Understanding and Predicting Properties and Performance of Additively Manufactured Nickel-Based Superalloys

了解和预测增材制造镍基高温合金的特性和性能

• 批准号: 1662615
• 负责人: Guofeng Wang
• 金额: $ 42万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-07-01 至 2021-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1662615&HistoricalAwards=false
• 关键词: Understanding; Predicting; Properties; Performance; Additively

Additive manufacturing, or 3D Printing, offers tremendous opportunity for efficient, custom manufacturing of critical parts. This processing approach can be applied to Nickel-based superalloys, which are specialized materials that have excellent high-temperature strength and good oxidation resistance, and hence are used in a wide range of technologies and applications. This award supports research to understand the fundamental relationships between processing and performance which will allow development of optimal additive manufacturing processes to fabricate nickel-based superalloy parts. An optimal process will enable the additively manufactured nickel-based superalloys to have excellent resistance to surface damage by high temperature oxidation while also retaining superior strength. Additively manufactured alloys have potential application in aerospace, automotive, biomedical, energy, and chemical industries. The results from this research therefore have the potential to benefit the U.S. economy and enhance manufacturing capabilities. Moreover, the research results will be incorporated into curriculum enhancement, student training, industrial collaboration, and an educational outreach program. Activities supported under this award will contribute to recruiting students from underrepresented groups to participate in research, and will positively impact higher education in science and engineering disciplines.The combination of high strength and superior oxidation resistance of nickel-based superalloys make these materials good candidates for high-temperature applications. Additively manufactured nickel-based superalloys can possess mechanical properties comparable to those produced by conventional manufacturing techniques, but their resistance to high temperature oxidation is not comparable to conventionally manufactured components. To enable the application of additive manufacturing for high-temperature alloy fabrication, this research aims to understand and predict the processing-microstructure-oxidation relationships for additive manufactured nickel-based superalloys. The research team will fabricate nickel-based superalloys in layered forms using the laser engineered net shaping additive manufacturing technique, perform microstructural analysis on the alloys using electron microscopy, predict the solidification microstructure of the additive manufactured Ni alloys using numerical modeling techniques, and measure the high-temperature oxidation performance of additive manufactured Ni alloys via thermogravimetric analysis. This research will provide knowledge for determination of a critical cooling rate below which the superior high-temperature corrosion properties can be maintained in the additive manufactured nickel-based superalloys.

添加剂制造或3D打印为有效的定制制造关键零件提供了巨大的机会。这种加工方法可以应用于基于镍的超合金，它们是具有出色高温强度和良好氧化耐药性的专业材料，因此在广泛的技术和应用中使用。该奖项支持研究，以了解处理与性能之间的基本关系，这将允许开发最佳的增材制造过程以制造基于镍的超合金零件。 最佳过程将使基于镍的超合金能够通过高温氧化对表面损伤具有极高的抗性，同时还可以保持较高的强度。加上合金在航空航天，汽车，生物医学，能源和化学工业中具有潜在的应用。因此，这项研究的结果有可能使美国经济受益并增强制造能力。此外，研究结果将纳入课程增强，学生培训，工业合作和教育外展计划中。根据该奖项支持的活动将有助于招募人数不足的群体的学生参与研究，并将对科学和工程学科的高等教育产生积极影响。高强度和基于镍的超级合金的高强度和优越的氧化耐药性的结合使这些材料良好的候选人良好的候选人候选人的候选者的结合高温应用。基于镍基的超合金可以具有与传统制造技术相当的机械性能，但是它们对高温氧化的耐药性与常规制造的组件不能媲美。为了使添加剂制造在高温合金制造中的应用，该研究旨在了解和预测基于镍制成的镍超合金的加工 - 微观结构氧化关系。研究团队将使用激光工程净成型增材制造技术以分层形式制造基于镍的超合金，使用电子显微镜对合金进行微结构分析，预测使用数值模型技术的添加剂制造的NI合金的固结微观结构，并测量通过热重分析，添加剂生产的Ni合金的高温氧化性能。 这项研究将提供知识，以确定关键冷却速率，在此基于添加剂制成的镍超合金中可以维持上等的高温腐蚀特性。