Article
Materials Science, Multidisciplinary
Wanli Yang, Bin Shao, Pengwen Zhou, Shuhan Zhang, Yingying Zong
Summary: Cr4Mo4Ni4V steel has excellent fracture toughness and fatigue life, making it one of the main materials for the new generation of aeroengine bearing rings. However, there has been a lack of research on the hot processing of Cr4Mo4Ni4V steel. In this study, a hot processing map is established based on compression tests, and an improved map is developed considering the carbide content. The results show that the ideal processing domain is 950-1050℃, 0.01-0.3 s(-1).
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Metallurgy & Metallurgical Engineering
Yinghua Wei, Xingfu Yu, Xiangyang Shen, Dongyue Zheng, Wenzeng Zhao, Yanbin Li, Guobin Yan, Yong Su, Fei Xing
Summary: The effect of cold treatment temperature on the size stability and mechanical properties of M50 bearing steel is studied. It was found that the number of secondary carbides and transformed residual austenite reached the maximum at -70 degrees C. Carbide precipitation reduced the size of the steel, while martensitic transformation led to size increase.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Kyu-Sik Kim, Dong-Yeol Wi, Jae-Seung Lee, Kee-Ahn Lee
Summary: The effect of stored energy on the cementite spheroidization rate of medium carbon cold-heading-quality steel was investigated. By controlling the microstructural characteristics of the steel, faster spheroidization times were achieved by tuning the initial microstructures with their large amounts of stored energy.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Guanghua Zhou, Wenting Wei, Qinglong Liu
Summary: The study found that hot rolling has a positive impact on the microstructural transformation of G20CrNi2MoA bearing steel, improving wear resistance through grain refinement and increased carbon concentration.
Article
Materials Science, Multidisciplinary
H. Y. Wu, D. X. Han, Y. Du, X. H. Gao, L. X. Du
Summary: This study investigates the effects of different initial spheroidizing microstructures on the microstructure and mechanical properties of GCr15 bearing steel. The degree of spheroidization greatly influences the size and distribution of undissolved carbides in the quenching and tempering microstructure. The on-line low-temperature spheroidizing annealing process improves the hardness, wear resistance, and contact fatigue properties of the samples, while reducing the wear rate. Additionally, the contact fatigue life is significantly increased.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Zeju Weng, Kaixuan Gu, Jianpeng Zheng, Chen Cui, Mingli Zhang, Junjie Wang
Summary: In this study, the cryogenically martensitic transformation and its effects on the tempering behaviors of bearing steel were investigated. The results showed that the athermally martensitic transformation of samples experienced three different stages and the transformation rate decreased with the increase of cooling rate. The content of retained austenite transformed isothermally was much smaller and the amount of isothermally formed martensite did not show a linear relationship with the temperature. In addition, DCT improved the tempered hardness of samples and decreased the content of retained austenite. The DCT also affected the decomposition of retained austenite during tempering by lowering the activation energy of decomposition. The microstructure observation showed that the new formed martensite was dominated by ultra-fine twins and the transformation strain induced by DCT caused more dislocations in the microstructure.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Jinxu Liu, Leilei Li, Shantou Yang, Chao Ding, Enmao Wang, Xinpan Yu, Huibin Wu, Gang Niu
Summary: This study investigates the hot deformation mechanism and dynamic recrystallization (DRX) mechanism of Fe-28Mn-11Al-1.5C-5Cr lightweight steel through hot compression tests. The effects of various precipitates on the migration of grain boundaries and the nucleation of DRX grains are observed. The results show that different precipitates have different impacts on the deformation mechanism and the formation of DRX grains.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yongcheng Li, Siyu Chen, Fuhai Zhu, Chenglin Huang, Zhenqiang Zhang, Weidong Xuan, Jiang Wang, Zhongming Ren
Summary: The effects of a 5 T high magnetic field (HMF) on the microstructures and mechanical properties of GCr15 bearing steel after high-temperature tempering were investigated. It was found that the HMF slowed down the growth of the tempered sorbite structures, increased carbide density and reduced carbide size. The reduction in nucleation barrier, increase in dislocation density, and decrease in diffusivity were identified as the possible reasons for these changes. This study provides a new heat treatment method to regulate the microstructure and properties of GCr15 bearing steel.
Article
Engineering, Mechanical
Liqi Yang, Weihai Xue, Siyang Gao, Hongwei Liu, Yanfei Cao, Deli Duan, Dianzhong Li, Shu Li
Summary: The addition of rare earth has an influence on the friction and wear behavior of M50 bearing steel, reducing wear volume. This is mainly attributed to the modification of carbides shape and size by rare earth elements, leading to the formation of smaller wear debris and subsequently reducing wear.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Tian Ye, Feng Zhao, Lianyang Chen, Kun Jiang, Qiong Deng, Yuzeng Chen, Qingyuan Wang, Tao Suo
Summary: TWIP steel shows high strain hardening capability and strength under extreme conditions, but significant ductility loss due to twin structure and its evolution, strain rate, and temperature. The interactions between twin systems and nanotwin structures accelerate crack nucleation and propagation along twin boundaries.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Daniela Nachazelova, Jaromir Dlouhy, Petr Motycka, Jakub Kotous
Summary: This study investigated the dissolution of carbides using dilatometer analysis, comparing the austenitization process of 100CrMnSi6-4 bearing steel in two different initial states: accelerated spheroidization annealing and conventional soft annealing. The main objective was to determine the amount of undissolved cementite during austenitization in the temperature range where only austenite and cementite are present in the structure. Cementite dissolution was quantified using dilatometric curves and image analysis.
