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Dynamic recrystallization behavior of a typical nickel based superalloy during hot deformation
一种典型的镍基高温合金热变形中的动态再结晶行为
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Abstract
①Based on the conventional DRX ics model, the volume fractions of DRX are firstly estimated.
②Results show that there is an obvious deviation between the experimental and pre-dicted volume fractions of DRX when the forming temperature is below 980 ℃. Therefore, the segmented models are proposed to describe the ics of DRX for the studied superalloy.
分段建立动态再结晶百分数方程
首次建立镍基高温合金动态再结晶百分数方程
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Abstract
③Comparisons between the experimental and predicted results indicate that the proposed segmented models can give an accurate and precise estimation of the volume fractions of DRX for the studied superalloy.
④In addition, the optical observation of the deformed microstructure confirms that the dynamically recrystallized grain size can be well characterized by a power function of Zener–Hollumon parameter
建立的再结晶方程与实验结果具有一致性
动态再结晶晶粒尺寸可以用Z参数方程表示
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Introduction
Over the last decades, some efforts have been made on the DRX behaviors of various metals or alloys [15–42]. In order to control the microstructure and mechanical properties, it is essential to quantify the volume fractions of DRX. The Avrami equation [15]is often used to evaluate the softening fractions induced by static recrystallization (SRX), meta-dynamic recrystallization (MDRX) and dynamic recrystallization (DRX). Chen et al. [16] and Quan…Momeni and Dehghani [18] developed… Mandal et al. [19,20] investigated… Ebrahimi et al. [22] studied... Yin al.[23]investigated... Zeng et al.[27] studied the hot deformation...
首先介绍,过去的几十年不同学者研究了各种金属的动态再结晶行为,Avrami方程常被用作评估再结晶的软化机制。其中参考文献[16][18]研究了42CrMo钢的动态再结晶行为以及再结晶方程[19][20]探索了奥氏体不锈钢的再结晶组织演化机制、原理以及动力学。[23]通过物理核验和有限元探索了GCr15钢微观组织演化,用公式表达了奥氏体晶粒长大和动态再结晶。[27]建立了钛铝合金动态再结晶百分数的Avrami方程预测动态再结晶百分数
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Introduction
Due to the different precipitation phases, together with their changeable shapes and distributions, the hot