<strong>Pb-Al</strong>合金定向凝固组织形成过程

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Pb-Al合金定向凝固组织形成过程

李彦强, 赵九洲, 江鸿翔, 何杰

Microstructure Formation in Directionally Solidified Pb-Al Alloy

LI Yanqiang, ZHAO Jiuzhou, JIANG Hongxiang, HE Jie

图15 Pb-0.15Al合金定向凝固条件下粒子Stokes运动速度z分量的最大值( $u_{S z}^{m a x}$ )、熔体对流速度z分量的最大值( $V_{c z}^{m a x}$ )及合速度z分量的最大值( $u_{S z}^{m a x}$ + $V_{c z}^{m a x}$ + $V_{0 z}^{}$ )随凝固速率的变化
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Fig.15 Maximum of the z component of Stokes movement velocity of Al-rich particles ( $u_{S z}^{m a x}$ ), maximum of the z component of melt convection velocity ( $V_{c z}^{m a x}$ ) and maximum of the z component of the resultant velocity ( $u_{S z}^{m a x}$ + $V_{c z}^{m a x}$ + $V_{0 z}^{}$ ) versus V₀ when directionally solidifying Pb-0.15Al alloys ( $V_{0}^{c}$ —the critical value of solidification rate. Inset shows the high magnified curves)