As one of promising candidate materials for fuel claddings and structural components in the Gen-IV fission reactors, FeCrAl(Zr)-ODS ferritic steels were studied to well understand radiation hardening behavior. Nanoindentation (NI) hardness plastically deformed zone (PDZ), geometrically necessary dislocations (GNDs) as microstructures investigated two irradiated with 6.4 MeV Fe3+ at room tempera...

The present study designed two kinds of Fe-18Mn-1.3C-2Cr-(4, 11)Al (wt.%) low-density steels. Tensile and impact tests were carried out to evaluate the work hardening toughness properties via aluminum (Al) alloying control. Meanwhile, microstructure evolution fracture morphology investigated by X-ray diffraction (XRD), a scanning electron microscope (SEM) equipped with backscatter (EBSD), trans...

This work investigated hydrogen trapping and embrittlement (HE) in two press-hardened steels, 22MnB5 for 1,500 MPa grade 34MnB5V 2000 grade, respectively. Superior to the steel, newly developed steel has an ultimate tensile strength of over without sacrificing ductility due formation vanadium carbides (VCs). Simulated press hardening was applied induced by cathodic charging. Susceptibility HE v...

Interest in the use of wire arc additive manufacturing (WAAM) construction has increased rapidly recent years. Key to facilitating wider application is an improved understanding material behaviour. In particular, with structural design by finite element analysis mind, constitutive models describe full range stress-strain response WAAM steels are needed; development such focus present study. nor...

An artificial neural network (ANN) model was designed to predict the tensile properties in high-strength, low-carbon bainitic steels with a focus on fraction of constituents such as PF (polygonal ferrite), AF (acicular GB (granular bainite), and BF (bainitic ferrite). The input parameters were constituents, while output composed yield strength, yield-to-tensile ratio, uniform elongation. ANN ex...

Custom 450 stainless steel and AM 350 are both precipitation hardening steels, which widely used in a variety of aerospace applications. The former exhibits very good corrosion resistance with moderate strength, whereas the latter is for applications requiring high strength along resistance. In this study, behavior CUSTOM steels passivated (a) citric acid (b) nitric solutions 50 75 min at 49 70...

Microstructure transformation due to thermomechanical processing has an acute effect the macroscopic properties of low-carbon steels. This includes viscoplastic deformation and phase transformations. Hot forming processes such as press hardening are particularly affected. Most engineering applications require a combination high strength sufficient residual ductility, which can be achieved by de...

Abstract In the framework of a research project, tooth root bending strength high-strength gears is investigated. The most common type failure encountered with these shot-peened, case-hardened breakage caused by crack initiation below surface at non-metallic inclusion (fisheye failure). However, it well known that case-hardening depth and quenching grain size can have great influence on gear’s ...

Steels are multiphase alloys with an increasingly complex constitution. This complexity of steel microstructures has been recognized since the birth physical metallurgy. Non-metallic inclusions have also very early as relevant to understanding behavior. With advances in precipitation hardening and grain size control, many precipitate phases gained importance design. Around 1950-70 term “secon...