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Microstructure and Mechanical Properties of Al-Ti-Ti2AlNb Laminated Composites Based on Biomimetic Structure
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    Abstract:

    Based on the ductile-brittle composite principle of biomaterials , Al foils, Ti foils and Ti2AlNb foils were stacked in a certain order in this work, and Al-Ti-Ti2AlNb laminated composites were prepared by vacuum hot pressing sintering. The microstructure was analyzed by means of SEM and XRD, and the flexural and compressive properties were also analyzed. It is found that the laminated composites were composed of Ti, a series of TiAl compounds and Ti2AlNb combined with obvious hierarchical structure and clear interface. The flexural strength and compressive strength are 1231±71 MPa and 1341±63 MPa, respectively, which have significant advantages over similar materials. The analysis shows that the existence of laminated structures plays an important role in optimizing the mechanical properties. Compared with the conventional binary TiAl layered materials, the existence of Ti2AlNb layers significantly improves the mechanical properties.

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[Han Baoshuai, Xu Yan-jin, Wan Xiong, Jing Tao, Hou Hongliang, Ma Xiaoguang, Pei Baoqing. Microstructure and Mechanical Properties of Al-Ti-Ti2AlNb Laminated Composites Based on Biomimetic Structure[J]. Rare Metal Materials and Engineering,2020,49(6):2083~2088.]
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History
  • Received:April 30,2019
  • Revised:August 17,2019
  • Adopted:September 06,2019
  • Online: July 09,2020
  • Published: