1-13、多尺度材料集成计算指导的高强钢结构–性能–工艺的定制化设计

Design of tailored microstructure, properties and processes: towards an ICME guided concept

Junhe Lian^1,2,3,* (连军贺), Wenqi Liu², Ioanna Papadioti⁴, Ilias Bellas⁴, Sarath Chandran⁵, Patricia Verleysen⁵, Helmut Richter⁶, Nikolaos Aravas⁴, Sebastian Münstermann²

1.Steel Institute, RWTH Aachen University, Intzestraße 1, 52072 Aachen, Germany

2.Department of Mechanical Engineering, Aalto University, Otakaari 4, 02150 Espoo, Finland

3.Impact and Crashworthiness Lab, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA

4.Department of Mechanical Engineering, University of Thessaly, Leoforos Athinon, Pedion Areos, 38334 Volos, Greece

5.Department of Materials Science and Engineering, Ghent University, Technologiepark Zwijnaarde 903, 9052 Zwijnaarde, Belgium

6.thyssenkrupp Steel Europe AG, Kaiser-Wilhelm-Straße 100, 47166 Duisburg, Germany

摘要：We develop and apply the integrated multiscale modelling strategies in the field of modern material design for optimized microstructures with tailored mechanical property profiles in precisely pre-defined engineering applications. For decades, the approaches to developing new materials are based on experience or empirical knowledge. However, nowadays, the materials development is challenged by the ever-increasing, partially contradictory mechanical property requirements that have to be provided after the industry development cycles of ever decreasing length. Therefore, our approach aims to provide provides a knowledge-based, reliable, and efficient alternative for microstructure design and property optimization.

The modelling strategy is to build a directional chain of models working on different length scales (micro, meso and macro scale) and enable their communications and interactions quantitatively linking all the scales. On the micro and meso level, it employs the crystal plasticity model to tackle deformation at the grain and sub-grain level. Model parameters are typically calibrated in either single crystal based nanoindentation test or by the RVE-based virtual laboratory. On the macroscopic level, the mechanism informed macroscopic model is developed for its practical simplicity and numerical efficiency. This approach has been successfully applied to investigating the texture evolution induced anisotropic hardening and yield locus distortion, and upscaling damage from micro to macro scale. By applying sensitivity study or optimization procedures, the approach has also provided guidelines in the applications of texture design for better formability, damage tolerance design for crashworthiness, crack arrest behaviour of pipeline steels, etc.

关键词：ICME; Microstructure design; Damage tolerance; High-strength steels

通讯作者：Junhe Lian(连军贺)，Tel: +358 50 477 0765，Email: junhe.lian@aalto.fi; junhe.lian@iehk.rwth-aachen.de; lianjh@mit.edu

DOI:10.12110/secondfmge.20181014.113