Fatigue behaviour of aluminium alloys after anodic and plasma-electrolytic oxidation

阳极和等离子体电解氧化后铝合金的疲劳行为

• 批准号: 435265960
• 负责人: Professor Dr.-Ing. Thomas Lampke
• 金额: --
• 依托单位: Professur Werkstoff- und Oberflächentechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/435265960?language=en
• 关键词: Fatigue; behaviour; aluminium; alloys; after

Electrochemical conversion treatments, such as anodic or plasma-electrolytic oxidation, are an effective method to enhance the corrosion and wear resistance of aluminium alloys. The type of conversion layer with the respective structure and properties directly influences the fatigue strength and the failure mechanisms under cyclic loading. This complex correlation between the adjustable system “substrate with anodic/ plasma-electrolytic oxide layer” and the fatigue properties is not fully understood yet. The aim of the proposed research project is to understand the effects of substrate and conversion layer microstructure, layer thickness as well as work hardening of the substrate surface and a post-treatment of the oxide layer on the high-cycle fatigue strength and the damage mechanisms. We focus on the correlation between a conversion layer, its microstructural properties and residual stresses and the fatigue performance, the crack initiation and the crack transition from the oxide layer into the substrate.

电化学转化处理，如阳极氧化或等离子电解氧化，是提高铝合金耐腐蚀性和耐磨性的有效方法，转化层的类型及其各自的结构和性能直接影响疲劳强度和循环失效机制。可调系统“具有阳极/等离子体电解氧化物层的基材”与疲劳特性之间的复杂关系尚未完全理解。拟议研究项目的目的是了解基材和转化的影响。层显微结构、层厚度以及基体表面的加工硬化和氧化层的后处理对高周疲劳强度和损伤机制的影响我们重点关注转换层、其显微结构性能和残余物之间的相关性。应力和疲劳性能、裂纹萌生以及裂纹从氧化层到基材的过渡。