Improvement of yttrium on the hot tearing susceptibility of 6TiB_2/Al-5Cu composite

查看全文 作　　者：[1]张晓波;[1]孙靖;[1]汪明亮;[1]张亦杰;[1]马乃恒;[1]王浩伟

机构地区：[1]State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University

出　　处：《Journal of Rare Earths》索引2015年第33卷第12期,共6页

基　　金：supported by the open fund (M27020) of National Laboratory of Solid State Microstructures (NLSSM), Nanjing University 摘　　要：To improve the severe hot tearing susceptibility of TiB_2 reinforced Al-5Cu matrix composites,the present research investigated the influence of Y on the hot tearing susceptibility of 6TiB_2/Al-5Cu composite.For the composite added with Y,the solidification temperature range was shortened,which was caused by the novel τ_1-Al_8Cu_4Y phase.The grain size of 6TiB_2/Al-5Cu composite was 39.8 μm.The addition of Y promoted the grain refinement,and the grain sizes were 36.33,33.42 and 26.77 μm for 6TiB_2/Al-5Cu with 0.2 wt.%,0.5 wt.%and 1 wt.%Y,respectively.The decrease of solidification temperature range and grain size was beneficial to the hot tearing susceptibility improvement.Furthermore,the hot tearing initiation force increased from 44 to 288 N,when 1 wt.%Y was added in 6TiB_2/Al-5Cu.For the above significant influence,the hot tearing susceptibility values were reduced by 12.2 wt.%,57.7wt.%and 66.8 wt.%for 6TiB_2/Al-5Cu with 0.2 wt.%,0.5 wt.%and 1 wt.%Y,accordingly. 关键词：铝基复合材料热裂敏感性晶粒尺寸温度范围热裂倾向 TIB2 复合添加细化晶粒

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Improvement of yttrium on the hot tearing susceptibility of 6TiB_2/Al-5Cu composite

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