Article
Nanoscience & Nanotechnology
Shichun Liu, Haokai Dong, Yubo Li, Zhigang Yang, Hao Chen
Summary: This study explores the potential effects of flash annealing on the microstructure and mechanical properties of cold-rolled NANOHITEN ferritic steel. The process results in an ultrafine-grained heterostructured matrix, composed of recrystallized/transformed and non-recrystallized/transformed domains, leading to a high strength level of 1 GPa without significant loss in ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nuclear Science & Technology
Wen Zeng, Ming Zhou, Mei Yang, Risheng Qiu
Summary: The influence of Zr content ranging from 0 to 1.36 wt.% on the microstructure and mechanical properties of 12Cr ferritic/martensitic steels was investigated. It was found that Zr acts as a ferrite-forming alloy element in the steels, leading to an increase in the proportion of ferrite phase with increasing Zr content, while decreasing strength but increasing ductility.
FUSION ENGINEERING AND DESIGN
(2022)
Article
Nanoscience & Nanotechnology
Chao Cheng, Ye Feng, Zhiyong Chen, Hong En Li, Qingjiang Wang, Xin Wang
Summary: This study investigated the influence of annealing temperature on the microstructure, texture, and tensile properties of a high temperature titanium alloy sheet. The results showed that annealing temperature had a significant impact on the microstructure and texture of the sheet, which in turn affected the tensile strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Guofeng Zhang, Suotao Wang, Shuguang Liu, Yuxing Guo, Shunxing Liang, Shuzhi Zhang, Xinyu Zhang, Junsong Zhang, Riping Liu
Summary: The microstructure and tensile properties of a newly designed Fe-27Mn-10Al-1.4C-0.1V-0.1Nb lightweight steel were investigated. The steel exhibited non-recrystallized austenite grains, recrystallized grains, and nano-sized (V,Nb)C particles and kappa-carbides after annealing. It achieved high tensile strength and excellent ductility. The pinning effect of (V,Nb)C particles and the refinement of slip bands improved the material's work hardening rate. Microband refinement dominated the deformation microstructure at later stages.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Metallurgy & Metallurgical Engineering
Vinit Kumar Singh, Radhakanta Rana, Shiv Brat Singh, Amrita Kundu
Summary: This study investigated the microstructural modification and the effects of cold/warm rolling and annealing on the tensile properties of ferritic low density steels with different carbon (0.0035 mass%, Steel 1 and 0.04 mass%, Steel 2) and aluminium (6.8 mass%, Steel 1 and 9.7 mass%, Steel 2) contents, focusing on the amount of ferrite, grain size, and formation of Fe3Al intermetallic. Steel 1 was deformed by cold rolling at room temperature, while Steel 2 was deformed through warm rolling at 250 degrees C to prevent crack formation. After rolling, samples of Steels 1 and 2 were annealed at 900 degrees C for 5 minutes. The annealing process resulted in an increase in yield strength, ultimate tensile strength, and ductility, as well as a decrease in the yield ratio. This was attributed to the formation of Fe3Al intermetallic and reduction in ferrite grain size. The presence of high interstitial carbon in Steel 2 led to a yield point phenomenon, which may negatively impact the steel's formability. Cracks initiated at the ferrite grains and grain boundaries, and fracture occurred in a quasi cleavage mode in both Steels 1 and 2. The grain refinement and microstructural changes due to rolling and annealing contributed to the good combination of strength and ductility in both steels.
