Optimizing the Bendability of Advanced High Strength Steels for Automotive Applications

优化汽车应用先进高强度钢的弯曲性能

• 批准号: 543931-2019
• 负责人: Wilkinson, DavidDS
• 金额: $ 3.64万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 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=758237
• 关键词: Optimizing; Bendability; Advanced; Strength; Steels

This project aims to improve the competitiveness of ArcelorMittal Dofasco within the North American automotive supply chain for advanced high strength steel sheet. It does so by addressing a key materials validation requirement imposed by most automotive OEMs and parts suppliers, namely that the steel offer sufficient bendability as measured by standard tests. As the automotive industry moves towards the use of stronger steels, thereby enabling vehicle weight reduction, it must tolerate the concomitant reduction in ductility. This limits the bendability of the material. Developing materials that meet these stringent requirements requires a robust understanding of the microstructural parameters that control sheet bendability. Moreover, new materials developed will be enhance if a clear link can be drawn between bendability and properties that can be measured in a standard tensile test. This project will address both goals through a detailed experimental study of damage and fracture in both tension and bending, using a sophisticated array of in-situ and ex-situ approaches. The materials of interest are a range of steels, all with a nominal strength of 980 MPa but with very different underlying microstructures. The experimental results will provide a robust understanding of the relationship between the underlying microstructure and bendability. The data will then be used as input into a multi-dimensional macro-micro model from which bendability will be predicted based on a knowledge of the microstructure and tensile test properties.

该项目旨在提高北美汽车供应链中Arcelormittal Dofasco的竞争力，以实现高级高强度钢板。 它通过解决大多数汽车OEM和零件供应商施加的关键材料验证需求，即钢的弯曲性足够，如标准测试所测量。 随着汽车行业朝着使用更强壮的钢的使用，从而降低了车辆的重量，它必须忍受延性降低。 这限制了材料的弯曲性。 开发满足这些严格要求的材料需要对控制表弯曲性的微观结构参数有牢固的了解。 此外，如果可以在标准拉伸测试中测量的弯曲性和属性之间达成明确的联系，则开发的新材料将得到增强。 该项目将使用一系列精致的现场和前态方法进行详细的实验研究，以详细的实验研究对张力和弯曲的损害和骨折。 感兴趣的材料是一系列钢，它们的标称强度为980 MPa，但潜在的微观结构非常不同。 实验结果将为基础微结构与弯曲性之间的关系提供强有力的理解。 然后，数据将用作多维宏观宏观模型的输入，根据微观结构和拉伸测试属性的知识，可以从中预测弯曲性。