Quantitative multi-phase-field modeling of non-isothermal solidification in hexagonal multicomponent alloys
Quantitative multi-phase-field modeling of non-isothermal solidification in hexagonal multicomponent alloys
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六方多元合金非等温凝固的定量多相场建模
DOI：
10.1007/s41230-022-1123-y
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发表时间：
2022-05
期刊：
影响因子：
1.6
通讯作者：
Peng Liming
中科院分区：
文献类型：
--
作者：
Wang Yongbiao;Wei Mingguang;Liu Xintian;Chen Cong;Liu Jianxiu;Wu Yujuan;Dong Shuai;Peng Liming
建立了非等温多晶凝固的定量多相场模型，并将其应用于六方密排结构的稀相多元合金。系统地研究了刘易斯系数和过冷度对枝晶生长的影响。结果表明，较大的刘易斯系数有利于潜热的释放，从而促进枝晶生长，但抑制枝晶尖端半径。初始过冷度越大，枝晶生长驱动力越强，枝晶生长速率越快，固相分数越高，溶质显微偏析越严重。模拟的枝晶生长动力学与唯象理论的预测是一致的，但显着偏离经典的JMAK理论，忽略了软碰撞效应和枝晶之间的相互阻塞。最后，取Mg-6 Gd-2 Zn（wt.%）合金为例，模拟的枝晶形貌与实验结果吻合良好。
A quantitative multi-phase-field model for non-isothermal and polycrystalline solidification was developed and applied to dilute multicomponent alloys with hexagonal close-packed structures. The effects of Lewis coefficient and undercooling on dendrite growth were investigated systematically. Results show that large Lewis coefficients facilitate the release of the latent heat, which can accelerate the dendrite growth while suppress the dendrite tip radius. The greater the initial undercooling, the stronger the driving force for dendrite growth, the faster the growth rate of dendrites, the higher the solid fraction, and the more serious the solute microsegregation. The simulated dendrite growth dynamics are consistent with predictions from the phenomenological theory but significantly deviate from the classical JMAK theory which neglects the soft collision effect and mutual blocking among dendrites. Finally, taking the Mg-6Gd-2Zn(wt.%)alloy as an example, the simulated dendrite morphology shows good agreement with experimental results.
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影响因子：
3.3
作者：
Yun-Neng Chen;X. Qi;Dianzhong Li;X. Kang;N. Xiao
通讯作者：
Yun-Neng Chen;X. Qi;Dianzhong Li;X. Kang;N. Xiao
不同溶质添加量对铸造二元镁合金枝晶形貌和取向选择的影响
影响因子：
9.4
作者：
M. Yang;S.-M. Xiong;Z. Guo
通讯作者：
Z. Guo
DOI：
10.1088/0953-8984/10/17/014
发表时间：
1998-05
期刊：
Journal of Physics: Condensed Matter
影响因子：
--
作者：
T. Pradell;D. Crespo;N. Clavaguera;M. Clavaguera-Mora
通讯作者：
T. Pradell;D. Crespo;N. Clavaguera;M. Clavaguera-Mora
影响因子：
4.5
作者：
M. Starink
通讯作者：
M. Starink
影响因子：
3.7
作者：
B. Kooi
通讯作者：
B. Kooi