Article
Nanoscience & Nanotechnology
P. Ren, X. P. Chen, M. J. Yang, S. M. Liu, W. Q. Cao
Summary: High Mn-Al-C austenitic low-density steels possess excellent combination of strength and ductility due to their great strain hardening capability. In this study, it is found that the early precipitation of kappa-carbides slows down the evolution of microstructure and deteriorates the work hardening capability, while increasing the cooling rate significantly improves the ultimate tensile strength of the alloy without decreasing the yield strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Zhen Cai, Xiaolong Gan, Yanqi Li, Sheng Liu, Siqian Bao, Guang Xu
Summary: The effects of strain on the microstructure and mechanical properties of high-carbon steel were studied. It was found that strain influenced the pearlite transformation and cementite spheroidization, and increasing strain resulted in decreased strength but increased elongation of the steel.
Article
Materials Science, Multidisciplinary
Mohammad Masoumi, M. A. Mohtadi-Bonab, Jorge L. Cardoso, Ladislav Novotny, Rodrigo CP. Loureiro, Pedro H. Pinheiro, Miloslav Beres, Hamilton FG. de Abreu
Summary: This study investigated the effects of thermomechanical heat treatments on commercial AISI 1070 steel, analyzing the microstructure, crystallographic texture, and mechanical properties. The results showed the importance of controlling the heat treatment process to achieve desired microstructures and mechanical properties in steels, providing insights into their relationship.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Metallurgy & Metallurgical Engineering
Yongcheng Li, Chuanjun Li, Siyu Chen, Fuhai Zhu, Weidong Xuan, Jiang Wang, Zhongming Ren
Summary: The application of an alternating magnetic field (AMF) during the austenitizing stage of GCr15 bearing steel can promote the dissolution of carbides and accelerate the austenitizing process. It also affects the microstructures and mechanical properties of the steel. The presence of an AMF leads to a more uniform and finer distribution of carbides, but results in lower hardness compared to samples without an AMF.
ISIJ INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
G. -S. Sun, J. Hu, B. Zhang, L. -X. Du
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2018)
Article
Metallurgy & Metallurgical Engineering
Jun Hu, Lin-xiu Du, Bin Zhang, Xiang-yu Qi, Xiu-hua Gao, R. D. K. Misra
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2018)
Article
Nanoscience & Nanotechnology
Guosheng Sun, Linxiu Du, Jun Hu, Bin Zhang, R. D. K. Misra
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Materials Science, Multidisciplinary
Yue Liu, Lin-Xiu Du, Bin Zhang, Hong-Yan Wu, R. D. K. Misra
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2019)
Article
Materials Science, Multidisciplinary
Guosheng Sun, Linxiu Du, Jun Hu, Bin Zhang
MATERIALS CHARACTERIZATION
(2020)
Article
Nanoscience & Nanotechnology
B. Zhang, L. X. Du, Y. Dong, D. X. Han, H. Y. Wu, F. H. Lu, R. D. K. Misra
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Metallurgy & Metallurgical Engineering
Bin Zhang, Ying Dong, Raja Devesh Kumar Misra, Yue Liu, Chao Sun, Lin Xiu Du
Summary: The study shows that the flow stress of the novel TRIP alloy increases with decreasing deformation temperature and increasing strain rate, with optimum hot deformation conditions identified at 1273 K and 0.8 s(-1). Transmission electron microscope (TEM) observations reveal the presence of two dynamic recrystallization mechanisms - CDRX and SIBM.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Ying Dong, Bin Zhang, Yu Du, Lin-Xiu Du, Raja Devesh Kumar Misra
Summary: This study investigates the constitutive analysis and microstructural characteristics of Ti microalloyed medium-Mn steel through hot deformation tests. It reveals that the fluctuation of flow stress during hot deformation is influenced by deformation conditions and that an increase in Ti content accelerates the progress in the dynamic recrystallization process, resulting in refined martensite lath in high Ti content steel.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
B. Zhang, M. M. Zhao, Y. Dong, R. D. K. Misra, Y. Du, H. Y. Wu, L. X. Du
Summary: The study investigates the structure-property relationship in a novel 1000 MPa hot-rolled TRIP steel processed by TMCP and coiling process tuning. Experimental techniques such as electron microscopy, EBSD, TEM, and nanoindentation were combined to understand the relationship. Ultrafine ferrite and enriched carbon in untransformed austenite led to higher retained austenite content and a strong TRIP effect, resulting in a good combination of strength and plasticity in the experimental steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Optics
B. Zhang, Y. Dong, Y. Du, R. D. K. Misra, H. Y. Wu, X. N. Wang, W. Z. Zhao, L. X. Du
Summary: The laser welding of 1.2 GPa hot-rolled TRIP steels with a thickness of 1.9 mm resulted in defect-free joints with complete penetration. The fusion zone consisting of high microhardness martensite, achieved a joint efficiency of 96.6%, but exhibited limitations in formability. The deformation behavior depended on the weld position, with the martensite in the fusion zone effectively restraining transverse deformation.
OPTICS AND LASER TECHNOLOGY
(2021)