Article
Materials Science, Multidisciplinary
Le Chen, Bing Zhang, Yan Yang, Tianli Zhao, Yi Xu, Qi Wang, Bin Zan, Jun Cai, Kuaishe Wang, Xi Chen
Summary: Nickel-based superalloy has excellent mechanical properties at high temperature, but the high deformation resistance, narrow deformation temperature range, and complex microstructure evolution of the alloy pose great challenges to its plastic deformation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Xiao-Min Chen, Meng -Tao Ning, Hong-Wei Hu, Yong-Cheng Lin, Xiao-Jie Zhou, Jian Zhang, Xian-Zheng Lu, Jian Chen, Yan-Xing Liu
Summary: The hot compressive behavior of GH4698 superalloy was studied in the temperature range of 950-1100 degrees C and strain rate range of 0.001-1 s-1. The results showed work hardening and dynamic recovery features at the beginning of deformation, followed by dynamic softening induced by dynamic recrystallization (DRX). An improved Zhu-Ou-Popov (ZOP) model was proposed to characterize the hot deformation behavior of the superalloy, which showed a high correlation coefficient of 0.9721. Processing maps were established based on the dynamic material model, and the microstructural evolution validated the feasibility of the maps. The maps revealed different regions with unstable, stable with low power dissipation, and stable with high power dissipation behavior, providing guidance for achieving desired performance in hot working.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Yong Guan, Yongchang Liu, Zongqing Ma, Huijun Li, Hongyao Yu
Summary: The hot deformation behavior and microstructure evolution of as-cast CoNi-based superalloy were investigated through hot compression tests, revealing a peak efficiency of 0.38 on the processing map at 1130 degrees C and a strain rate of 0.01 s(-1). The dominant recrystallization mechanism during hot working was found to be discontinuous dynamic recrystallization (DDRX) related to strain-induced grain boundary migration (SIBM), with additional recrystallization occurring through sub-grains around MC carbides and shear band formations. The presence of fine gamma ' precipitates was also noted to inhibit recrystallization.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Rong Kong, Bao Meng, Xin Ma, Youchun Li, Lihuang Zheng, Yu Zhu, Min Wan
Summary: The hot deformation behavior and microstructural evolution of Inconel 625 superalloy sheet under different conditions were investigated. The plastic flow behavior of the Inconel 625 sheet changes from work hardening to hot softening with the rise of experimental temperature and the decline of strain rate. The optimal hot working window appears at the temperature range of 925 and 950 degrees C and the strain rate between 0.001 and 0.1 s-1 with the power dissipation efficiency of about 46.5%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Rui Ma, Lulu Li, Ruixue Zhai, Xiangnan Meng, Jun Zhao
Summary: During the forging process of GH901 superalloys, cracks and defects are easily produced, affecting the alloy's performance. High-temperature compression tests were conducted at different deformation temperatures and strain rates, leading to the establishment of flow stress constitutive models and processing maps for the alloy. The isothermal forging simulation validated the reliability of the thermal processing range.
Article
Materials Science, Multidisciplinary
Zonghong Qu, Pingxiang Zhang, Shujin Liang, Yunjin Lai, Jun Wang, Jiaming Song
Summary: The hot deformation behavior of powder metallurgy superalloy EP741NP was studied, and constitutive equations and processing maps were constructed based on experimental stress-strain data. The dissolved gamma ' had a more significant effect on the processing map than strain rate and strain, and the optimal processing conditions were determined to be at temperatures of 1150-1170 degrees C and strain rates of 0.005-0.02 s(-1).
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Chemistry, Physical
Yulong Zhu, Yu Cao, Qubo He, Jieke Zhang, Rui Luo, Hongshuang Di, Guangjie Huang, Qing Liu
Summary: This study investigated the hot deformation behavior of Alloy 925 through isothermal hot compression tests in different temperature and strain rate ranges. The stress distribution in three-dimensional space was reconstructed using an artificial neural network model. 3D distribution maps of strain rate sensitivity and power dissipation efficiency were proposed, and a novel 3D processing map was established. Microstructural characterization revealed differences between stable and unstable regions, and the optimal processing parameters were determined.
