Investigation of the Micro-Mechanical Phenomena Operative during Elevated Temperature Forming and in the As-Received (and As-Formed) Condition of Novel Automotive Light Weighting Metals

新型汽车轻质金属高温成形过程中以及收到（和成形）状态下的微机械现象研究

• 批准号: RGPIN-2017-05195
• 负责人: Bardelcik, Alexander
• 金额: $ 1.68万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=753170
• 关键词: Investigation; Micro; Mechanical; Phenomena; Operative

Increasingly stringent fuel economy and emissions standards have driven the automotive industry to improve vehicle efficiency in an effort to meet the corporate average fuel economy (CAFE) target of 54.5 mpg (by 2025) as mandated by the Obama administration. This has spurred a recent and significant increase in Rare the focus of the proposed Discovery research program, which will investigate the effect of elevated temperature forming and room temperature deformation on the micro-mechanical behaviour of these materials. The objectives of the proposed research will address:(1) The effect of phase transformations, triaxiality and elevated temperature deformation on the micro-mechanical behaviour of aluminum alloys during warm forming(2) The effect of multi-phase interaction and damage evolution of light weighting metals(3) The development of representative volume element (RVE) finite element models to simulate the measured constitutive and fracture behaviour of the light weighting metalsState-of-the-art in-situ mechanical testing will be conducted within a nanometer resolution field emission scanning electron microscope (FE-SEM) to investigate the effect of (i) multi-phase microstructures (ii) temperature (iii) stress-state (triaxiality) (iv) strain rate and (v) phase-transformations on the micro-mechanical behavior of these materials. The experimental results will then lead to the development of RVE finite element models to simulate the constitutive and fracture behavior of these light weighting processes metals. The characterization results and RVE models will be adopted by industry (material producers, parts manufacturers, car makers) to improve the advanced manufacturing processes and enhanced the in-service performance of light weighted parts. Long term, vehicle light weighting will benefit our health and the environment through reduced emissions and the advancement of light weighting technologies will also benefit our economy, by securing Canada's strength as advanced manufacturers.

越来越严格的燃油经济性和排放标准驱动了汽车行业提高车辆效率，以实现Obama政府规定的54.5 MPG（到2025年）的公司平均燃油经济性（CAFE）目标。这刺激了最罕见的罕见焦点，该计划的重点将研究升高温度形成和室温变形对这些材料微机械行为的影响。拟议研究的目标将解决：（1）相变，三轴性和温度变形升高对铝合金在温暖形成过程中微机械行为的影响（2）多相相互作用和光的损害演变的影响加权金属（3）代表体积元件（RVE）有限元模型的开发，以模拟光权重金属的测量构成和断裂行为，将在纳米分辨率的场地内进行现场机械测试扫描电子显微镜（FE-SEM）研究（i）多相显微结构（II）温度（III）应力态（三轴性）（iv）应变速率和（v）相位转换的影响这些材料的行为。然后，实验结果将导致RVE有限元模型的开发，以模拟这些轻巧加权过程的本构和断裂行为。表征结果和RVE模型将由行业（材料生产商，零件制造商，汽车制造商）采用，以改善先进的制造工艺并增强轻度加权零件的服务性能。从长远来看，车辆轻巧将通过减少的排放来使我们的健康和环境受益，而轻巧技术的进步也将通过确保加拿大作为高级制造商的实力来使我们的经济受益。