Research Initiation Award: An Experimental and Theoretical Investigation of Convective Heat and Mass Transfer During Solidification of a Metal Alloy

研究启动奖：金属合金凝固过程中对流传热传质的实验和理论研究

• 批准号: 9308359
• 负责人: Fan-Bill Cheung
• 金额: $ 9.96万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-09-15 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9308359&HistoricalAwards=false
• 关键词: Research; Initiation; Award; Experimental; Theoretical

ABSTRACT -- CTS 9308359 Prescott Funding is requested from NSF to support the initiation of a research program aimed at improving the understanding of convective transport phenomena during solid-liquid phase change of binary metal alloys. Since the transport of momentum, heat, and species strongly influence the metallurgical structure, chemical homogeneity, formation of voids, and entrapment of inclusions in solidified materials, improvements in phase change processes depend on having a detailed understanding of the attendant transport phenomena. Binary solid-liquid phase change processes are further complicated by coupling between micro- and macro-scale phenomena which is to be examined in the proposed project. A combined experimental and theoretical approach is proposed to study transport phenomena in metal alloys. The experimental portion of the study will utilize neutron radiography to perform post-experimental chemical analyses of ingot sections, as well as to obtain real-time records of species redistribution during phase change. The theoretical portion of the study will involve numerical computations based on a continuum model to account for stochastic behavior of the two phase (mushy) region and non-equilibrium effects, such as undercooling and recalescence.

摘要-- CTS 9308359 Prescott 要求NSF提供资金，以支持启动一项旨在提高对二元金属合金固液相变过程中对流传输现象的理解的研究计划。 由于动量、热量和物质的传输强烈影响凝固材料的冶金结构、化学均匀性、空隙的形成和夹杂物的截留，相变过程的改进取决于对伴随的传输现象的详细理解。 二元固-液相变过程由于微观和宏观尺度现象之间的耦合而进一步复杂化，这将在拟议的项目中进行研究。 提出了一种实验和理论相结合的方法来研究金属合金中的输运现象。 该研究的实验部分将利用中子射线照相术对铸锭部分进行实验后化学分析，并获得相变过程中物质再分布的实时记录。 研究的理论部分将涉及基于连续模型的数值计算，以解释两相（糊状）区域的随机行为和非平衡效应，如过冷和吸热。