Article
Chemistry, Physical
Shulin Dong, Yingdong Qu, Ruirun Chen, Guanglong Li, Wei Zhang, Qi Wang, Hongze Fang, Jingjie Guo, Bo Yu
Summary: By designing and preparing Ti-44Al-4Nb-0.5Fe-0.1B and Ti-44Al-2Nb-2Fe-0.1B alloys, the study focuses on whether and why the hot deformation processing capability of the new alloys is improved. The results show that the Ti-44Al-2Nb-2Fe-0.1B alloy has lower true stress, moderate diffusion activation energy, lower stress exponent, larger hot processing window, lower dislocation density, and more adequate dynamic recrystallization, demonstrating its good hot deformation processing capability and service properties.
Article
Nanoscience & Nanotechnology
Andrew Peterson, Ian Baker
Summary: The deformation mechanisms of an alumina-forming austenitic stainless-steel Fe-20Cr-30Ni-2Nb-5Al were investigated at 750°C, showing that nano-sized L12structured precipitates provided the majority of the strengthening and grain boundary precipitates acted as barriers to dislocation movement, ultimately leading to failure along the grain boundaries in all tests.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Debasis Poddar, Pavel Cizek, Hossein Beladi, Peter D. Hodgson
Summary: The study investigates the impact of double-pass deformation and annealing on NbC precipitates during hot deformation of a Fe-30Ni-Nb microalloyed model steel. The relocation of precipitates at the second pass shifts the precipitation process back to nucleation and growth stage, while extended holding after two-pass deformation leads to widespread dislocation annihilation. This significantly hinders precipitation growth and coarsening processes.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Ting Zhao, Shengwei Rong, Xiaohong Hao, Yuefeng Wang, Chen Chen, Tiansheng Wang
Summary: In this study, the flow behavior and microstructure of Fe-Mn-Al-C austenitic steel and Nb-V microalloyed Fe-Mn-Al-C austenitic steel during uniaxial hot compression deformation were systematically investigated. The addition of Nb-V was found to significantly enhance the flow softening phenomenon of the steel at low temperatures and low strain rates, while having a marginal effect on the hot deformation activation energy. The uniformly distributed nano-sized (Nb,V)C particles in Nb-V microalloyed steel acted as nucleation sites for dynamic recrystallization, promoting the process and enhancing the hot deformation stability of the steel.
MATERIALS CHARACTERIZATION
(2022)
Article
Engineering, Manufacturing
Matruprasad Rout, Shiv Brat Singh, Surjya K. Pal
Summary: The study focused on the texture evolution of 304LN austenitic stainless steel after the hot-deformation process, with specific interest in different temperature and holding time effects on fiber structures. At higher temperatures and longer holding times, the texture became random. Goss component was identified as a major texture component with significant ND and RD rotated cube components.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2021)
Article
Materials Science, Multidisciplinary
Qibin Wang, Qi Wang, Ruirun Chen, Xiaowei Wang, Yanqing Su, Hengzhi Fu
Summary: By synergistically adding Zr and Fe, the properties of Nb-24Ti-16Si-2Al alloy are optimized, suppressing the formation of (Nb, X)3Si phase and altering the constituent phases. The addition of Zr enhances the proportion of gamma-(Nb, X)5Si-3 and refines the eutectic colonies. Fe mainly controls the formation and proportion of Nb4FeSi phase. The formation of hexagonal gamma-(Nb, X)5Si-3 blocks improves room temperature toughness and compressive strength.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Shizhou Wang, Chengbin Shi, Huai Zhang, Li Meng, Jing Li
Summary: The flow behavior, dynamic recrystallization, and microstructure evolution of a newly developed valve alloy were studied. Models were established to predict the flow behavior and DRX behavior, and the optimal processing parameters were determined. The Laves phase and (Ti,Nb)C particles hindered the dynamic recrystallization process, while fine gamma' particles provided nucleation sites for recrystallization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Nanoscience & Nanotechnology
