Review
Materials Science, Multidisciplinary
Jialong Tian, Zhouhua Jiang
Summary: The research investigates the potential of ultrahigh-strength (UHS) steels in lightweight engineering and performance upgrade, discussing the importance of optimizing composition design and processes. This review systematically summarizes UHS steels strengthened by carbides and intermetallics, comparing their strength and toughness losses. In-depth mechanisms and future prospects of developing advanced UHS steels strengthened by coexisting dispersive precipitates are also discussed.
FRONTIERS IN MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Jiayun Zhang, Yunbo Xu, Dingting Han, Zelin Tong
Summary: This study proposes a novel concept of microstructure design involving warm rolling and low-temperature annealing to greatly enhance the strength-ductility combination of medium Mn steel. The results show that the unique transformation induced plasticity triggered by microbands and deformation twins significantly improve the ductility, while maintaining a reasonable dislocation density in non-recrystallized austenite grains that greatly increases the yield strength. Constitutive models are used to discuss the individual contributions of solid solution strengthening, grain boundary strengthening, V-precipitates strengthening, and dislocation strengthening to yield strength, with tangled dislocations playing a dominant role. The best strength-ductility combination is achieved, with comparable or superior yield strength, ultimate tensile strength, total elongation, and product of strength and elongation to reported medium-Mn steels.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
R. D. K. Misra
Summary: The presented perspective emphasizes the roles of grain size, grain boundary chemistry, and substructural features in determining the fracture toughness of high strength iron-based metallic materials. Experimental metal processing technology is reviewed to analyze the relationship between toughness and microstructural features.
MATERIALS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Mohammad Masoumi, Gustavo Tressia, Dany Michell Andrade Centeno, Helio Goldenstein
Summary: The study investigated the possibility of improving the mechanical and wear performance of steel rails through a two-step heat treatment method, which eliminated the remaining austenite and obtained a refined bainite-ferrite microstructure. This treatment significantly increased mechanical properties and wear resistance of the rails.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Jairo Alberto Munoz, Tarek Khelfa, Alexander Komissarov, Jose-Maria Cabrera
Summary: ECAP processing leads to grain size reduction and strength increase; grain sizes range from 0.9µm to 0.36µm; the low ductility of UFG material may be associated with a high annihilation rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Jun Hu, XuYang Li, QingWang Meng, LingYu Wang, YiZhuang Li, Wei Xu
Summary: This study successfully improved the mechanical properties of medium Mn steel by utilizing a multi-alloyed design principle and an intercritical rolling process, resulting in enhanced strength, ductility, and toughness. The increase in content and stability of retained austenite, along with the presence of nano-sized VC precipitates, played a significant role in achieving the ultrahigh yield strength and enhancing the transformation-induced plasticity effect for work hardening and damage resistance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Construction & Building Technology
Hui Guo, Linzhi Jiang, Junlin Tao, Yu Chen, Zhiqin Zheng, Bin Jia
Summary: The hybrid combination of steel and polypropylene fibers can enhance the toughness of high-strength concrete. Steel fibers have a greater impact on the toughness of HSC, while polypropylene fibers have a smaller effect. The optimal hybrid combination can improve the bending and tensile toughness of the concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yishuang Yu, Minliang Gao, Bin Hu, Chang Tian, Xuequan Rong, Zhenjia Xie, Hui Guo, Chengjia Shang
Summary: Simultaneous increases in strength and toughness in a high-strength low-alloy (HSLA) steel were achieved by tailoring the heterogeneous microstructure consisting of soft intercritical ferrite and hard martensite via intercritical heat treatment. Adjusting the distribution of alloy elements in different structures can improve the mechanical properties of materials.
