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Eutectic Composition Design,Microstructure, and Room Temperature Mechanical Property of NiAl-Cr-Ta Three-Phase Alloy |
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| Authors: | Wang Lei Gao Luhan Shen Jun Zhang Yunpeng Liu Gang Zhao Pengkang Zhang Guojun |
| Affiliation: | 1.School of Materials Science and Engineering, Xi’an University of Technology, Xi’an, 710048, P.R. China ;2.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, P.R. China ;3.School of Mechanical and Instrument Engineering, Xi’an University of Technology, Xi’an, 710048, P.R. China ; |
| Abstract: | In this paper, NiAl-33Cr-4.5Ta (at. pct) near-eutectic alloy consisting of NiAl, α-Cr and Laves is successfully designed by JMatPro software and verified by experiments. TEM result reveals that it exists an orientation relationship between each two phases. Directionally solidified (DS) alloy has a well-aligned microstructure and possesses a fracture toughness (9.8 MPa·m1/2). Moreover, the DS alloy has a tensile ductility (1.4 pct) at room temperature. Fracture behavior is analyzed by the crack propagation and fracture surface. Graphical Abstract |
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