Article
Materials Science, Multidisciplinary
Ilkka Miettunen, Sumit Ghosh, Mahesh C. Somani, Sakari Pallaspuro, Jukka Komi
Summary: Traditional quenching and partitioning (Q&P) treated steels are usually alloyed with silicon (Si) but the exact role of Si in microstructural mechanisms during partitioning process is not fully understood. This study combines dilatometric analysis with detailed microstructural characterization to reveal competing mechanisms during partitioning. Three 0.4 wt.% carbon steels with varying Si contents were quenched and partitioned at different temperatures, showing that Si content affects bainitic transformation, austenite retention, and carbide precipitation. Silicon retards austenite decomposition at higher temperatures but does not improve carbon partitioning at lower temperatures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Dong Zhang, Huan Zheng, Tingping Hou, Feng Hu, Peng Zheng, Kaiming Wu
Summary: The effect of natural aging on the microstructure of carbides and martensite in high chromium cast iron was studied using experimental and theoretical methods. It was found that fine eta-(Fe, Cr)2C carbides precipitated from the martensite matrix during natural room temperature aging, resulting in a significant increase in hardness (by 3.4 HRC). This hardness increase was attributed to the fine precipitation of M2C carbides observed by transmission electron microscopy and the high Cr content in the eta-(Fe, Cr)2C carbides confirmed by first-principles calculations.
Article
Crystallography
Evgeniy Tkachev, Sergey Borisov, Yuliya Borisova, Tatiana Kniaziuk, Rustam Kaibyshev
Summary: The impact of quenching and partitioning processing on the strength, ductility, and fracture toughness of a specific steel composition was studied. The presence of different structural constituents in the steel resulted in no clear correlation between strength, ductility, and fracture toughness.
Article
Metallurgy & Metallurgical Engineering
V. P. Shveikin, V. P. Kuznetsov, I. S. Kamantsev, E. Senaeva, S. Kuznetsov
Summary: The effect of heat treatment modes on the structure and strength of tool steel Fe - 12% Cr - 0.8% Mo - 0.9% V - 1.6% C is analyzed. The temperatures for quenching and tempering to achieve maximum hardness and strength, while maintaining satisfactory ductility, are determined.
METAL SCIENCE AND HEAT TREATMENT
(2022)
Article
Metallurgy & Metallurgical Engineering
Bing Wang, Hong-Lin Zhang, Bin Xu, Hai-Yang Jiang, Ming-Yue Sun, Dian-Zhong Li
Summary: The mechanical properties and microstructure of 15CrNi3MoV alloy steel were studied under different quenching rates. The microstructure was characterized by SEM, EBSD, and TEM, and the low-temperature impact toughness was evaluated. The results showed that the tempered microstructure and mechanical properties were highly sensitive to the quenching rate.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Sergey Borisov, Yuliya Borisova, Evgeniy Tkachev, Tatiana Kniaziuk, Rustam Kaibyshev
Summary: The addition of Si in 0.33C-1.8Si-1.44Mn-0.58Cr steel leads to a unique tempering behavior, characterized by two distinct sequential stages. Stage I involves precipitation of transition carbides, increasing strength, ductility, and toughness. Stage II involves decomposition of retained austenite to bainitic ferrite and transition carbides. Stage III does not occur due to Si addition suppressing the precipitation of cementite. Low-temperature tempering leads to the formation of transition carbides, increasing ductile fractures and improving impact toughness without strength degradation.
Article
Chemistry, Physical
Matthias Steinbacher, Stefanie Hoja
Summary: Optimizing the pre-heat treatment can enhance the performance of nitrided components. Changing the austenitization temperature and utilizing bainitic treatment instead of quenching and tempering can significantly improve hardness and strength.
Article
Materials Science, Multidisciplinary
Roman Mishnev, Yuliya Borisova, Tatiana Kniaziuk, Sergey Gaidar, Rustam Kaibyshev
Summary: The effect of tempering after water quenching on the strength and fracture toughness of two steels with specific chemical compositions was studied. The precipitation of transition ?-Fe2C carbides in martensitic matrix increased fracture toughness and eliminated quench embrittlement in one of the steels. On the other hand, tempered martensite embrittlement at higher tempering temperature resulted in decreased impact energy, ductility, and strength and elongation for the other steel.
Article
Materials Science, Coatings & Films
Yan Liu, Tong Wang, Ze-yu Li, Jian-xun Zhang
Summary: This study investigated the performance of boron-containing 17Cr-2Ni steel melted by plasma arc under as-deposited and heat-treated conditions, with various double austenitizing treatments conducted to improve mechanical properties. The results demonstrated significant improvements in hardness, strength, and ductility of the deposits through different treatments, showcasing the potential for enhancing the overall performance of the steel.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Metallurgy & Metallurgical Engineering
D. A. Gorlenko, A. N. Zavalishchin, M. Rumyantsev
Summary: The properties of cast iron rolls after multiple tempering operations are studied, with X-ray diffraction and phase analyses performed to determine the temperature range of phase transformations in the iron. Tests for abrasive wear and measurements of hardness are conducted. It is found that multiple tempering reduces the content of soft structural components in the rolls and increases the content of hard phases, leading to improved hardness and wear resistance of the working layer.
METAL SCIENCE AND HEAT TREATMENT
(2022)
Article
Materials Science, Coatings & Films
Ke Zhan, Yalong Zhang, Lei Bao, Zheng Yang, Bin Zhao, Vincent Ji
Summary: By optimizing the laser quenching power and dual shot peening intensity, the residual stress and hardness of QT-700-2 were significantly increased, leading to an improvement in the uniformity of hardness distribution. The surface characteristics and wear resistance of the material were greatly enhanced.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
E. Skolek, K. Szwejkowska, K. Chmielarz, W. A. Swiatnicki, D. Myszka, A. N. Wieczorek
Summary: The aim of this study was to characterize the microstructure and properties of cast steel after austempering heat treatment in order to produce a carbide-free nanobainite. The heat treatment parameters were designed based on dilatometric measurements of phase transformation kinetics. Microscopic studies revealed that the heat treatment resulted in a refined multiphase microstructure, with the obtained microstructures providing high tensile strength. However, toughness was found to be strongly dependent on the applied heat treatment parameters.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Metallurgy & Metallurgical Engineering
Zafer Ozdemir
Summary: The study investigated the effect of shallow cryogenic treatment on the mechanical properties of bimetallic castings used in the crushing industry. By comparing different treatment methods, a significant change in hardness and impact energy was observed after shallow cryogenic treatment.
INTERNATIONAL JOURNAL OF METALCASTING
(2021)
Article
Metallurgy & Metallurgical Engineering
G. K. Bansal, Chiradeep Ghosh, V Rajinikanth, S. Ghosh Chowdhury
Summary: The study found that the finish rolling temperature significantly affects the macroscopic properties of the steel, with lower temperatures resulting in higher hardness and strength while maintaining comparable ductility.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2021)
Article
Metallurgy & Metallurgical Engineering
Jiao-jiao Bai, Feng Yu, Cun-yu Wang, Hui Wang, Yang Xu, Xing-pin Chen, Wen-quan Cao
Summary: This study investigates the effect of cyclic quenching treatment on the evolution process and properties of ductile cast iron (DCI). The results show that the microstructure and performance of DCI strongly depend on the number of cycles in the cyclic quenching treatment. Increasing the number of cycles refines the grain size of austenite, decreases the length and width of lath/plate martensite, and changes the morphology of retained austenite.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)