<strong>Al-Bi</strong>合金凝固过程及微合金化元素<strong>Sn</strong>的影响

Al-Bi合金凝固过程及微合金化元素Sn的影响

黎旺^1,²,孙倩^1,²,江鸿翔¹,赵九洲^1,²(

)

Solidification of Al-Bi Alloy and Influence of Microalloying Element Sn

Wang LI^1,²,Qian SUN^1,²,Hongxiang JIANG¹,Jiuzhou ZHAO^1,²(

)

图9. Al-9.0%Bi和Al-9.0%Bi-0.10%Sn合金测量熔体温度( $T m e l t$ )、平衡组元互溶温度( $T b$ )、过冷度( $Δ T d = T b - T m e l t$ )、富Bi相液滴形核率( $I d$ )和α-Al体积分数( $ξ$ _α_-Al)随凝固时间的变化

Fig.9. Measured temperature ( $T m e l t$ ), equilibrium bimodal line temperature ( $T b$ ), undercooling ( $Δ T d = T b - T m e l t$ ) of the matrix melt, nucleation rate of the Bi-rich droplets ( $I d$ ) and the volume fraction of α-Al ( $ξ$ _α_-Al) as a function of time during a cooling of the Al-9.0%Bi alloy (dash line) and Al-9.0%Bi-0.10%Sn alloy (solid line). The inserted figure is the enlargement of the microstructure evolution during the period from 3.47 s to 3.55 s. The subscripts 1 and 2 represent the primary droplets and the secondary droplets, respectively