文献类型：期刊文章

作　　者：王雪姣[1] 徐聪[1] Arfan MUHAMMAD[1] Shuji HANADA[2] Hiroshi YAMAGATA[3] 王文红[4] 马朝利[1]

机构地区：[1]北京航空航天大学材料科学与工程学院,空天先进材料与服役教育部重点实验室,北京100191 [2]Institute for Materials Research, Tohoku University [3]Center for Advanced Die Engineering and Technology, Gifu University [4]河北四通新型金属材料股份有限公司,保定071105

出　　处：《Transactions of Nonferrous Metals Society of China》

基　　金：Project(2012CB619503)supported by the Natioanl Basic Research Program of China;Project(2013AA031001)supported by the National High-tech Research and Development Program of China;Project(2012DFA50630)supported by the International Science&Technology Cooperation Program of China

年　　份：2014

卷　　号：24

期　　号：7

起止页码：2244-2250

语　　种：中文

收录情况：AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2013_2014、EBSCO、EI、IC、INSPEC、JST、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：To investigate the effects of Al-Ti-B-RE grain refiner on microstructure and mechanical properties of Al-7.0Si-0.55Mg （A357） alloy, some novel Al-7.0Si-0.55Mg alloys added with different amount of Al-STi-1B-RE grain refiner with different RE composition were prepared by vacuum-melting. The microstructure and fracture behavior of the AI-7.0Si-0.55Mg alloys with the grain refiners were observed by X-ray diffraction （XRD）, optical microscopy （OM）, scanning electron microscopy （SEM）, and the mechanical properties of the alloys were tested in mechanical testing machine at room temperature. The observation of AI-Ti-B-RE morphology and internal structure of the particles reveals that it exhibits a TiAl3/Ti2Al20RE core-shell structure via heterogeneous TiB2 nuclei. The tensile strength of Al-7.0Si-0.55Mg alloys with Al-5Ti-1B-3.0RE grain refiner reaches the peak value at the same addition （0.2%） of grain refiner.

关 键 词：A357 alloy  Al-5Ti-1B grain refiner  rare earth  FRACTURE refining effect  tensile strength  

分 类 号：TG146.21[材料类] TG223]