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

基本信息

批准号：
543931-2019
负责人：
Wilkinson, David
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：
2021
资助国家：
加拿大
起止时间：
2021-01-01 至 2022-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=720837
关键词：
Optimizing Bendability Advanced Strength Steels

项目摘要

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.

该项目旨在提高安赛乐米塔尔Dofasco在北美汽车先进高强度钢板供应链中的竞争力。它通过满足大多数汽车原始设备制造商和零部件供应商提出的关键材料验证要求来实现这一目标，即钢材具有通过标准测试测量的足够的弯曲性。随着汽车工业转向使用更坚固的钢材，从而减轻车辆重量，它必须容忍随之而来的延展性下降。这限制了材料的可弯曲性。开发满足这些严格要求的材料需要对控制板材弯曲性的微观结构参数有深入的了解。此外，如果能够在弯曲性和可在标准拉伸测试中测量的性能之间建立明确的联系，那么开发的新材料将会得到增强。该项目将使用一系列复杂的原位和异位方法，通过对拉伸和弯曲损伤和断裂进行详细的实验研究来实现这两个目标。感兴趣的材料是一系列钢，所有钢的标称强度均为 980 MPa，但底层微观结构却截然不同。实验结果将提供对底层微观结构和可弯曲性之间关系的深入理解。然后，这些数据将被用作多维宏观微观模型的输入，根据微观结构和拉伸测试特性的知识，可以预测弯曲性。