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樊振中,王端志,王鲲鹏,熊艳才,陆政,郑卫东.Te、Sb对ZL114A合金T6态微观组织与力学性能的影响[J].稀有金属材料与工程(英文),2018,47(12):3880~3886.[fanzhenzhong,Wang Duanzhi,Wang Kunpeng,Xiong Yancai,Lu Zheng and Zheng Weidong.Study on Microstructure and Mechanical Properties of ZL114A Alloy in T6 State Bearing Te and Sb[J].Rare Metal Materials and Engineering,2018,47(12):3880~3886.]
Study on Microstructure and Mechanical Properties of ZL114A Alloy in T6 State Bearing Te and Sb
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Received:December 30, 2016  Revised:May 30, 2018
DOI:
Key words: Te and Sb element  ZL114A alloy  microstructure  mechanical properties  silicon modification
Foundation item:中国航空工业集团公司北京航空材料研究院基金资助(基金号KJSC160206)
Author NameAffiliation
fanzhenzhong,Wang Duanzhi,Wang Kunpeng,Xiong Yancai,Lu Zheng and Zheng Weidong  
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Abstract:
      The silicon modification was prepared by adding Te and Sb elements in the smelting process. The chemical composition of the material was determined by inductively coupled method, the mechanical properties, morphology and microstructural evolution of silicon under different T6 states were analyzed by DSC, OM, SEM, EDS, TEM and Universal testing machine. The results show that the number and density of Te, Sb and Si, Mg elements dissolve in the primary α-Al matrix and the endothermic peak among from 520℃ to 530℃ rises with the increase of the solid solution and aging temperature, together with an increased solution supersaturation of silicon in the quenching moment. Whereas, the quantity of Al4(Te,Sb) eutectic phase reduces continuously, the morphology of silicon particles change from pin-like, polygonal and long-rod to short-rod like, oval and spherical, the average size is merely 9 μm. The average tensile strength, yield strength, elongation, reduction of area and Vickers hardness after solidifing at 545℃ for 20h and aging at 170℃ for 10h with the polyethylene glycol quenching medium are 360MPa, 307MPa, 10.4%, 13.8% and 122, dimple morphology is the dominated fracture surface, accompanied by some intergranular fracture zone, and the average length of Mg2Si phase is about 224nm.