Changsheng Li, Jingbo Dong, Kun Li, Xingyang Tu, Yanlei Song
Summary: The micro-textures and mechanical properties of the Fe-21Cr-15Ni-6Mn-Mo-Nb austenitic stainless steel during asymmetric hot rolling were studied. The results showed that the shear texture was dominant on the upper surface of the steel sheet when the specific velocity ratio was 1.1. As the velocity ratio increased to 1.2, complete recrystallization of the upper and central layers of the plate was more likely to occur, leading to a homogenized structure.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Qibin Wang, Qi Wang, Ruirun Chen, Xiaowei Wang, Yanqing Su, Hengzhi Fu
Summary: The synergistic effects of Fe and V on microstructural evolution and properties of Nb-24Ti-16Si-2Al alloys are investigated in order to improve the thermal deformation ability of Nb-Si alloy and increase the fracture toughness. The addition of Fe and V suppresses the formation of (Nb, X)3Si and introduces a new silicide Nb4FeSi. Fe is primarily enriched in Nb4FeSi phase, while V is mainly dissolved in Nbss and Nb4FeSi phases. The co-addition of Fe and V significantly enhances the room temperature fracture toughness, and the hot deformation behavior exhibits excellent ability close to the melting point of Nb4FeSi. The composition homogenization and refinement of the coarse silicides are achieved after hot deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Rui Luo, Leli Chen, Yuanxiang Zhang, Yu Cao, Ching-Tun Peng, Yuyan Yang, Tian Liu, Qi Zheng, Xiaonong Cheng
Summary: The thermal-mechanical experiments on a newly developed Fe-Cr-Ni-Al-Nb superalloy revealed that higher temperature, lower strain rate, and larger true strain were favorable for dynamic recrystallization. The study also identified three stages during dynamic recrystallization and three different mechanisms for the process.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Tingting Song, Xin Li, Xu Tang, Wenzong Yin, Yang Luo, Dunbo Yu, Wenlong Yan, Jinyun Ju, Renjie Chen, Aru Yan
Summary: Nb element was introduced to regulate the microstructure of melt-spun powder and die-upset magnets, effectively restricting grain growth in coarse grain regions. The addition of Nb significantly improved the magnetic properties and thermal stability of the magnets, forming an anisotropic magnet.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Xin Hu, Chen Chen, Yanguo Li, Zhinan Yang, Fucheng Zhang, Wei Zhang
Summary: This study systematically investigated the microstructure evolution of 7Mo-0.42N contained cast super austenitic stainless steel (SASS) during compression deformation at high temperature. The recrystallization behavior of SASS was found to occur in three stages, and various phenomena such as grain refinement, abnormal growth, and dislocation evolution were observed. Additionally, the nucleation mechanism was found to change with different strain variables.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Polymer Science
Alina Vozniak, Zbigniew Bartczak
Summary: The study investigates the plastic deformation ability of PLLA in a wide temperature range, finding that amorphous PLLA can undergo significant deformation in both tension and plane-strain compression, while crystallized PLLA samples are brittle in tension and ductile in plane-strain compression. The deformation mechanisms differ between the two states, with oriented chains and strain-induced crystallization being the main mechanisms in amorphous PLLA, and interlamellar slip supported by crystallographic chain slip in semicrystalline PLLA. In addition, crystallographic slip is notably increased with higher deformation temperatures, and alpha ->beta crystal transformation can occur at temperatures above 115-140 degrees C.
