedded NbTi nano lamellae exhibited a high elastic strain up to 2.72%, 1.5 times as high as that of the Nb nanowires embedded in a conventional plastic matrix, and the corresponding stress carried by NbTi was evaluated as 2.53 GPa. The high volume fraction of NbTi nano lamellae improved the translation of high strength from the nano reinforced phase into bulk properties of the composite, with a platform stress of similar to 1.7 GPa and a fracture strength of similar to 1.9 GPa. (C) 2015 Elsevier B.V. All rights reserved.},
doi = {10.1016/j.msea.2015.03.010},
journal = {Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing},
issn = {0921-5093},
number = ,
volume = 633,
place = {United States},
year = {2015},
month = {5}
}