Thermodynamics and Crystallography of Interphase Boundaries in Lamellar Solid State Phase Transformations

层状固态相变中相间边界的热力学和晶体学

• 批准号: 9102966
• 负责人: Gary Shiflet
• 金额: $ 48.6万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-15 至 1996-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9102966&HistoricalAwards=false
• 关键词: Thermodynamics; Crystallography; Interphase; Boundaries; Lamellar

9102966 Shiflet Pearlite growth is investigated with respect to the role of crystallography in the context of kinetics and thermodynamics. The mathematics for coupled pearlite colony growth are examined. Experimental data are coupled to the thermodynamics and models of growth kinetics. With the use of a new Field Emission Gun transmission electron microscope (FEG-TEM), composition gradients in the developing colony are measured. This approach together with three dimensional modeling should assist in understanding phenomena such as lamellar versus degenerate growth, pearlite versus bainite phase selection, and orientation relationships. %%% This research program examines the factors affecting phase transformations in metal alloys. The understanding derived from studies such as this one can be applied to a wide range of metal alloy systems, such as steel alloys, to improve their properties. ***

小行星9102966 珠光体生长的动力学和热力学方面的晶体学的作用进行了研究。 研究了耦合珠光体团生长的数学模型。 实验数据耦合到热力学和生长动力学模型。 利用一种新型的场发射枪透射电子显微镜（FEG-TEM），测量了生长中菌落的成分梯度。 这种方法与三维建模应有助于理解现象，如层状与退化生长，珠光体与贝氏体相选择，取向关系。 本研究项目研究影响金属合金相变的因素。 从研究中获得的理解可以应用于广泛的金属合金系统，如钢合金，以改善其性能。 ***