J. Mater. Sci. Technol. ›› 2020, Vol. 42: 113-121.DOI: 10.1016/j.jmst.2019.09.027
• Orginal Article • Previous Articles Next Articles
Xiaoyang Yi, Bin Sun, Weihong Gao, Xianglong Meng*(), Zhiyong Gao, Wei Cai, Liancheng Zhao
Received:
2019-08-09
Revised:
2019-08-28
Accepted:
2019-09-03
Published:
2020-04-01
Online:
2020-04-16
Contact:
Meng Xianglong
Xiaoyang Yi, Bin Sun, Weihong Gao, Xianglong Meng, Zhiyong Gao, Wei Cai, Liancheng Zhao. Microstructure evolution and superelasticity behavior of Ti-Ni-Hf shape memory alloy composite with multi-scale and heterogeneous reinforcements[J]. J. Mater. Sci. Technol., 2020, 42: 113-121.
Fig. 2. Morphologies of the mixed powders of the Ti-Ni-Hf alloys and TiB2 particles as well as the element mapping analyses: (a) lower magnification; (b) higher magnification; (c) Ti element; (d) Ni element; (e) Hf element; (f) B element.
Fig. 3. Microstructural characteristics of the Ti-Ni-Hf composites containing the different TiB2 contents: (a) 0.4 wt% TiB2; (b) 0.7 wt% TiB2; (c) 1.0 wt% TiB2; (d) 1.5 wt% TiB2.
Fig. 4. TEM images and the corresponding SAED patterns of the Ti-Ni-Hf composites with the various TiB2 contents: (a-c) 0.4 wt% TiB2; (d-f) 0.7 wt% TiB2; (g-i) 1.0 wt% TiB2; (j-l) 1.5 wt% TiB2.
Fig. 5. Illustration depicting the martensite microstructural evolution with the TiB2 content increasing for the present Ti-Ni-Hf composite: (a) 0.4 wt% TiB2; (b) 0.7 wt% TiB2; (c) 1.0 wt% TiB2; (d) 1.5 wt.% TiB2.
Fig. 6. DSC curves of the Ti-Ni-Hf composites with the different TiB2 contents after the various thermal cycles: (a) 0.4 wt% TiB2; (b) 0.7 wt% TiB2; (c) 1.0 wt% TiB2; (d) 1.5 wt% TiB2.
Fig. 7. Stress-strain cycles curves of the Ti-Ni-Hf composites with the different TiB2 contents: (a) 0.4 wt% TiB2; (b) 0.7 wt% TiB2; (c) 1.0 wt% TiB2; (d) 1.5 wt% TiB2.
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