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
Esther Hutten, Shenglong Liang, Erika Bellhouse, Sujay Sarkar, Yaping Lu, Brian Langelier, Hatem S. Zurob
Summary: The mechanical properties and precipitation behavior of hot-rolled microalloyed steels with varied Nb and V additions were investigated. The steels exhibited a good combination of strength, ductility, and hole expansion ratio, with strength increasing with increasing Nb and V content. The favorable hole expansion behavior was attributed to fine ferrite grain size and uniformity of the microstructure, as well as the formation of fine precipitates of Nb and V carbonitrides.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
M. Rezayat, M. S. Mohebbi, M. H. Parsa, L. Orovcik, M. Nosko
Summary: The study on Nb-Ti low carbon HSLA steel in the petroleum industry reveals that cooling rate and coiling temperature significantly affect final microstructure and texture. Higher cooling rate increases retained austenite content, reduces ferrite grain size, and improves grain size homogeneity. Coiling at different temperatures results in different ferrite textures due to recrystallization and transformation mechanisms.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Metallurgy & Metallurgical Engineering
Mohammad Rezayat, Mohammad Sadegh Mohebbi, Mohammad Habibi Parsa, Stefan Nagy, Martin Nosko
Summary: The microstructural evolution of Nb-Ti microalloyed steel during hot rolling and simulated coiling was studied, revealing that the finish rolling temperature has a significant impact on the final microstructure characteristics, including grain size, grain morphology, and texture. The activation of the deformation-induced ferrite transformation (DIFT) mechanism and the appearance of specific components depend on the finish rolling temperature, affecting the yield strength and strain hardening of the steel.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Fei Li, Li-wen Zhang, Chi Zhang, Kang-jie Song, Pei-gang Mao
Summary: The control of microstructure during the hot rolling process is crucial for the properties of steel products. In this study, a three-dimensional finite element model was established to analyze the microstructure evolution of 38CrMoAl steel during the 24-pass continuous hot rolling process. The simulation results were compared with experimental results, confirming the reliability of the model.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Chen Gu, Colin Scott, Fateh Fazeli, Xiang Wang, Nabil Bassim, Hatem Zurob
Summary: The precipitation in a high-strength low-alloy steel with V and Nb additions during coiling at 500 degrees C was investigated using advanced characterization techniques. Nano precipitates preferentially formed around dislocations and grain/sub-grain boundaries associated with bainite. Precipitates were also observed around cementite and interphase clusters were found associated with ferrite. The co-existence of different kinds of precipitates was revealed, and it was found that the precipitation of microalloy particles near cementite could reduce the precipitation hardening contribution.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Congzhong Wen, Hui Pan, Jinghu Li
Summary: This study investigates the flow characteristics and processability of forged F92 stainless steel through isothermal compression tests. The flow stress curve is analyzed using the Arrhenius constitutive equation. The hot working map is constructed to determine optimal deformation parameters and understand microstructure evolution. Dynamic recrystallization and flow localization are identified as the main deformation mechanisms.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Matruprasad Rout, V. Murugabalaji
Summary: In this study, single-pass hot rolling was conducted on 304LN austenitic stainless steel at different initial sample temperatures. Tensile samples were prepared to investigate the variation in through-thickness tensile properties. The microstructure of the rolled samples was examined using the electron backscattered diffraction (EBSD) technique. Significant differences in ultimate tensile strength (UTS) were observed for the surface of samples rolled at 900 degrees C and 1100 degrees C, while the UTS values along the thickness direction did not differ much for samples rolled at 1000 degrees C. A significant deviation in total elongation was observed for the surface sample. Strain hardening exponent (n), strength coefficient (K), and strain hardening rate (theta) were considered to study the difference in tensile behavior. The through-thickness tensile properties were correlated to the microstructure and texture, which played an important role in the behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
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
Materials Science, Multidisciplinary
Qingjuan Wang, Zeen He, Zhongze Du, Qinren Wang, Xue Dang, Zejiang Qi, Congcong Yang
Summary: Hot compression experiments were conducted on 42CrMo steel to investigate the microstructure evolution and flow behavior under different deformation conditions. The results show that the flow curves exhibit significant peaks at low strain rates and high temperatures, with peak stress increasing at lower deformation temperatures and higher strain rates. The critical points of dynamic recrystallization (DRX) were derived from the work-hardening curves, and the relationship between peak and critical strains was determined. The softening mechanism was found to be a combination of dynamic recovery (DRV) and DRX at low temperatures, while mainly DRX at high temperatures, with coarsening of the deformed DRX grains at low strain rates.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Anjin Liu, Lin Wang, Xingwang Cheng, Zixuan Ning, Lei Pan
Summary: The hot deformation behavior and microstructure evolution of newly developed as-cast high-density steel were investigated. The steel exhibited higher activation energy and an increase in the degree of dynamic recrystallization with increasing temperature and decreasing strain rate.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Xiaoyun Sun, Banglun Wang, Yuanpei Duan, Qi Liu, Xiang Xu, Sheng Wang, Xianfeng Yang, Xue Feng
Summary: The dynamic recrystallization behavior and microstructure evolution of medium-Mn steel were investigated through isothermal hot compression tests. Constitutive equations and a grain size evolution model were established based on flow stress-strain curves and microstructure analysis. The accuracy of the model was confirmed with high predictive ability and low average absolute relative error.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Zhenglong Liang, Wentao Li, Bingguo Zhu, Liqun Niu
Summary: The flow stress and dynamic recrystallization behavior of A356 aluminum alloy were investigated under different strain rates and temperatures. It was found that dynamic recrystallization occurred during the isothermal compression. A physical dynamic recrystallization model based on the Arrhenius equation was proposed and successfully used to predict the dynamic recrystallization fraction of A356 aluminum alloy during the isothermal compression. The model was also implemented in FEM software Forge, and the microstructure evolution was well simulated.
Article
Engineering, Industrial
Yuanming Liu, Yaxin Li, Zhenhua Wang, Yanxiao Liu, Tao Wang, Qingxue Huang, Tianxiang Wang
Summary: The advantages of stainless steel/carbon steel clad plates include corrosion resistance, low cost, good ductility, etc., which are usually used as chief load-bearing components. However, the low bonding strength and bearing capacity of clad plates severely limit their wide application. This study investigates the deformation characteristic, mechanical property, and microstructure evolution of 316 L/Q235B/316 L clad plates prepared by the longitudinal corrugated rolling (LCR) method. The effects of LCR and traditional flat rolling (FR) processes on the performance of clad plates are compared and analyzed. The results show that the LCR process can significantly improve the shear strength, tensile strength, and bending strength of the clad plates, as well as change the grain state and metal flow.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Michal Sauer, Richard Fabik, Ivo Schindler, Petr Kawulok, Petr Opela, Rostislav Kawulok, Vlastimil Vodarek, Stanislav Rusz
Summary: It is preferable to use reliable models of microstructure evolution to optimize the roll pass design of profile rolling mills. A modified microstructure evolution model was presented based on mathematical equations, which better accounts for the influence of strain-induced precipitation on the kinetics of static recrystallization. The modified model was verified using a plain strain compression test simulation of rolling a 100-mm-diameter round bar.
