INTRODUCTION White Structure Flaking (WSF) is a type of surface damage responsible for some early failures in wind turbine gearbox bearings. WSF has been associated with microstructural changes registered close to the damaged surface that appear to be white after etching, hence the name White Etching Areas (WEAs). Local hydrogen liberation from lubricants [2] and adiabatic shear bands [3] have...

The grain structure of metals changes significantly during severe plastic deformation (SPD), and refinement is the main process associated with SPD at low homologous temperatures. Products made ultrafine-grained materials exhibit improved performance characteristics are considerable industrial interest, which generates a need for creation comprehensive models. This paper considers integration E...

The purpose of this study was to evaluate the corrosion behavior 1010 steel processed by Equal Channel Angular Pressing (ECAP), a technique that induces severe plastic deformation (SPD) in materials. samples were one and two passes ECAP throught routes A C. using potentiodynamic polarization electrochemical impedance spectroscopy, NaCl (pH= 6.5) sodium hydroxide/sodium phosphate 10.5) solutions...

The deformation behavior of nearly fully pearlitic, bainitic and martensitic steels during severe plastic is summarized in this paper. Despite their significantly different yield stresses microstructures, hardening SPD similar. Due to the enormous capacity limited by strength tool materials. microstructure at obtainable limit strain are quite similar, which a nanocrystalline structure order 10 ...

The influence of strain rate on the mechanical response two different nanostructured pure coppers was investigated under uniaxial compression. first copper elaborated by powder metallurgy using Spark Plasma Sintering (SPS) process. second Severe Plastic Deformation (SPD). Conventional characterizations were conducted with quasi-static compression and tensile tests, hardness tests and, microstru...

Abstract In order to study the effects of coarse grain size and Ni content on mechanical properties, molecular dynamics (MD) simulation nanocrystalline (NC) Ni-W alloys with bimodal structure is carried out. The NC samples are established by embedding into fine matrix. solute atoms in segregated boundary affected zone (GBAZ) through severe plastic deformation (SPD). uniaxial tensile shows that ...

A damage evolution law is proposed to consider the frictional behavior within an Eulerian material after full as a Lagrangian material, where mesh explicitly describes newly born interface interactions. This approach prominent for simulating severe plastic deformation (SPD) processes during which separation can occur. Among these, orthogonal cutting represents simplest process comparison with s...

Shot peening (SP), as one of the severe plastic deformation (SPD) methods is employed for surface modification of the engineering components by improving the metallurgical and mechanical properties. Furthermore artificial neural network (ANN) has been widely used in different science and engineering problems for predicting and optimizing in the last decade. In the present study, effects of conv...

Abstract Grain refinement by severe plastic deformation (SPD) techniques, as a mechanism to control microstructure (recrystallization, grain size changes,…) and mechanical properties (yield strength, ultimate tensile strain, hardness variation…) of pure aluminium conductor wires, is topic great interest for both academic industrial research activities. This paper presents an innovative finite e...

It is generally known that severe plastic deformation processes with back pressure not only apply higher hydrostatic stress and more deformation compared to what a regular process can apply to a workpiece but also prevent surface defects in the workpiece during the process. Hydrostatic cyclic expansion extrusion (HCEE) was developed recently for processing long ultrafine-grained metals and allo...