Article
Engineering, Environmental
Yuchen Yang, Xiangshun Li, Junpeng Mi, Seeram Ramakrishna, Dongxiao Ji, Jianyong Yu, Rongwu Wang, Xiaohong Qin
Summary: This study resolves the conflict between high strength and toughness in high-performance fibers using the electrospinning technique. It demonstrates the successful fabrication of PET ultrafine fibers with super toughness and high strength.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
P. Han, Z. P. Liu, Q. Li, Z. J. Xie, X. L. Wang, R. D. K. Misra, C. J. Shang
Summary: In this study, a novel hierarchical microstructure design using intercritical quenching and tempering (IQ & T) was proposed to achieve a high strength of 1 GPa and low temperature toughness in a heavy low alloy steel plate. The hierarchical microstructure consisted of bimodal prior austenite grains with complex microstructure obtained via intercritical quenching and tempering. The novel hierarchical microstructure steel exhibited ultra-high yield strength and tensile strength, similar to conventional quenched and tempered (Q & T) steel, but with significantly higher low temperature impact energies.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Krzysztof K. Krawczyk, Alexander Wheeldon, Mithil Kamble, Karl Popovic, Paul Patter, Markus Postl, Maria Belegratis, Manfred Sieberer, Christine Bandl, Wolfgang Kern, Dan M. Constantinescu, Florin Baciu, Constantin Stochioiu, Dragos A. Apostol, Catalin R. Picu
Summary: In this work, we develop heterogeneousepoxies via additive printing to improve their ductility without compromising their strength and stiffness. By printing the resin and hardener components successively, we can control the local stoichiometric ratio and achieve both in-plane and out-of-plane local compositional and mechanical heterogeneity. We demonstrate significant improvement of ductility while retaining strength and stiffness of the printed heterogeneous materials, making use of commercially available inks and achieving 50 μm resolution of microstructural composition control.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Physical
Jesus Toribio, Francisco-Javier Ayaso, Rocio Rodriguez
Summary: This paper investigates the intercolonial microdamage (ICMD) induced by drawing in pearlitic microstructures. Through direct observation of the microstructure of progressively cold-drawn pearlitic steel wires, three types of ICMD were identified: intercolonial tearing, multi-colonial tearing, and micro-decolonization, all affecting two or more pearlite colonies. The evolution of ICMD is highly relevant to the subsequent fracture process of cold-drawn pearlitic steel wires, as the drawing-induced micro-defects act as weakest links or fracture promoters/initiators, affecting the microstructural integrity of the wires.
Article
Materials Science, Multidisciplinary
Cong Wu, Yongqing Zhao, Shixing Huang, Lei Lei, Qinyang Zhao, Qiaoyan Sun, Lian Zhou
Summary: Samples with different microstructures (BM, TM, LM) of a high strength Ti-5321 alloy were tested for impact performance, with results showing that LM had the highest impact toughness and crack initiation energy. SEM and EBSD analysis revealed the influence of microstructure on crack initiation and propagation during impact process, indicating that LM exhibited better impact properties due to its specific microstructure characteristics.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Shao-Bin Bai, Da-Zhao Li, Hui-Hu Lu, Wei-Qiang Niu, Wei Liang, Pei-Kang Bai, Zhi-Quan Huang
Summary: A novel strengthening strategy, warm rolling and intercritical annealing, was proposed to optimize the strength and ductility of a Fe-10.2 Mn-2.2Al-0.41C-0.6V (wt.%) steel. The strategy generated numerous microbands and nano-size VC particles in the warm-rolled samples, which activated the transformation-induced plasticity (TRIP) and twinning-induced plasticity (TWIP) effects. The synergistic effect of VC precipitates, microbands, dislocations, and TRIP and TWIP effects enhanced the ductility, tensile strength, and work hardening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Mingxing Zhou, Houxin Wang, Min Zhu, Junyu Tian, Xue Su, Qi Zhang, Aimin Guo, Guang Xu
Summary: This study investigates the effects of niobium (Nb) on the microstructure and impact toughness of high-carbon pearlitic steels. The addition of Nb significantly refines the pearlitic nodule and improves the impact toughness without compromising strength. The optimum addition of Nb for improved properties is found to be less than 0.015 wt%. The refinement of the prior austenite grains and retardation of pearlite growth are attributed to the solute-dragging effect of Nb during isothermal holding.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Swarnalata Behera, Rakesh Kumar Barik, Md Basiruddin Sk, Rahul Mitra, Debalay Chakrabarti
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Materials Science, Multidisciplinary
Rakesh Kumar Barik, Abhijit Ghosh, Md Basiruddin Sk, Sankalp Biswal, Amlan Dutta, Debalay Chakrabarti
Summary: This paper investigates the microstructure and crystallography of fully pearlitic steel to analyze the process and mechanism of crack propagation, highlighting the influence of lamellae orientation on crack propagation and proposing a mathematical model for crack propagation.
