Aerospace Al alloy cold spray coating performance under fatigue and corrosion environments

航空航天铝合金冷喷涂涂层在疲劳和腐蚀环境下的性能

• 批准号: 2889819
• 金额: --
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2889819
• 关键词: Aerospace; Al; alloy; cold; spray

Cold spray is a repair process that can be considered an additive repair process, whereby metal powder particles are impacted at high speed in a carrier gas, at relatively low temperatures, so the repaired surface layer is formed by extreme deformation rather than melting and solidification. The evolving microstructures and the residual stress states between the substrate and new coating layer mean CS structures are not currently used in highly stressed locations as their mechanical performance is not well understood. A better understanding of how the micromechanical processes in this layered system controlling fatigue and corrosion interactions is needed. This is part of a larger research project supported by Airbus Operations, in collaboration with Coventry UniversityThis project will use advanced microstructural characterization techniques (SEM, EBSD, EDX, TEM and X-ray CT) to analyse the evolution of the CS microstructure and defect distributions, and will also investigate full field experimental mechanics approaches (e.g. DIC and EC-AFM) to evaluate strain evolution and corrosion processes under fatigue loading and in the presence of corrosion service conditions.

冷喷雾剂是一种可以认为是添加剂修复过程的维修过程，在相对较低的温度下，金属粉末颗粒会在载气中高速影响金属粉末颗粒，因此修复后的表面层是由极端变形而不是熔化和固化形成的。底物和新涂层之间不断发展的微观结构和残留应力状态意味着CS结构目前尚未在高应力的位置使用，因为其机械性能尚不清楚。需要更好地了解该分层系统中如何控制疲劳和腐蚀相互作用的微机械过程。 This is part of a larger research project supported by Airbus Operations, in collaboration with Coventry UniversityThis project will use advanced microstructural characterization techniques (SEM, EBSD, EDX, TEM and X-ray CT) to analyse the evolution of the CS microstructure and defect distributions, and will also investigate full field experimental mechanics approaches (e.g. DIC and EC-AFM) to evaluate strain evolution and corrosion processes under疲劳负荷并在腐蚀条件下。