Article
Materials Science, Multidisciplinary
Xin Hu, Zhuyu Wang, Lin Wang, Chen Chen, Fucheng Zhang, Wei Zhang
Summary: The study systematically investigates the hot compression behavior of 7Mo-0.37N-RE super austenitic stainless steel subjected to solution treatment and pre-deformation, revealing that pre-deformation treatment increases dislocation density and influences flow behavior, dynamic softening mechanism, hot workability, and microstructural evolution. Pre-deformation treatment broadens the hot working range of SASS under the same conditions.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Civil
D. S. Svyetlichnyy, J. Majta, R. Kuziak, K. Muszka
Summary: This study presents a computer model based on three-dimensional Frontal Cellular Automata to simulate ultrafine-grained microstructure development in purpose-designed microalloyed austenite model alloy. The model successfully predicts characteristics of FCC microstructures and shows satisfactory agreement between experimental studies and simulations, as well as industrial verification of the developed model.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Nima Haghdadi, Majid Laleh, Ali Kosari, M. H. Moayed, Pavel Cizek, Peter D. Hodgson, Hossein Beladi
Article
Materials Science, Multidisciplinary
Farahnaz Haftlang, Abbas Zarei-Hanzaki, Hamid Reza Abedi, Joraslov Malek, Ehsan Farabi, Hossein Beladi
METALS AND MATERIALS INTERNATIONAL
(2020)
Article
Materials Science, Multidisciplinary
Paul C. Okonkwo, Furqan Ahmad, Beladi Hossein
Article
Materials Science, Multidisciplinary
H. Kong, Q. Chao, B. Rolfe, H. Beladi
MATERIALS & DESIGN
(2019)
Article
Materials Science, Multidisciplinary
Hossein Beladi, Alireza Ghaderi, Gregory S. Rohrer
PHILOSOPHICAL MAGAZINE
(2020)
Article
Materials Science, Multidisciplinary
N. Haghdadi, P. Cizek, P. D. Hodgson, Y. He, B. Sun, J. J. Jonas, G. S. Rohrer, H. Beladi
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Metallurgy & Metallurgical Engineering
Pawan Kumar, Peter Hodgson, Hossein Beladi, Mamookho Elizabeth Makhatha, Aniket Kumar Dutt
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2020)
Article
Nanoscience & Nanotechnology
Dong Han, Hua Ding, Degang Liu, Bernard Rolfe, Hossein Beladi
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Materials Science, Multidisciplinary
Ehsan Farabi, Vahid Tari, Peter D. Hodgson, Gregory S. Rohrer, Hossein Beladi
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Multidisciplinary Sciences
Qiuliang Huang, Ran Shi, Ondrej Muransky, Hossein Beladi, Saurabh Kabra, Christian Schimpf, Olena Volkova, Horst Biermann, Javad Mola
SCIENTIFIC REPORTS
(2020)
Correction
Multidisciplinary Sciences
Qiuliang Huang, Ran Shi, Ondrej Muransky, Hossein Beladi, Saurabh Kabra, Christian Schimpf, Olena Volkova, Horst Biermann, Javad Mola
SCIENTIFIC REPORTS
(2020)
Article
Nanoscience & Nanotechnology
Jiangting Wang, Hossein Beladi, Libo Pan, Fang Fang, Jun Hu, Lingxue Kong, Peter D. Hodgson, Ilana Timokhina
Summary: This study successfully used continuous cooling process to achieve interphase precipitation-strengthened ferrite in dual-phase steels, with nano-sized (Ti, Mo) C interphase precipitates forming hardened ferrite phase, providing a new strategy for dual-phase steel production.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Prashant Pathak, Ilana Timokhina, Subrata Mukherjee, Gregory S. Rohrer, Hossein Beladi
Summary: The crystallographic properties of interfaces in dual-phase steel were investigated, showing that the distribution of interfaces was influenced by the dominant phase transformation mechanism, leading to anisotropic grain boundary plane distribution.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Ahmad Mirzaei, Razieh Ghaderi, Peter D. Hodgson, Xiang Ma, Gregory S. Rohrer, Hossein Beladi
Summary: The influence of parent austenite deformation state on lath martensitic microstructure was examined in this study, revealing significant changes in boundary network connectivity and distribution. Manipulating the intervariant boundary network of lath martensite through changes in parent austenite deformation state can enhance key final product properties.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Ehsan Farabi, Vahid Tari, Peter D. Hodgson, Gregory S. Rohrer, Hossein Beladi
MATERIALS CHARACTERIZATION
(2020)