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Microstructure and mechanical properties of Al-Fe-V-Si alloy and composites
BoluXiao,Jianzhong Fan,Lihua Zhou,Likai Shi 한양대학교 세라믹연구소 2006 Journal of Ceramic Processing Research Vol.7 No.2
Al-Fe-V-Si alloy and composites from it were prepared by a powder metallurgy (PM) route as well as by mechanical alloying (MA). Globular particles referred to as α-Al13 consisted of a quaternary silicide of Alx(FeV)ySi and α-AlFeSi diminished after ball milling and grows slightly during the fabrication process. Whereas, the particle in the PM samples grew extensively. For PM samples, the high temperature mechanical strength of the composite is slightly higher than for the unreinforced alloy.
Baohong Zhu,Yong’an Zhang,Baiqing Xiong,Hongwei Liu,Likai Shi,Songxiao Hui 한양대학교 세라믹연구소 2006 Journal of Ceramic Processing Research Vol.7 No.2
Heat-resistant Al-Fe-V-Si aluminum alloys enhanced by in-situ TiC particles have been prepared by spray forming process with suitable process parameters. Research results show that the microstructure of the as-deposited alloy is fine and homogeneous. In-situ TiC particles prevent the unstable phases from coming into being. On the other hand, the TiC particles increase the volume fraction of heat-resistant phases. So the mechanical properties of the reinforced alloy by in-situ TiC particles are better than that of Al-Fe-V-Si alloy without the TiC particles. The hot extrusion temperature is also an important parameter to be considered. It is proved better to extrude the alloy at lower temperature. The tensile strength of the alloy without TiC particles is about 435 MPa at room temperature and is about 204 MPa at 350oC. However, when the alloy is enhanced by in-situ TiC particles, the strength of alloy is about 482 MPa at room temperature and is about 224 MPa at 350oC.