Defect formation in light metal alloy castings

轻金属合金铸件缺陷的形成

• 批准号: 336849-2006
• 负责人: Cockcroft, Steven
• 金额: $ 11.29万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=361869
• 关键词: Defect; formation; light; metal; alloy

Despite their many advantages, castings produced from aluminum alloys are prone to a number of solidification related defects include macro- and micro-void formation and oxide film entrainment, which if present in structural components can result in reduced fatigue and impact performance. In the case of wheels these defects can also result in cosmetic defects on the surface of the wheel.This proposal describes a Strategic Project in the area of Competitive Manufacturing and Value-Added Products and Processes with focus on Near-Net-Shape Casting Processes. This research proposal focuses on porosity and oxide film formation in aluminum alloy near-net shape casting and combines both experiments, and state-of-art numerical modeling. The experimental program will be aimed at: 1) generating an improved fundamental understanding of porosity and oxide film defect formation; and 2) providing data suitable for validation of the numerical models to be developed in the program. The numerical modeling will be aimed at: 1) helping to design the experimental program and interpret the results; and 2) provide tools for use by industry to minimize the occurrence of these critical defects. The program, run in partnership with Canadian Autoparts Toyota and Alcan, will contribute to the training of 3 Doctoral students, a Master of Applied Science student and a Post-Doctoral Fellow.

尽管具有许多优点，但由铝合金生产的铸件容易出现许多与凝固相关的缺陷，包括宏观和微观空隙形成以及氧化膜夹带，如果存在于结构部件中，则会导致疲劳和冲击性能降低。在车轮的情况下，这些缺陷也可能导致车轮表面的外观缺陷。本提案描述了一个战略项目，该项目在竞争力制造和增值产品和工艺领域，重点是近净形铸造工艺。本研究计画以铝合金近终形铸造中之气孔与氧化膜形成为研究重点，并结合实验与最新之数值模拟。该实验计划的目的是：1）产生一个改进的孔隙度和氧化膜缺陷形成的基本理解;和2）提供数据，适用于验证的数值模型中开发的程序。数值模拟的目的是：1）帮助设计实验程序并解释结果; 2）提供工业使用的工具，以尽量减少这些关键缺陷的发生。该计划与加拿大汽车零部件公司丰田和加拿大铝业公司合作，将有助于培养3名博士生，一名应用科学硕士生和一名博士后研究员。