In situ digital image speckle correlation (DISC) observation of plastic strain increment in low-carbon steel

Abstract

The present work is aimed at studying the macroscopic localization of plastic strain in low-carbon steel AISI A283 Grade C. The evolution of macroscopically localized plastic strain at various stages of strain hardening is visualized via a Digital image speckle correlation (DISC) method. The processing of stress-strain curves of the steel samples enabled one to distinguish the following stages of strain hardening: the yield point, the parabolic hardening, and the pre-failure. The inspection of local strain distributions reveals that the parabolic work hardening is presented by a system of stationary plastic strain centers placed at equal distances. To perform a comprehensive analysis of local elongations from the parabolic work hardening toward the pre-failure stage, the total elongation components were measured at the strain centers. The average total elongation is found to be almost constant at the parabolic work hardening, but abruptly increases when approaching the pre-failure stage. The plastic strain instability is highlighted, as well, by the rising total elongation (amplitude) at the strain sites.

A Combination of Chaotic Harris Hawks Optimizer‐Stacking Model and Kernel Density Estimation Method for Pressing Force Prediction During Slab Sizing Press Process

“…The rolling force, as well as the pressing force, is influenced by geometric, mechanical, and physicochemical factors. As Figure 6 shows, geometric factors include slab width and thickness, [ 44,45 ] and the mechanical factor is determined by the internal stress state of the deformation zone, which is related to the width reduction and thickness. The physicochemical factors are represented by the deformation resistancewhere T is the deformation temperature, u is a factor determined by the material compositions, ε denotes the deformation degree, which is influenced by the shape of the slab and anvil as well as width reduction.…”

Sustainable Ironmaking Toward a Future Circular Steel Economy: Exploiting a Critical Oxygen Concentration for Metallurgical Cu Removal from Scrap‐Based Melts

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Characterisation of the galvanic protection of zinc flake coating by spectroelectrochemistry and industrial testing

“…In addition to these technologies, zinc flake coatings are increasingly being used in several markets including automotive, renewable energy and construction industries. [ 1–4 ]…”