GOALI/Collaborative Research: Design and Optimization of Powder Processed Ni-Base Superalloys via Grain Boundary Engineering

GOALI/合作研究：通过晶界工程设计和优化粉末加工镍基高温合金

• 批准号: 1334998
• 负责人: Sammy Tin
• 金额: $ 24.61万
• 依托单位: Illinois Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1334998&HistoricalAwards=false
• 关键词: GOALI; Collaborative; Research; Design; Optimization

This research is about design of microstructures in superalloy structures that exhibit superior mechanical properties through grain boundary engineering. The approach of this research will be to develop and link process models, capable of producing microstructures with distinct grain boundary characteristics, with behavior models, capable of determining the fatigue life based on the microstructure. Through physics-based approaches, a process map will relate the hot deformation parameters for Nickel-based superalloys to the formation of distinct grain boundaries and microstructures. Microstructures that produce superior properties will be identified through inverse fatigue modeling and fabricated in bulk components. The validation of desired mechanical properties and mechanisms for achieving strengthening at distinct boundaries will be identified through novel in situ loading experiments coupled with strain field measurements and orientation mapping. If successful, the benefits of this research will include the design of microstructures in bulk engineering materials that exhibit superior and tailorable mechanical properties, thus producing an increase in safety, performance, and energy efficiency of components for gas turbine engine applications. More generally, the fundamental science will enable: (a) an identification of the types of microstructures that produce advances in fatigue life, (b) an understanding of the strengthening mechanisms of these distinct grain boundaries, and (c) process maps to achieve such structures. Each of the aforementioned items will enable designs of microstructures in a wide class of materials and components that exhibit superior mechanical behavior. The broader impact of this research is four-fold: (i.) a materials camp for high school science teachers, (ii.) inclusion of women and underrepresented groups, (iii.) open and wide-spread dissemination through HUB technology, and (iv.) industrial interaction including technology transfer.

本研究是关于通过晶界工程设计具有上级机械性能的高温合金结构的微观结构。本研究的方法将是开发和链接过程模型，能够产生具有不同晶界特征的微观结构，与行为模型，能够确定基于微观结构的疲劳寿命。通过基于物理的方法，工艺图将镍基高温合金的热变形参数与不同晶界和微观结构的形成联系起来。将通过反向疲劳建模确定产生上级性能的微观结构，并在散装组件中制造。所需的机械性能和机制，实现在不同的边界强化验证将通过新的原位加载实验加上应变场测量和取向映射。如果成功，这项研究的好处将包括在散装工程材料的微观结构的设计，表现出上级和定制的机械性能，从而产生的安全性，性能和能源效率的提高，燃气涡轮机发动机应用组件。更一般地说，基础科学将能够：（a）识别产生疲劳寿命进步的微观结构类型，（B）理解这些不同晶界的强化机制，以及（c）实现这种结构的工艺图。上述每一项都能在表现出上级机械性能的各种材料和部件中设计出微结构。这项研究的广泛影响是四方面的：（一）高中科学教师的材料营地，（二）妇女和代表性不足群体的参与，㈢通过HUB技术进行公开和广泛的传播，以及（iv.）包括技术转让在内的工业互动。