G20Mn5QT steel, crack initiation mechanism, fatigue strength, size effect, shape effect, 35CrMo steel, high-cycle fatigue, damage mechanism, fatigue strength prediction, heat treatment, Mg-Zn-Ca alloy, twin boundary, solute cluster hardening, molecular dynamics simulation, seamless steel tubes, residual stress, finite element simulation, heat transfer coefficient, cooling intensity, strain rate, mechanical property, austenitic low-density steel, strain hardening, microstructure, deformation mechanism, special-shaped epoxy steel sleeve, low-strength tee, strain monitoring, stress concentration, grain boundary engineering, face-centered cubic metal, special grain boundary, annealing twin, mini-CT, ductile-to-brittle transition range, reference temperature, master curve, fatigue, titanium, electron beam melting, process defects, damage initiation, low-carbon steel, Poisson’s ratio, digital image correlation, plastic deformation, discontinuous yielding, film cooling hole, electrical discharge machining, recast layer, Technology: general issues, History of engineering and technology, Materials science

The reprint has collected the latest scientific achievements in the microstructure-related deformation and fracture behavior of various metallic materials (e.g., steels, superalloys, and titanium alloys) under monotonical or cyclic loads. According to the research findings arising from this collection of works, the initial microstructure and microstructural evolution have a significant effect on deformation and fracture mechanisms and, thus, mechanical properties. To understand these influences, microstructure characterization, mechanical property testing, and numerical simulation are discussed in this reprint. These results are beneficial for promoting the potential applications of these materials and for the future development of novel high-performance metallic materials.