نتایج جستجو برای: static recrystallization kinetics

تعداد نتایج: 208452  

Journal: :IOP conference series 2021

Abstract The migration of recrystallization boundaries into spatially varying deformation energy fields are simulated based on a two-dimensional phase-field model. chosen as idealized versions microstructures subdivided by two sets intersecting geometrically necessary dislocation (GNBs), and effects the sharpness GNBs investigated. simulations show that shape recrystallizing grain well kinetics...

Bahman Mirzakhani, Hossein Arabi, Mohammad Taghi Salehi,Seyed Hossein Seyedein, Mohammad Reza Aboutalebi, Jilt Sietsma, Shahin Khoddam,

  Abstract   Recovery and recrystallization phenomena and effects of microalloying elements on these phenomena are of great importance in designing thermomechanical processes of microalloyed steels. Thus, understanding and modeling of microstructure evolution during hot deformation leads to optimize the processing conditions and to improve the product properties.   In this study, finite element...

2017
Xin Liu Donghui Yu Qunbo Fan Ran Shi

The microstructural evolution and underlying mechanism of a new high strength, high toughness near β titanium alloy, β20C, during hot deformation, and heat treatment were studied qualitatively and quantitatively. It was found that dynamic recovery occurs mainly in β phase, while α phase undergoes both a dynamic recovery and continuous incomplete dynamic recrystallization with a fraction of high...

2016
Rongmei Niu Ke Han Yi-feng Su Tiglet Besara Theo M. Siegrist Xiaowei Zuo

High density grain boundaries provide high strength, but may introduce undesirable features, such as high Fermi levels and instability. We investigated the kinetics of recovery and recrystallization of Cu that was manufactured to include both nanotwins (NT) and high-angle columnar boundaries. We used the isothermal Johnson-Mehl-Avrami-Kolmogorov (JMAK) model to estimate activation energy values...

M. A. Sohrabizadeh M. Sheikhi Y. Mazaheri

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...

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