Al-Shahrani, Mechanical, Microstructure and Texture Characterization of API, X65 Steel, Mater. Zamani, Improved Mechanical Properties of Mild Steel via Combination of Deformation, Intercritical Annealing, and Quench Aging, Mater. Zhu, Mechanical Properties in Copper/Bronze Laminates: Role of Interfaces, Acta Mater., 2016, 116, p 43–52 Ma, High Tensile Ductility in a Nanostructured Metal, Nature, 2002, 419(2002), p 912–915 Al Nawwah, Development of Gradient Concentrated Single Phase Fine Mg-Zn Particles and Effect on Structure and Mechanical Properties, J. Tome, On the Impact of Grain Size Distribution on the Plastic Behaviour of Polycrystalline Metals, Model. Zhu, Combining Gradient Structure and TRIP Effect to Produce Austenite Stainless Steel with High Strength and Ductility, Acta Mater., 2016, 112, p 337–346ī. Zhu, In-Situ Observation of Dislocation Dynamics Near Heterostructured Interfaces, Mater. Ma, Manipulating the Powder Size to Achieve Enhanced Strength and Ductility in Harmonic Structured Al Alloy, Mater. Zhu, Heterogeneous Lamella Structure unites Ultrafine-Grain Strength with Coarse-Grain Ductility, Proc. Zhu, Heterogeneous Materials: A New Class of Materials with Unprecedented Mechanical Properties, Mater.
The heterogeneity in the microstructure, despite being single phase, led to a significant improvement in the tensile yield strength, ultimate tensile strength, ductility and toughness of the steel, with a marginal reduction in microhardness values. The quasi-polygonal ferrite was distributed in a heterogeneous form with a fine-grain shell surrounding the coarse-grained core. The heat treatment transformed the banded ferrite–pearlite microstructure of rolled steel to a quasi-polygonal ferrite microstructure, with the sporadic presence of austenite at the grain boundaries. The heat treatment process involved intercritical heating of the steel followed by high-temperature isotheral cooling, allowing for phase transformation, as well as alloying element partitioning.
In this study, a heterogeneous microstructure was developed for low-carbon microalloyed API X65 steel, the most commonly used pipeline steel for oil and gas transportation, using a heat treatment process. The microstructure plays a major role in the performance of metallic materials, which can be tailored through the composition and/or processing technique.
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