CAREER: In-Situ Visualization of Metallurgical Processes

卡内基梅隆大学获得的这一职业奖是为了在高温冶金领域开展研究和教育活动，利用对生产金属和合金至关重要的过程的直接可视化。获得该奖项后，PI将分别使用共聚焦扫描激光显微镜（CSLM）和x射线透视观察界面面积和横截面，研究熔融金属中非金属夹杂物与熔融氧化渣的分离。本文将建立一个模型来预测分离速率、包合物的大小和形状在分离过程中的变化，并将该模型与实验观察结果进行比较。研究了液膜排水和破裂的影响，以及变形引起的夹杂物变化，以及与渣的化学反应。了解和预测非金属夹杂物在钢/渣界面上的分离将使工业能够设计渣和夹杂物化学物质，以实现更清洁的熔体，从而产生更可预测的微观结构，这将导致提高产品质量，过程控制和减少浪费。将开发一个基于网络的软件包，用于可视化铁碳二元体系中各种选定成分的相变、凝固和熔化，用于讲座演示或“虚拟实验”。在外联方面，将为暑期学术少数民族学生开发一个模块，努力使他们接触材料科学与工程领域的机会和挑战。将开发用于冶金过程可视化的光谱方法，例如通过观察界面面积和横截面将熔融金属中的非金属夹杂物分离到熔融氧化渣中。通过建模和计算机模拟来预测非金属氧化渣中熔融金属的分离速率，并控制冶金过程中夹杂物大小和形状的变化。这些研究对合金的精炼和加工具有潜在的工业应用价值。计划中的基于网络的方案将有利于对冶金过程感兴趣的更广泛的社区。为暑期少数族裔学生开发一个模块的外展计划将为这些学生在材料科学和工程领域创造兴趣并提供机会。

This CAREER award to Carnegie Mellon University is to carry out research and educational activities in the field of high temperature metallurgy by utilizing direct visualization of processes that are critical for producing metals and alloys. With this award, the PI will study the separation of non-metallic inclusions from molten metals into molten oxide slags by viewing the interface area and cross section with Confocal Scanning Laser Microscopy (CSLM) and X-ray fluoroscopy respectively. A model will be developed to predict the separation rates, inclusion of size and shape changes during the process, and comparing this model to the experimental observations. The effects of liquid film drainage and rupture, and changes in the inclusion due to deformation, and chemical reaction with the slag will be studied. Understanding and predicting the separation of non-metallic inclusions across steel/slag interfaces will enable industries to design slag and inclusion chemistries to achieve cleaner melts and thus produce more predictable micro-structures, which would result in increased product quality, process control and less waste. A web-based package will be developed for visualizing phase transformations, solidification and melting of various selected compositions across the iron-carbon binary systems for demonstrations in lectures or as "virtual experiments". In terms of outreach, a module will be developed for Summer Academic Minority Students in an effort to expose them to opportunities and challenges in Materials Science and Engineering fields.Spectroscopic methods will be developed for the visualization of metallurgical processes such as the separation of non-metallic inclusions from molten metals into molten oxide slags by viewing the interface area and cross section. A modeling and computer simulations will be carried out to predict the separation rates between molten metals from nonmetallic oxide slags, and to control changes in the size and shape of inclusions during the metallurgical processes. These studies would be of potential benefit to industrial applications in alloy refinements and processing. The planned web-based program would be of benefit to a wider community interested in metallurgical processes. The proposed outreach program to develop a module for Summer Academic Minority Students would create interest in and provide opportunities for these students in Materials Science and Engineering fields.