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.

铸铝圆柱体块已取代铸铁块，减轻了40％的重量。为了在孔时获得耐磨性，圆柱体内通常使用2毫米厚的铸铁衬里。最近，铁/钢粉的热喷涂涂层通过在圆柱孔和活塞之间提供200微米厚的界面，从而提供了无衬垫的圆柱体，从而进一步减轻了重量。但是，涂层的特性，其性质，粘合机制以及钢涂层/铝底物界面特性和特性尚无和理解。 这些属性在计算机辅助设计（CAE）和集成的计算材料工程（ICME）中至关重要。 在这个项目中，将研究热喷雾缸的机械行为。这项研究将确定涂料，底物和界面的微观结构特征。并将在准静态和循环负载下获得涂料，界面和底物的机械性能。将研究涂层的潜在故障机制，包括分层和/或裂纹。该研究将在涂层微结构，热喷雾工艺和涂料特性之间建立联系。