About this Research Topic
Steel is a globally-used structural material and a major factor in advancing societies and economies. Advanced high-strength steels (AHSS), developed in the last few decades, are a class of steel particularly important to the automotive industry due to the increased demand of lightweight materials for fuel efficiency and high crash resistance for passive safety. AHSS have better combinations of strength (performance) and ductility (manufacturability), and higher crash resistances than conventional high-strength steels in conjunction with weight reduction of auto body structures. Keeping good ductility while increasing tensile strength requires development of new grades in which the strengthening mechanisms counteract the decrease in elongation. Understanding the relationships between the properties and the chemistry, microstructures, and processing techniques is pivotal to the development of AHSS. Important features of AHSS should be well understood and studied in order to completely characterize their service behaviors.
This Research Topic focuses on the latest development in high-strength low alloy (HSLA), dual-phase (DP), transformation-induced plasticity (TRIP), complex phase (CP), martensitic, twinning-induced plasticity (TWIP), quenched & partitioned (Q&P), medium manganese, TRIP-assisted bainitic ferrite (TBF), press-hardened steel (PHS), low-density, ultrafine grained/nanostructured steels and other AHSS concepts along with recent experiences with industrial implementation and end user application performance. The aim of this Research Topic is to highlight state-of-the-art research and development pertaining to AHSS to:
(a) advance the “chemistry-processing-structure-property” relation in AHSS;
(b) enhance the understanding of welding/joining behavior of AHSS as well as their potential service issues such as embrittlement induced by hydrogen and/or liquid metal (Zn);
(c) highlight novel design concept of AHSS, innovative processing technique and advanced characterization technique to promote the research and development of AHSS in both academia and industry.
We welcome submissions in the form of (Mini) Review, Research and Perspective articles, including but not limited to:
• new AHSS concepts, design optimization techniques, innovative steel processing techniques and advanced characterization techniques. Industrial examples of automotive design and application with AHSS are welcome;
• fundamental relations between steel processing techniques and formability as well as relations between microstructures and deformation mechanisms in the existing or newly developed AHSS;
• mechanisms of hydrogen embrittlement (HE) and liquid metal embrittlement (LME) in AHSS and strategies to improve their resistance to HE and LME; coating for AHSS;
• welding/joining behaviors of AHSS and new welding/joining techniques;
• advanced experimental, modeling and simulation to further our understanding of the performance of AHSS (in mechanical testing including crash test).
Topic Editor Dr. Zhao is employed by ArcelorMittal USA LLC.
The other Topic Editors declare no conflict of interest with regard to the Research Topic theme.
Keywords: advanced high-strength steels, strength and ductility, automotive, delayed fracture and LME, welding
Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.