Article
Materials Science, Multidisciplinary
Wei Liu, Hua Zhang, Zhiling Liu, Jingjing Ruan, Hailiang Huang, Xin Zhou, Lilong Zhu, Shangzhou Zhang, Liang Jiang
Summary: This study investigates the hot-working characteristics, microstructure evolution, and dynamic recrystallization of the hot isostatically pressed (HIPed) FGH4096 superalloy at various temperatures and strain rates. A new constitutive equation is developed to accurately predict flow stresses under different deformation conditions. Hot working maps are established to optimize the hot working parameters. Different recrystallization behaviors are observed in different regions, with deformation temperature having a greater influence than strain rate on dynamic recrystallization. Adiabatic shear bands, voids, and cracks along grain boundaries contribute to flow instability in the instability regions. An optimized hot working window is determined based on the hot working map and microstructure evolution.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Yongdi Wang, Pengfei Gao, Hongwei Li, Mei Zhan, Shuai Wang
Summary: The deformation characteristics of GH3128 alloy were investigated and a modified JC-ZA constitutive model was proposed to predict the stress-strain curves. A hot processing map for the alloy was also developed. These findings provide valuable theoretical references for the processing design of GH3128 alloy components.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Yeqing Cai, Song Xiang, Yuanbiao Tan
Summary: The dynamic recrystallization behavior of MP159 superalloy was studied through hot compression tests, identifying the optimal hot processing region and investigating the influence of processing parameters on microstructure evolution. Deformation twins formed during hot deformation can accelerate dynamic recrystallization.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Yanjiang Wang, Zhi Jia, Jinjin Ji, Sidan Li, Dexue Liu
Summary: This study comprehensively investigated the nucleation mechanism of deformation twin (DT) and annealing twin (AT), and their effects on recrystallization in Nickel-based superalloys during dynamic recrystallization (DRX). The results showed that DTs were nucleated by the rotation and decomposition of dislocations, hindering the movement of dislocations in deformed grains and promoting the nucleation of DRX grains. ATs formed at recrystallized grain boundaries and had different effects on continuous and discontinuous DRX. The comprehensive effect of DTs and ATs promoted DRX nucleation, with varying effects depending on the nucleation mechanism.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Jie Xiong, Jian-Chao He, Xue-Song Leng, Tong-Yi Zhang
Summary: The hot deformation behaviors of FGH98 nickel-based powder superalloy were investigated experimentally and theoretically. Hot compression tests were performed on the FGH98 superalloy at various temperature and strain rate conditions. The peak stresses under different deformation conditions were analyzed using the Sellars model and a Gaussian process regression (GPR) model based on machine learning. The GPR model showed better prediction performance than the Sellars model. Additionally, the stress-strain responses were predicted and validated using the GPR model and experimental data. The developed GPR model demonstrated high predictive capability for the hot deformation behaviors of FGH98 superalloy, with an R2 value above 0.99 on the test dataset.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Xingyu Pan, Chonglin Jia, Chunlei Qiu
Summary: The demand for increased aircraft engine efficiency necessitates the development of high-performance heavily-alloyed nickel-based superalloys. This study introduces hot extrusion as a transitional process between casting and forging to process a newly developed and highly alloyed nickel-based superalloy, GH4151. The results demonstrate that hot extrusion facilitates successful processing of GH4151 ingots during subsequent forging, resulting in improved stress rupture properties. Additionally, the study reveals a continuous decrease in stress rupture lifetime with increasing temperature and stress level, alongside an increase in elongation with temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Haizhu Li, Xingang Liu, Wenwen Zhang, Pengwei Liu, Shuling Guo, Heyong Qin, Qiang Tian
Summary: The microstructure evolution of GH4698 nickel-based superalloy was studied under different temperature, strain rate, and strain conditions. The study revealed the effects of temperature and strain rate on dynamic recrystallization, and identified three different mechanisms involved in the process.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Yunlong Hu, Yunlong Li, Wei Fan, Xuehao Gao, Qiang Zhang, Qiwei Wang, Wei Li, Xin Lin, Weidong Huang
Summary: This study investigates the plastic behaviors and dynamic recrystallization mechanisms of as-deposited nickel-based superalloy. The results show that as-deposited Inconel 625 has lower hot deformation activation energy compared to wrought Inconel 625. The study also identifies the best hot working conditions for as-deposited Inconel 625 through microstructural evolution and hot processing map analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Saeed Aliakbari Sani, Ali Khorram, Abed Jaffari, Golamreza Ebrahimi
Summary: This study aimed to develop processing maps based on two models and compare them with conventional processing maps. The hyperbolic sinus constitutive equation and artificial neural network (ANN) approaches were used to predict flow stress and develop processing maps for InX-750 superalloy. The results indicated that the ANN approach is a suitable method for predicting flow stress and hot working processing map of engineering metals and materials.
Article
Nanoscience & Nanotechnology
G. R. Ebrahimi, A. Momeni, H. R. Ezatpour, M. Jahazi, P. Bocher
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Nanoscience & Nanotechnology
M. Torabi Parizi, G. R. Ebrahimi, H. R. Ezatpour
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Materials Science, Multidisciplinary
Saeed Aliakbari Sani, Hossein Arabi, Shahram Kheirandish, Golamreza Ebrahimi
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
M. Kaviani, G. R. Ebrahimi, H. R. Ezatpour, M. Ahmadnia
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Multidisciplinary
M. Kaviani, G. R. Ebrahimi, H. R. Ezatpour
MATERIALS CHEMISTRY AND PHYSICS
(2019)
Article
Nanoscience & Nanotechnology
S. Ramezanzade, G. R. Ebrahimi, M. Torabi Parizi, H. R. Ezatpour
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Materials Science, Composites
S. Ramezanzade, G. R. Ebrahimi, M. Torabi Parizi, H. R. Ezatpour
JOURNAL OF COMPOSITE MATERIALS
(2020)
Article
Nanoscience & Nanotechnology
Saeed Aliakbari Sani, Hossein Arabi, Gholam Reza Ebrahimi
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Chemistry, Physical
M. Torabi Parizi, G. R. Ebrahimi, H. R. Ezatpour, M. Paidar
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Engineering, Manufacturing
G. R. Ebrahimi, A. Barghamadi, H. R. Ezatpour, A. Amiri
JOURNAL OF MANUFACTURING PROCESSES
(2019)
Article
Engineering, Manufacturing
M. Chegini, M. R. Aboutalebi, S. H. Seyedein, G. R. Ebrahimi, M. Jahazi
JOURNAL OF MANUFACTURING PROCESSES
(2020)
Article
Materials Science, Multidisciplinary
Masoud Mirzaee, Ali Reza Khodabandeh, Gholamreza Ebrahimi
Summary: The study revealed that Nimonic 80A alloy exhibits different dynamic recrystallization characteristics at different temperatures and strain rates, with precipitation having an influence on the recrystallization process.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Engineering, Multidisciplinary
B. Barooghi, M. Sheikhi, A. Amiri
Proceedings Paper
Engineering, Manufacturing
B. -A. Behrens, A. Amiri, D. Duran, S. Nothdurft, J. Hermsdorf, S. Kaierle, H. Ohrdes, J. Wallaschek, T. Hassel
PROCEEDINGS OF THE 22ND INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING (ESAFORM 2019)
(2019)
