the effect of pre-existing nano sized precipitates on the mechanisms and rate of grain refinement has been investigated during the severe plastic deformation. a binary al–0.2sc alloy, containing coherent al3sc particles, of 3.62 nm in diameter has been deformed by accumulative roll bonding up to 10 cycles. the resulting deformed structures were quantitatively analyzed using electron backscatter...

The microstructural evolution of interstitial-free (IF) steel subjected to Φ = 90° Equal Channel Angular Extrusion (ECAE) for up to 4 passes via routes A, BA, C and up to 8 passes via routes BC was studied using Electron Back-Scatter Diffraction (EBSD). Routes BC and BA recorded the smallest grain size and aspect ratios and the largest average misorientation and area fraction of high-angle grai...

An austenitic stainless steel with 6 wt% Si and multiple secondary phases was produced the aim to achieve enhanced plasticity during hot deformation. The microstructure of after fracture characterized via electron back-scattered diffraction, transmission Kikuchi diffraction scanning microscopy. From tail gage necking region, material evolved from low-angle grain boundaries (LAGBs) mixtures LAGB...

Welding is an essential fabrication step during the construction of pipelines using high-strength low-alloy steels. The base metal experiences a rapid thermal excursion in heat-affected zone, resulting modification microstructure and mechanical properties. In particular, coarse-grain zone closest to weld pool significance for integrity pipelines. present work, hardness were quantified from labo...

Controlling grain size in polycrystalline nickel base superalloy is vital for obtaining required mechanical properties. Typically, a uniform and fine grain size is required throughout forging process to realize the superplastic deformation. Strain amount occupied a dominant position in manipulating the dynamic recrystallization (DRX) process and regulating the grain size of the alloy during hot...

The wear and rolling contact fatigue (RCF) performance of eutectoid hypereutectoid rail steels were studied. Subsequently, the microstructure evolutions subsurface materials these two after testing comparatively investigated. results indicated that, compared with rail, had lower loss, but longer RCF crack lengths. After rolling-sliding testing, original equiaxed undeformed coarse grains rails i...

This study presents a comprehensive evaluation of the effects multi-channel spiral twist extrusion (MCSTE) processing on mechanical properties and structural evolution AA5083. The texture developed were mapped by electron backscatter diffraction (EBSD) for three successive passes compared with an as-annealed plate. An hardness tensile was presented correlated EBSD findings. displayed results re...

The precipitation behavior and microstructural evolution of α phase in a novel metastable β-type Ti alloy, Ti-10Mo-6Zr-4Sn-3Nb (wt.%), during isothermal compression are investigated this study through the use SEM (scanning electron microscope), TEM (transmission microscope) (HRTEM) (high-resolution transmission microscopy) EBSD techniques. results show that some finer precipitates randomly dist...