Kinetics of Structural Transformations in Metal and Ceramic Systems

金属和陶瓷系统结构转变的动力学

• 批准号: 9817235
• 负责人: Armen Khachaturyan
• 金额: $ 38.1万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-06-01 至 2003-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9817235&HistoricalAwards=false
• 关键词: Kinetics; Structural; Transformations; Metal; Ceramic

9817235KhachaturyanThis theoretical award addresses the problems of evolution of the coherent microstructure formed in phase transformations. The long-term goal is development of virtual prototyping of microstructure evolution for future integration of computer simulation in materials design.There are two overall objectives. The first is to further develop simulation models with applicability to elastically inhomogeneous anisotropic materials with diffusional and diffusionless phase transformations and with complex crystallography producing multi-variant microstructure. This will require a significant advancement in the theory of elasticity of elastically and structurally inhomogeneous systems, in the theory of phase transformations and in computational techniques.The second objective is to conduct three dimensional simulations of technologically important systems, the Ni-Al superalloys and the Ti-Al (45-52% Al) alloys. The effect of applied stress and variation of input parameters on the microstructure will be investigated with the goal of finding optimal regimes for maximum slowdown in coarsening kinetics and microstructure control. %%%This theoretical award addresses the problems of evolution of the coherent microstructure formed in phase transformations. The long-term goal is development of virtual prototyping of microstructure evolution for future integration of computer simulation in materials design.There are two overall objectives. The first is to further develop simulation models with applicability to elastically inhomogeneous anisotropic materials with diffusional and diffusionless phase transformations and with complex crystallography producing multi-variant microstructure. This will require a significant advancement in the theory of elasticity of elastically and structurally inhomogeneous systems, in the theory of phase transformations and in computational techniques.The second objective is to conduct three dimensional simulations of technologically important systems, the Ni-Al superalloys and the Ti-Al (45-52% Al) alloys. The effect of applied stress and variation of input parameters on the microstructure will be investigated with the goal of finding optimal regimes for maximum slowdown in coarsening kinetics and microstructure control. ***

9817235 khachaturyan这个理论奖解决了相变中形成的相干微观结构的演化问题。长期目标是开发微观结构演变的虚拟样机，以便将来将计算机模拟集成到材料设计中。总体目标有两个。首先是进一步发展适用于具有扩散相变和无扩散相变以及具有复杂晶体学产生多种微观结构的弹性非均匀各向异性材料的模拟模型。这将需要在弹性和结构不均匀系统的弹性理论、相变理论和计算技术方面取得重大进展。第二个目标是对技术上重要的系统，Ni-Al高温合金和Ti-Al （45-52% Al）合金进行三维模拟。研究了施加应力和输入参数变化对微观结构的影响，目的是找到最大程度减缓粗化动力学和微观结构控制的最佳方案。这一理论奖项解决了相变过程中形成的相干微观结构的演化问题。长期目标是开发微观结构演变的虚拟样机，以便将来将计算机模拟集成到材料设计中。总体目标有两个。首先是进一步发展适用于具有扩散相变和无扩散相变以及具有复杂晶体学产生多种微观结构的弹性非均匀各向异性材料的模拟模型。这将需要在弹性和结构不均匀系统的弹性理论、相变理论和计算技术方面取得重大进展。第二个目标是对技术上重要的系统，Ni-Al高温合金和Ti-Al （45-52% Al）合金进行三维模拟。研究了施加应力和输入参数变化对微观结构的影响，目的是找到最大程度减缓粗化动力学和微观结构控制的最佳方案。＊**