AHSS: A Multiresolution Analysis of the Particle Size and Interface Effects on the Strength and Ductility of Advanced High Strength Steels

本研究项目的主要目标是通过理论和计算模拟的结合，重点研究微观和纳米级夹杂物（颗粒）的尺寸和界面如何影响高级高强度钢（AHSS）的整体宏观性能，从而在不同长度尺度上对控制高强度钢（AHSS）强度和延性的强化（应变硬化）和微损伤演化（应变软化）机制有一个基本的了解。​这一目标将通过发展强大的多尺度理论和计算技术来实现，这些技术可用于有效预测微观结构特征对多相材料整体宏观力学性能的影响。该项目的结果将影响新一代AHSS的广泛开发和设计，这些AHSS预计将通过制造更轻、更强（即更长的寿命）的系统，广泛影响汽车、航空航天、基础设施、能源和国防技术。该研究项目还有望为新一代材料领域的本科和研究生教育以及微米和亚微米尺度的最先进计算能力提供实践经验。作为这项工作的直接结果，预计将有许多期刊文章发表，以及将举行许多研讨会和演讲。

The main objective of this research project is the development at different length scales a fundamental understanding of the strengthening (strain hardening) and micro-damage evolution (strain softening) mechanisms that control the strength and ductility of Advanced High Strength Steels (AHSS) through integration of theory and computational simulation focusing on how the sizes and the interfaces of micro- and nano-level inclusions (particles) influence the overall macroscopic properties of AHSS. This objective will be achieved by developing robust multi-scale theoretical and computational techniques that can be used to effectively predict the effects of microstructural features on the overall macroscopic mechanical properties of multi-phase materials.Results from this project will impact the widespread development and design of new generations of AHSS that are expected to broadly impact the automobile, aerospace, infrastructure, energy, and defense technologies by manufacturing lightweight and stronger (i.e. longer life) systems. This research project is also expected to provide hands-on experience for undergraduate and graduate education in the field of new generation materials and state-of-the-art computational capabilities at the micron and submicron length scales. As a direct result of this work, it is expected that numerous journal articles will be published, as well as numerous workshops and presentations will be made.