Numerical simulation and experimental verification of microstructure evolution in large forged pipe used for AP1000 nuclear power plants

Wang, Shenglong; Yang, Bin; Zhang, Mingxian; Wu, Huanchun; Peng, Jintao; Gao, Yang

doi:10.1016/j.anucene.2015.07.042

Cited by 24 publications

(8 citation statements)

References 25 publications

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“…ε is the strain rate; R is the universal gas constant (8.314 J¨mol´1¨˝C´1); T is the temperature; A 1 , A 2 , A 3 , n 1 , n, β, and α («β/n 1 ) are material constants. Equation (2) is a transformation of Equation (1). So the variables can be defined as:…”

Section: Constitutive Analysismentioning

confidence: 99%

“…Stainless steels, and in particular 316LN austenitic stainless steel, have been widely used as the piping material for nuclear power plants (NPPs) due to their high resistance to corrosion and oxidation, whilst retaining high strength and excellent ductility over a wide range of temperatures [1]. As of present, the main methods for manufacturing the pipes for the AP1000 nuclear power plants are the use of forging and extrusion technologies to take advantage of the extraordinarily high ductility of the material.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Recrystallization and Hot Workability of 316LN Stainless Steel

Sun

Xiang

Zhou

et al. 2016

Metals

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Abstract:To identify the optimal deformation parameters for 316LN austenitic stainless steel, it is necessary to study the macroscopic deformation and the microstructural evolution behavior simultaneously in order to ascertain the relationship between the two. Isothermal uniaxial compression tests of 316LN were conducted over the temperature range of 950-1150˝C and for the strain rate range of 0.001-10 s´1 using a Gleeble-1500 thermal-mechanical simulator. The microstructural evolution during deformation processes was investigated by studying the constitutive law and dynamic recrystallization behaviors. Dynamic recrystallization volume fraction was introduced to reveal the power dissipation during the microstructural evolution. Processing maps were developed based on the effects of various temperatures, strain rates, and strains, which suggests that power dissipation efficiency increases gradually with increasing temperature and decreasing stain rate. Optimum regimes for the hot deformation of 316LN stainless steel were revealed on conventional hot processing maps and verified effectively through the examination of the microstructure. In addition, the regimes for defects of the product were also interpreted on the conventional hot processing maps. The developed power dissipation efficiency maps allow optimized processing routes to be selected, thus enabling industry producers to effectively control forming variables to enhance practical production process efficiency.

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Section: Constitutive Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Recrystallization and Hot Workability of 316LN Stainless Steel

Sun

Xiang

Zhou

et al. 2016

Metals

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“…This may make people aware that their information is insufficient in quantity and quality and motivate people to seek additional information to clearly understand the threat (Yue et al, 2011). Most previous studies confirmed threat perception was a driving force for information needs (Prati and Zani, 2013;Wang et al, 2016;Iwona et al, 2019). In the risk situation of COVID-19, people's threat perception generally increases the feeling of fear and anxiety.…”

Section: Information Need and Information Seekingmentioning

confidence: 81%

What drives people’s protective behaviors during the early stage of the COVID-19 pandemic in China

2022

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This study systematically examined people’s protective behaviors against COVID-19 in China, and particular attention was given to people’s perceived threat and information-processing strategies. This study constructed a conceptual model and used structural equation modeling to explore this issue, and a questionnaire survey was conducted to collect data involving 4,605 participants during the early stage of the COVID-19 pandemic in China. The results showed that people’s initial information acquisition played an essential role in their behavioral responses; acquiring more initial information about COVID-19 would make them perceive a higher threat and present a higher demand for information, then making them more likely to seek and process information, and subsequently motivating their protective behaviors. In addition to increasing people’s information needs, the perceived threat could also strengthen the analytical assessment and affect protective behavior positively but failed to predict the experiential assessment. Driven by information need, information seeking significantly influenced protective behavior; it also facilitated analytical assessment and decreased experiential assessment, thus predicting people’s protective behaviors. Protective behaviors were spurred by analytical assessment but negatively influenced by the experiential assessment.

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“…(1) Deform-3D finite element software [32] is utilized to simulate the quenching process of the cutter ring, incorporating coupling calculations encompassing temperature, phase transition, and elastic-plastic modules. To ensure the accuracy of the simulation, the temperature, phase transition, and other workpiece information are imported into the subsequent step after completing the calculation of the previous step, resulting in the creation of a new file for the next computational step [33,34].…”

Section: Simulation and Experiments Processmentioning

confidence: 99%

Numerical Simulation and Experimental Verification of the Quenching Process for Ti Microalloying H13 Steel Used to Shield Machine Cutter Rings

Feng,

Wang,

Han

et al. 2024

Metals

Self Cite

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Owing to the non-uniform distribution of chemical composition and temperature during the heat treatment process, the residual stress and deformation of the workpiece emerge as crucial factors requiring consideration in managing the service performance and lifespan of shield machine cutter rings crafted from H13 steel. Considering H13 steel with titanium microalloying as the research object for the shield machine cutter ring, we simulate the quenching process using Deform-3D. The temperature field, phase transformation, stress evolution, and deformation amount after quenching are analyzed. The results demonstrate a strong agreement between the simulation and experimental results, offering valuable insights for optimizing the heat treatment process and enhancing the overall performance of shield machine cutter rings.

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Numerical simulation and experimental verification of microstructure evolution in large forged pipe used for AP1000 nuclear power plants

Cited by 24 publications

References 25 publications

Dynamic Recrystallization and Hot Workability of 316LN Stainless Steel

Dynamic Recrystallization and Hot Workability of 316LN Stainless Steel

What drives people’s protective behaviors during the early stage of the COVID-19 pandemic in China

Numerical Simulation and Experimental Verification of the Quenching Process for Ti Microalloying H13 Steel Used to Shield Machine Cutter Rings

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