Ultrasound cavitation induced nucleation in metal solidification: An analytical model and validation by real-time experiments.
Ultrasound cavitation induced nucleation in metal solidification: An analytical model and validation by real-time experiments.
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金属凝固中超声空化诱导成核：分析模型和实时实验验证
DOI：
10.1016/j.ultsonch.2021.105832
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发表时间：
2021-12
影响因子：
8.4
通讯作者：
Mi J
中科院分区：
文献类型：
--
作者：
Huang H;Qin L;Tang H;Shu D;Yan W;Sun B;Mi J
建立了预测空蚀过冷度、晶粒形核和凝固晶粒尺寸的解析模型。利用超快同步辐射X射线成像技术对金属熔体中的空泡内爆进行了原位成像。该模型考虑了超声输入强度、空化气泡尺寸和熔体温度的影响。利用该模型计算了不同合金的凝固晶粒尺寸，并与实验数据进行了比较。超声熔融加工是一种环境友好的金属合金组织细化方法。针对目前国内外尚未有文献报道如何根据超声工艺参数预测凝固组织和晶粒尺寸的问题，本文建立了一个计算空化强化过冷度和超声细化Al-Cu合金凝固组织和晶粒尺寸的解析模型。利用超快同步辐射X射线成像和层析成像技术实时采集实验数据，对模型和计算结果进行验证。模型和实验之间的比较表明，存在一个有效的超声输入功率强度为最大化的晶粒细化效果的Al-Cu合金，这是在20-45 MW/m2的范围内。此外，在USMP过程中温度的单调增加对产生新的晶核具有负面影响，使由于超声的应用而产生的微结构细化的益处劣化。
An analytical model is developed to predict the cavitation induced undercooling, grain nucleation and the solidified grain size. Cavitation bubble implosion in metallic melts were imaged in-situ by ultrafast synchrotron X-ray imaging. The model takes into account of ultrasound input intensity, cavitation bubble size and the effect of melt temperature. The solidified grain size of different alloys were calculated using this model and compared with the experimental data. Microstructural refinement of metallic alloys via ultrasonic melt processing (USMP) is an environmentally friendly and promising method. However, so far there has been no report in open literature on how to predict the solidified microstructures and grain size based on the ultrasound processing parameters.In this paper, an analytical model is developed to calculate the cavitation enhanced undercooling and the USMP refined solidification microstructure and grain size for Al-Cu alloys. Ultrafast synchrotron X-ray imaging and tomography techniques were used to collect the real-time experimental data for validating the model and the calculated results. The comparison between modeling and experiments reveal that there exists an effective ultrasound input power intensity for maximizing the grain refinement effects for the Al-Cu alloys, which is in the range of 20-45 MW/m2. In addition, a monotonous increase in temperature during USMP has negative effect on producing new nuclei, deteriorating the benefit of microstructure refinement due to the application of ultrasound.
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影响因子：
8.4
作者：
Cogne, C.;Labouret, S.;Espitalier, F.
通讯作者：
Espitalier, F.
DOI：
10.1016/j.msea.2007.11.067
发表时间：
2008-07-25
影响因子：
6.4
作者：
Li, Y. L.;Feng, H. K.;Gong, L. Y.
通讯作者：
Gong, L. Y.
DOI：
10.1016/j.colsurfa.2005.12.015
发表时间：
2006-04-20
影响因子：
5.2
作者：
Lu, HM;Wen, Z;Jiang, Q
通讯作者：
Jiang, Q
Al-Cu合金熔体中空化气泡的同步辐射X射线成像
影响因子：
8.4
作者：
Huang, Haijun;Shu, Da;Sun, Baode
通讯作者：
Sun, Baode
超声空化引起的枝晶破碎的高速成像和建模研究
DOI：
10.1007/s11661-012-1188-3
发表时间：
2012-10-01
影响因子：
2.8
作者：
Shu, Da;Sun, Baode;Grant, Patrick S.
通讯作者：
Grant, Patrick S.