Over many decades, significant efforts have been made to improve the strength-elongation product of advanced high strength steels (AHSSs) by creating tailored multi-phase microstructures. Successive solid-state phase transformations for steels with a well selected chemical composition turned out to be the key instrument in the realisation of such microstructures. In this contribution, we first provide a brief review of the desired microstructures for Transformation-induced plasticity (TRIP), Carbide-free Bainitic (CFB), Quenching & Partitioning (Q&P) and Medium Manganese steels followed by comprehensive discussions on the phase transformations to be used in their creation. The implications for the steel composition to be selected are addressed too. As the presence of the right amount and type of metastable retained austenite (RA) is of crucial importance for the mechanical performance of these AHSSs, special attention is paid to the important role of successive solid-state phase transformations in creating the desired fraction and composition of RA by suitable element partitioning (in particular C and Mn). This critical partitioning not only takes place during final cooling (austenite decomposition) but also during the back transformation (austenite reversion) during reheating.

This review aims to be more than just descriptive of the various findings, but to present them from a coherent thermodynamic / thermo-kinetic perspective, such that it provides the academic and industrial community with a rather complete conceptual and theoretical framework to accelerate the further development of this important class of steels. The detailed stepwise treatment makes the review relevant not only for experts but also metallurgists entering the field.

几十年来，通过创建量身定制的多相微结构，人们为提高高级高强度钢（AHSS）的强度-伸长率产品做出了巨大的努力。具有良好化学成分选择的钢的连续固态相变被证明是实现这种微观结构的关键工具。在这项贡献中，我们首先简要介绍了相变诱导塑性（TRIP），无碳化贝氏体（CFB），淬火和分配（Q＆P）和中锰钢所需的显微组织，然后对相转变为用于创作。还解决了要选择的钢成分的含义。由于正确数量和类型的亚稳残留奥氏体（RA）的存在对于这些AHSS的机械性能至关重要，因此，应特别注意连续固态相变在产生所需馏分和成分中的重要作用。通过适当的元素分配（特别是碳和锰）来确定RA的含量。这种关键的分配不仅发生在最终冷却（奥氏体分解）期间，而且还发生在再加热期间的逆相变（奥氏体回复）期间。

这篇综述的目的不仅仅是描述各种发现，而是从连贯的热力学/热动力学观点介绍它们，从而为学术界和工业界提供一个相当完整的概念和理论框架，以加速进一步的发展。重要的一类钢材。详细的分步处理使得该评论不仅与专家有关，而且与进入该领域的冶金学家有关。