A new paradigm for creating fatigue-resistant light metals

创造抗疲劳轻金属的新范例

• 批准号: DP150101577
• 负责人: Prof Christopher Hutchinson
• 金额: $ 28.9万
• 依托单位: Monash University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2015
• 资助国家: 澳大利亚
• 起止时间: 2015-01-01 至 2019-09-01
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP150101577
• 关键词: new; paradigm; creating; fatigue; resistant

Ninety per cent of failures of metal components are caused by fatigue. Fatigue arises from cycles of alternating stress during service which lead to failure at stress levels surprisingly short of the material's static strength. Fatigue is the 'Achilles heel' of complex engineering alloys and places significant limitations on adopting new lightweight solutions for improvements to fuel efficiency in transportation. Aluminium alloys in particular have notoriously poor fatigue performance. This project aims to develop a new class of fatigue resistant light alloys whose properties improve, rather than deteriorate, during service. This development is based on a new understanding of the coupling of microstructure evolution and deformation.

金属部件百分之九十的故障都是由疲劳引起的。疲劳是由使用过程中交变应力的循环引起的，这会导致在应力水平远远低于材料静态强度的情况下发生故障。疲劳是复杂工程合金的“阿喀琉斯之踵”，它对采用新的轻量化解决方案来提高交通运输的燃油效率造成了很大的限制。众所周知，铝合金的疲劳性能尤其差。该项目旨在开发一种新型抗疲劳轻合金，其性能在使用过程中得到改善而不是恶化。这一进展基于对微观结构演化和变形耦合的新理解。