Refining performance of Al–3Ti–0.2C–5Sr on A356 alloy and electron microanalysis of ternary Al–Ti–Sr phases  

作　　者：Hong-Liang Zhao Chuan-Bin Zhang Ya Gao Qi-Yan Sun 

机构地区：[1]Sun College of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450002,China [2]Department of Mechanical and Electrical Engineering,Xuchang Vocational Technical College,Xuchang 461000,China

出　　处：《Rare Metals》2017年第3期188-192,共5页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51174177)

摘　　要：The effect of Al-3Ti-0.2C-5Sr （wt%） grain refiner on the refining performance and modification of A356 alloy was investigated using optical microscope （OM）.The morphology and crystal structure of ternary Al-Ti-Sr phases in Al-3Ti-0.2C-5Sr refiner were analyzed by scanning electron microscopy （SEM） and transmission electron microscopy （TEM）.The results show that the ternary Al-Ti-Sr phases in Al-3Ti-0.2C-5Sr refiner can promote the grain refining efficiency of A356 alloy.The ternary Al-Ti-Sr phases co-exist in two morphologies,i.e.,blocky-like phase and surround-like phase,besides,which both have the same chemical composition of Al34Ti3Sr.The crystal structure of Al34TiaSr is face-centered cubic,and the lattice parameter is determined to be about 1.52 nm.The effect of Al-3Ti-0.2C-5Sr （wt%） grain refiner on the refining performance and modification of A356 alloy was investigated using optical microscope （OM）.The morphology and crystal structure of ternary Al-Ti-Sr phases in Al-3Ti-0.2C-5Sr refiner were analyzed by scanning electron microscopy （SEM） and transmission electron microscopy （TEM）.The results show that the ternary Al-Ti-Sr phases in Al-3Ti-0.2C-5Sr refiner can promote the grain refining efficiency of A356 alloy.The ternary Al-Ti-Sr phases co-exist in two morphologies,i.e.,blocky-like phase and surround-like phase,besides,which both have the same chemical composition of Al34Ti3Sr.The crystal structure of Al34TiaSr is face-centered cubic,and the lattice parameter is determined to be about 1.52 nm.

关 键 词：Grain refiner Aluminum alloy AI-Ti-Srphase Microscopic morphology Crystal structure 

分 类 号：TG146.21[一般工业技术—材料科学与工程]