Quasi-static, cyclic and fracture characteristics of thermal sprayed AlSi cylinder bore

热喷涂AlSi缸膛的准静态、循环和断裂特性

• 批准号: 536291-2018
• 负责人: Jahed, Hamid
• 金额: $ 8.01万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=698880
• 关键词: Quasi; static; cyclic; fracture; characteristics

Cast aluminum cylinder blocks have replaced cast iron blocks to gain a 40% reduction in weight. To attain wear resistance at the bore, 2-mm thick cast iron liners are commonly used inside the cylinder. Recently, thermal spray coating of iron/steel powder has offered a liner-less cylinder by providing a 200-micrometer thick interface between the cylinder bore and the piston, providing a further reduction of weight. However, the characteristics of the coating, its properties, bonding mechanisms, and steel coating/aluminum substrate interface characteristics and properties are not available and/or well understood. These properties are of paramount importance in computer aided design (CAE), and integrated computational materials engineering (ICME). In this project, the mechanical behavior of thermal spray coated cylinders will be studied. This study will identify the microstructural characteristics of the coating, substrate, and interface; and will obtain the mechanical properties of the coating, interface and substrate under quasi-static and cyclic load. Potential failure mechanisms of the coating including delamination and/or cracking will be studied. The study will establish a link between coating microstructure, thermal spray process, and coating properties.

铸铝缸体取代了铸铁缸体，重量减轻了40%。为了在缸膛处获得耐磨性，通常在气缸内使用2毫米厚的铸铁衬套。最近，铁/钢粉末热喷涂涂层通过在缸膛和活塞之间提供200微米厚的界面，提供了一个无衬垫的气缸，进一步减轻了重量。然而，涂层的特性、性能、结合机制以及钢涂层/铝基材界面的特性和性能尚不清楚。这些特性在计算机辅助设计（CAE）和综合计算材料工程（ICME）中至关重要。