Twinning induced plasticity (TWIP) steels with high manganese percentage (17-35%), are mostly used in automotive bodies. Their microstructure at room temperature is austenitic, and due to the low stacking fault energy, major deformation mechanism in them is twinning inside austenite grains which leads to enhanced mechanical strength in the steel. Due to the important effect of heat treatment pr...

Understanding of the mechanisms of annealing twin formation is fundamental for grain boundary engineering. In this work, the formation of annealing twins in a 304L austenitic stainless steel is examined in relation to the thermo-mechanical history. The behavior of annealing twins of various morphologies is analyzed using an in-situ annealing device and EBSD. The results confirm that there is a ...

Presence of coherent interfaces within crystallites, referred to as «annealing twins,» has many effects on the properties of several fcc metals and alloys. The mechanism of the formation of these twins have been subject of numerous studies over fifty years. Although much progress has been made in recent years, a universally accepted view on the formation of these twins has not yet emerged. This...

The effects of prior stored energy level, annealing temperature, heating velocity, and initial grain size on annealing twin development during static recrystallization of commercially pure nickel (99.999 %) are investigated. The twin content (measured as the twin boundary density or as the number of twins per grain) at the end of recrystallization is shown to be primarily influenced by the prio...

Grain growth experiments were performed on InconelTM 718 to investigate the possible correlation of the annealing twin density with grain size and with annealing temperature. Those experiments were conducted at different temperatures in the supersolvus domain and under such conditions that only capillarity forces were involved in the grain boundary migration process. In the investigated range, ...

In the current study, the recrystallization behavior of 75% cold-rolled Fe-22Mn-10Al-1.4C steel during annealing at 750, 770, 790, 810, and 830°C was studied. X-ray diffraction patterns and optical microscopy were used to characterize microstructures. The Vickers Micro-hardness test was used to characterize recrystallization kinetics during annealing. Johnson-Mehl-Avrami-Kolmogorov (JMAK) model...

Here we reveal and discuss the relationship among microstructures, textures, mechanical behaviors of Al 0.1 CoCrFeNi high-entropy alloys (HEAs) after cold rolling annealing. The initially coarsen grains display profuse lamellar-structured slip bands upon to 50% reduction with mostly extending vertically direction. Meanwhile, facilitates evolutions Goss ({011} <100>) Brass ({110} <112>) componen...

Dislocation behaviour of a twinning-induced plasticity (TWIP) steel subjected to high-cycle fatigue tests is investigated in the present study. Grain boundaries are important sources dislocation generation during tests, contributing increase density. Continuous emission dislocations from grain observed many grains. Inclusions can sustain large pile-ups at inclusion interfaces, leading high stre...

This work addresses the early stages (≤1000 h) of dissolution corrosion behavior 316L and DIN 1.4970 austenitic stainless steels in contact with oxygen-poor (CO < 10−8 mass%), static liquid lead‑bismuth eutectic (LBE) at 500 °C for 600–1000 h. The objective this study was to determine relative early-stage resistance uncoated assess protectiveness select candidate coatings (Cr2AlC, Al2O3, V2AlxC...