In Situ High-Energy X-Ray Diffraction Study of Load Partitioning in Nb/NiTi Nanocomposite Plate

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• 作者：Cun Yu ; Lishan Cui ; Shijie Hao ; Daqiang Jiang…
• 刊名：Metallurgical and Materials Transactions A
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：46
• 期：7
• 页码：3271-3275
• 全文大小：1,586 KB
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• 作者单位：Cun Yu (1)
  Lishan Cui (1)
  Shijie Hao (1)
  Daqiang Jiang (1)
  Xiaobin Shi (1)
  Zhenyang Liu (1)
  Zunping Liu (3)
  Dennis E. Brown (2)
  Yang Ren (3)
  
  1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, P.R. China
  3. Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
  2. Department of Physics, Northern Illinois University, De Kalb, IL, USA
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Metallic Materials
  Structural Materials
  Physical Chemistry
  Ceramics,Glass,Composites,Natural Materials
  
• 出版者：Springer Boston
• ISSN：1543-1940

文摘

A nanocomposite composed of Nb nanosheets and NiTi shape memory alloy was fabricated by multiple cold rolling. High-energy X-ray diffraction measurements were performed to probe the deformation behavior of each component during uniaxial tensile loading at different temperatures. It is demonstrated that, as the samples were tested at 203?K (?0?°C) and 298?K (25?°C), the NiTi matrix exhibited a martensite reorientation and a stress-induced phase transformation, respectively, while the Nb nanosheets showed a higher elastic strain (~2.5?pct) in comparison to that (~0.9?pct) of a sample tested at a higher temperature of 453?K (180?°C). The Nb nanosheets, with a volume fraction of only 13?pct, undertake an applied stress of ~90?pct as the NiTi matrix undergoes the martensitic transformation. It appears that the strengthening of Nb nanosheets is optimized as the matrix deforms by a stress-induced phase transformation or by a martensite reorientation in nanocomposite.