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Revealing the Heterogeneous Nucleation and Growth Behaviour of Grains in Inoculated Aluminium Alloys During Solidification

机译:揭示铝合金凝固过程中晶粒的异质成核和生长行为

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An in situ X-ray radiographic study on the grain nucleation and grain growth of inoculated Al-10Cu and Al-20Cu alloys during isothermal melt solidification and directional solidification conditions with constant cooling rates has been carried out. The influence of additional level of inoculation particles, cooling rates, and temperature gradient on the nucleation rate and growth kinetics of grains have been quantitatively studied. The deterministic nature of the heterogeneous nucleation of aluminium grain on inoculant particles is revealed. Numerical microstructure models have been developed to simulate the nucleation and growth behavior of aluminum grains and a good agreement between the experimental results and simulation results have been achieved.
机译:进行了原位X射线射线照相研究,研究了在等温熔融凝固和定向凝固条件下,恒定冷却速率下接种的Al-10Cu和Al-20Cu合金的晶粒成核和晶粒长大。定量研究了接种颗粒的添加量,冷却速率和温度梯度对晶粒成核速率和晶粒生长动力学的影响。揭示了孕育剂颗粒上铝晶粒异质成核的确定性。已经开发了数值微结构模型来模拟铝晶粒的形核和生长行为,并且在实验结果和模拟结果之间取得了良好的一致性。

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