Article
Materials Science, Multidisciplinary
Rakesh Kumar Barik, Sankalp Biswal, Amlan Dutta, Debalay Chakrabarti, Abhijit Ghosh
Summary: Screw dislocation motion in bcc Fe has a significant impact on the temperature and strain rate sensitivity of flow stress, leading to the transition from ductile to brittle behavior in steel. Addition of solute atoms with attractive interaction with screw dislocations can reduce the flow stress sensitivity of Fe. This study investigates the effect of Ni and Cu solute atom distribution on screw dislocation motion in bcc Fe through molecular statics and dynamics simulations. Results show that the local distribution of Ni atoms greatly influences the Peierls stress of Fe, while Cu atom distribution has minimal effect. Furthermore, the presence of Ni/Cu atoms ahead of the dislocation line helps reduce the Peierls stress due to the attractive interaction with dislocations.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Ravindran Rejeesh, Rakesh Kumar Barik, Rahul Mitra, Andrii Kostryzhev, Chitta R. Das, Shaju K. Albert, Debalay Chakrabarti
Summary: The present study investigates the effect of B and N concentrations and austenitization temperature on the microstructure and mechanical properties of modified 9Cr-1Mo (P91) steels. The results show that the ductile-brittle transition temperature (DBTT) of B-added steels decreases with increasing austenitization temperature, with the steel containing 100 ppm B offering the lowest DBTT. The strength increases with increasing austenitization temperature, but ductility slightly decreases. The formation of fine B-rich precipitates during tempering contributes to the improved combination of tensile and Charpy impact properties in the steel with 100 ppm B.
Article
Materials Science, Multidisciplinary
Rakesh Kumar Barik, Abhijit Ghosh, Debalay Chakrabarti
Summary: This review focuses on the mechanism of screw dislocation motion in ferritic steels and compares the experimental and simulation results of kink-pair activation energy. The effect of different alloying elements on the overall flow stress sensitivity is also discussed, and the importance of screw dislocation in predicting the ductile to brittle transition temperature is explored.
Article
Nanoscience & Nanotechnology
Rakesh Kumar Barik, Sankalp Biswal, Khilesh Kumar Bhandari, Abhijit Ghosh, Debalay Chakrabarti
Summary: This study investigates the micro-mechanisms of cleavage fracture in a low carbon ferritic steel through EBSD crack path analysis and molecular dynamics fracture simulation. The experimental results reveal that the {100} crystallographic plane is the predominant cleavage plane, with occasional cracking along the secondary {110} cleavage plane. Cracking along the {110} plane is particularly feasible when the {100} planes within a grain exhibit significant twist angles with the preceding crack plane. The fracture also results in the formation of tongue-like features on the fracture surface, which is attributed to intermittent nucleation of symmetric {112}<111> type twins across the crack front.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Abhisek Mandal, Rakesh Kumar Barik, Ankita Bhattacharya, Debalay Chakrabarti, Claire Davis
Summary: Two different ultra-high-strength B-containing steel strips were treated with Ti and Al respectively and processed under different temperature ranges to study their mechanical properties. The results showed that a softer bainitic microstructure formed at higher coiling temperatures is preferred for bendability and impact toughness, while a hard surface layer dominated by martensite developed at lower coiling temperatures is undesired for these properties. The improvement in impact toughness at -40°C is attributed to the intensification of high angle boundaries, refinement of effective grain size, and the reduction of detrimental 'rotated cube' texture component. It was also found that a decrease in yield strength, increase in ductility, and tensile toughness are beneficial for bendability and USE.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Ankita Bhattacharya, Rakesh Kumar Barik, Supriya Nandy, Mainak Sen, T. S. Prithiv, Sudipta Patra, Rahul Mitra, Debalay Chakrabarti, Abhijit Ghosh
Summary: This study investigates the effectiveness of martensite nano-twins in medium carbon armor grade martensitic steel on local cleavage crack resistance. Analyzes using electron channeling contrast imaging and electron back scattered diffraction techniques demonstrate that fine twins with width less than 10 nm are ineffective in deflecting cracks on the {100} cleavage plane. On the other hand, coarse twins resist crack propagation by deflecting it through stepwise crack path propagations, such as a combination of matrix-twin {100} cleavage cracking or a combination of matrix {100} and twin-matrix {112} interface cracking. The interfacial cracking along the {112} twin boundaries is attributed to the presence of carbon enriched clusters along the twin boundaries.
Proceedings Paper
Materials Science, Multidisciplinary
J. Pany, R. K. Barik, S. K. Sahoo, S. C. Patnaik, J. Majhi, A. B. Pattnaik
MATERIALS TODAY-PROCEEDINGS
(2020)
