Microstructure Engineering of High-Performance Steels

摘要: Microstructure evolution during steel processing assumes a critical role in tailoring mechanical properties, e.g., the austenite–ferrite transformations are key metallurgical tool to improve properties of advanced low-carbon steels. engineering is concept that links parameters by accurately modeling microstructure evolution. Systematic experimental laboratory studies provide basis for model development and validation. Laser ultrasonics, dilatometry, range microscopy techniques (including electron backscatter diffraction mapping) used characterize recrystallization, grain growth, phase transformations, precipitation high-performance Based on these studies, suite state variable models proposed. Examples their applications given intercritical annealing automotive sheets welding high-strength line pipe grades. The extension scale illustrated using field approach. Here, emphasis placed simulating austenite decomposition into complex ferrite–bainite microstructures. challenges opportunities develop next-generation process will be discussed.