期刊文献+

过冷熔体中枝晶生长的相场模拟 被引量:3

SIMULATION OF DENDRITE GROWTH WITH PHASE FIELD MODEL
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摘要 本文利用相场方法对过冷镍熔体中枝晶生长过程进行了模拟,发现在过冷度低于 200 K时,生长速度与过冷度之间近似呈幂函数关系,当过冷度高于 200 K时,生长速度与过冷度之间基本呈线性关系。伴随着速度/过冷度之间关系的变化,枝晶尖端半径/过冷度的关系则呈现先减小后增加的趋势,并在 200 K时达到最小。本文还将模拟结果与实验值和经典LKT理论进行了比较,对上述关系转变的物理机制进行了分析。 Phase field model (PFM) is used to simulate the dendrite growth of pure nickel in un- dercooled melts. The simulation results show that the relationship between the dendrite tip velocity and the bulk undercooling undergoes a transformation from a power law to a linear one around 200 K, where the tip radius reaches its lowest value. This PFM simulated results are compared with the experimental results and the LKT prediction. The possible reason that causes the transition of velocity-undercooling relationship is proposed and the accompanied grain morphology change is also included.
出处 《工程热物理学报》 EI CAS CSCD 北大核心 2004年第3期487-489,共3页 Journal of Engineering Thermophysics
基金 自然科学基金(No.50395101)
关键词 过冷熔体 枝晶生长 相场模型 undercooling melts dendrite growth phase field model
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参考文献9

  • 1R Willnecker, D M Herlach, B Feuerbacher. Evidence of Nonequilibrium Processes in Rapid Solidification of Undercooled Melts. Phy. Rev. Lett., 1989, 62(23): 2707-2710
  • 2Ryo Kobayashi. Modeling and Numerical Simulations of Dendritic Crystal Growth. Physica D, 1993, 63:410-423
  • 3J Bragard, A Karma, Y H Lee, et al. Linking Phase-Field and Atomistic Simulations to Model Dendritic Solidification in Highly Undercooled Melts. Interface Science,2002, 10:121-136
  • 4S-L Wang, R F Sekerka, A A Wheeler, et al.Thermodynamically-Consistent Phase-Field Models for Solidification. Physica D, 1993, 69:189-200
  • 5A A Wheeler, B T Murray, R J Schaefer. Computation of Dendrites Using a Phase Field Model. Physica D, 1993,66:243-262
  • 6M B Amar. Dendritic Growth Rate at Arbitrary Undercooling. Phy. Rev. A, 1990, 41(4): 2080-2092
  • 7E Schleip, R Willnecker, D M Herlach, et al. Measurements of Untrarapid Solidification Rates in Greatly Undercooled Bulk Melts with a High Speed Photosensing Device. Mat. Sci. Eng., 1988, 98:39-42
  • 8于艳梅,杨根仓,赵达文,吕衣礼,A.Karma,C.Beckermann.相场法模拟过冷熔体枝晶生长的界面厚度参数的取值[J].自然科学进展(国家重点实验室通讯),2001,11(11):1192-1197. 被引量:10
  • 9R Gonz á lez-Cinca. Dendritic Shape at High Undercoolings. Physica A, 2002, 314:284-290

二级参考文献6

  • 1Karma A, et al. Phase field method for computationally efficient modeling of solidification with arbitrary interface kinetics. Physical Review E, 1996, 53(4): R3017
  • 2Kobayashi R. Modeling and numerical simulations of dendritic crystal growth. Physica D, 1993, 63(10): 410
  • 3Beckermann C, et al. Model melt connection in phase-field simmulations of solidification. Journal of Computation Physics, 1999, 154(1):468
  • 4Willnecker R, et al. Evidence of nonequilibrium processes in rapid solidification of undercooled metals. Physical Review Letters, 1989,62(23): 2707
  • 5Anar M B. Dendritic growth rate at arbitrary undercooling. Physical Review A, 1990, 41(4): 2080
  • 6刘深泉,陆启韶,陆启韶.各向异性相态场模型的Gibbs-Thompson关系[J].应用数学学报,1999,22(1):107-114. 被引量:1

共引文献9

同被引文献30

  • 1朱昌盛,荆涛,柳百成,赵红兆.热噪声促发枝晶侧向分支的相场法数值模拟[J].铸造,2004,53(12):1040-1042. 被引量:9
  • 2朱昌盛,王智平,荆涛,柳百成.二元合金非等温凝固相场法模拟[J].稀有金属材料与工程,2005,34(10):1565-1568. 被引量:12
  • 3田卫星,付海波,王周英,刘建,田学雷.相场模拟中金属固-液热扩散系数比对晶体侧向分支形貌的影响[J].铸造,2007,56(5):501-504. 被引量:3
  • 4Kamara A A, Rappel W J. Quantitative phase-field modeling of dendritic growth in two and three dimensions [J]. Physical Review, 1998, E57(4): 4323-4349.
  • 5Kamara A, Rappel W J. Phase-field method for computationally efficient modeling of solidification with arbitrary interface kinetics [J]. Physical Review,1996,E 53 (4): 3017-3020
  • 6胡汉起.金属凝固原理[M].北京:机械工业出版社,2000.109.
  • 7KOBAYASHI R.Modeling and numerical simulation of dendritic crystal growth[J].Physical D,1993,63(1):410-423.
  • 8BRAGARD J,KARMA A,LEE Y H,et al.Linking phase-field and automistic simulation to model dendritic solidification in Highly undercooled mellt[J].Interface Science,2002(10):121-136.
  • 9KARMA A,RAPPLE W J.Phase-field model of dendritic sidebranch with thermal noise[J].Physical Review E,1999,60:3 614-3 625.
  • 10LI Q,BEEKERMANN C.Evolution of the sidebranch structure in free dendritic growth[J].Acta.Mater.,1999,47(8):2 345-2 356.

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