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J. Mater. Sci. Technol.  2017, Vol. 33 Issue (10): 1177-1181    DOI: 10.1016/j.jmst.2017.05.009
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In-situ synthesis of Al76.8Fe24 complex metallic alloy phase in Al-based hybrid composite
Zhao Kea, Cao Baobaob, Liu Jinlingc(), Wang Yiguanga, An Linand
aScience and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an 710072, China
bSchool of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
cState Key Laboratory of Traction Power, School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China
dDepartment of Materials Science and Engineering, Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, FL 32816, USA
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The complex metallic alloy (CMA), Al76.8Fe24, was in-situ synthesized in the Al-based hybrid composite by powder metallurgy technique. The structural analysis by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy indicated that the Al76.8Fe24 CMA phase was formed by diffusion of Fe atoms into the Al matrix during the sintering stage. The formation of the CMA phase was mainly determined by the sintering temperature which was just above the eutectic temperature of Al-Fe. Moreover, the fully dense Al-based hybrid composite was obtained and exhibited ultrahigh strength ~1100 MPa, indicating that this method is expected to be effective in producing CMA particle reinforced Al-based hybrid composite.

Key words:  Complex metallic alloy (CMA)      Mechanical alloying      Aluminum      Hybrid composites     
Received:  06 January 2017     
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1 These two authors contributed equally to this paper.

Cite this article: 

Zhao Ke, Cao Baobao, Liu Jinling, Wang Yiguang, An Linan. In-situ synthesis of Al76.8Fe24 complex metallic alloy phase in Al-based hybrid composite. J. Mater. Sci. Technol., 2017, 33(10): 1177-1181.

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C Si Mn P S Ni Cr Mo Fe
≤0.08 ≤1 ≤2 ≤0.045 ≤0.03 10.0-14.0 16.0-18.0 2.0-3.0 Bal.
Table 1  Chemical composition of the vails and balls (wt%).
Fig. 1.  (a) SEM image and (b-f) corresponding EDX composition maps of the milled Al-based composite powder.
Fig. 2.  EDX pattern of the milled Al-based composite powder.
Fig. 3.  XRD pattern of the milled Al-based composite powder.
Fig. 4.  XRD pattern of the sintered bulk Al-based hybrid composite.
Fig. 5.  (a) TEM bright fieldimage and (b) high resolution micrograph of the Al76.8Fe24 phase in Al-based hybrid composite. The SAED pattern in the inset of (a) corresponds to the dashed circle region in (a). The high resolution micrograph (b) was obtained from the black frame area in (a).
Fig. 6.  (a) SEM image and (b-f) EDX composition maps of the sintered bulk Al-based hybrid composite.
Fig. 7.  Statistical Al76.8Fe24 CMA particle size distribution in the Al-based hybrid composite.
Fig. 8.  (a) True stress-true strain curves at different strain rates and (b) typical fracture surface of the Al-based hybrid composite.
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