ISIJ INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Qinyu He, Chengyi Zhu, Yulong Liu, Wen Yan, Xiangliang Wan, Guangqiang Li
Summary: The microstructure, texture, mechanical properties, and magnetic properties of low carbon and silicon non-oriented electrical steels annealed at different temperatures were investigated. The results showed the presence of various precipitates, including fine precipitates and composite precipitates, in the samples annealed at higher temperatures. The magnetic properties of the experimental samples were found to be superior to commercially available steels of the same grade.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Zhanjiang Li, Xuekun Ding, Li Chen, Jichang He, Junfeng Chen, Jia Chen, Nengbin Hua, Pinqiang Dai, Qunhua Tang
Summary: This study systematically investigated the effects of Si content and annealing temperature on the microstructural evolution and tensile properties of FeCoCrNiMnSix high-entropy alloys. The results showed that increasing Si content led to an increase in alloy strength and a decrease in recrystallization ratio during annealing. By changing the CRA temperature and Si content, a heterogeneous grain structure with high yield strength and good ductility was obtained.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
M. Nagini, R. Vijay, K. Satya Prasad, A. V. Reddy, G. Sundararajan
Summary: The study investigated the tensile fracture behavior of oxide dispersion strengthened 18Cr ferritic steels and oxide-free 18Cr steels, revealing that the ODS-18Cr steels exhibit higher strength and lower ductility due to the development of ultrafine grained structure and nanosized dispersion of oxide particles. The fracture mechanism is primarily ductile fracture with distinct neck and shear lip formation.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Christoph Kickinger, Clemens Suppan, Thomas Hebesberger, Ronald Schnitzer, Christina Hofer
Summary: A new heat treatment method for partially ferritic Q&P steel was investigated, introducing ferrite through slow gas jet cooling after full austenitization. Results showed that both partially ferritic heat treatments significantly increased elongation, with IC treatment resulting in a better combination of local and global formability.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Coatings & Films
Biao Huang, Er-geng Zhang, Hao-ming Du, Qiang Chen, Dan-dan Liang, Qi An, Qiong Zhou
Summary: The microstructure, mechanical properties, and tribological properties of CrAlTiN coatings were systematically investigated at different annealing temperatures. The results show that the hardness of the coating decreases with increasing annealing temperature, while the elastic strain resistance first increases and then decreases. The preferred annealing temperature effectively regulates the microstructure and improves the mechanical and tribological properties of the CrAlTiN coating.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Bernd Kuhn, Michal Talik
Summary: This paper discusses the influence of forming parameters on the microstructure and achievable creep properties of high-performance ferritic stainless steels. Thermomechanical treatment is shown to effectively enhance the creep strength of the materials, offering potential cost savings in component production.
Article
Nanoscience & Nanotechnology
G. Ressel, M. Gsellmann, D. Brandl, A. Landefeld, A. Keplinger, Z. L. Zhang, V Maier-Kiener, R. Schnitzer
Summary: Cu is considered a promising element to improve corrosion resistance in duplex steels, but there is limited research on its influence on the microstructure in the aged condition. This study fills that gap by showing the precipitation of Cu particles leading to intragranular austenite formation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nuclear Science & Technology
G. J. Zhang, Y. Zhou, J. F. Yang, H. Y. Yang, M. M. Wang, K. Jing, Z. M. Xie, L. C. Zhang, R. Liu, G. Li, H. Wang, L. Li, Q. F. Fang, X. P. Wang
Summary: 9Cr-F/M-xSi (x = 0-1.0 wt%) steels with a ferrite/martensitic structure and precipitated M23C6 and MX phases were fabricated and characterized. The addition of silicon led to an increase in ultimate tensile strength and hardness, while the total elongation remained constant. The solid solution strengthening mechanism played a more significant role than carbide precipitation. These findings have implications for the composition design of materials for nuclear reactors.
NUCLEAR MATERIALS AND ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Hyungkwon Park, Changuk Lee, Kyeong-Won Kim, Sung-Dae Kim, Jae Hoon Jang, Heon-Young Ha, Joonoh Moon, Chang-Hoon Lee, Seong-Jun Park
Summary: This study investigates the machinability of austenitic LWS and the impact of MnS formation on its mechanical and machinability properties. The research finds that the number and area fraction of MnS inclusions increase linearly with the increase of S content, while the size of inclusions first increases rapidly and then slows down. The tensile properties remain unchanged regardless of the S content, but the impact energy deteriorates linearly with the increase of S content. Additionally, the formation of MnS inclusions significantly improves the machinability of LWS by acting as sites of mechanical stress concentration and generating thermal cavity and pores during machining.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Asim Ahmad Riaz, Ghulam Hussain, Naveed Ullah, Hongyu Wei, Mohammed Alkahtani, Muhammad Naeem Khan
Summary: This study investigates the influence of tool rotational speed on post-ISF tensile properties of two tempers of Al2219 alloy. It is found that post-ISF tensile strength of both tempers experiences a drop with increasing tool speed, with O-temper generally enduring a gain while T6 temper endures a loss in strength. The microstructural variations caused by spindle rotation play a significant role in reducing the yield and tensile strengths of the material.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Yunik Kwon, Ji Hyun Hwang, Hee Chae Choi, T. T. T. Trang, Byoungkoo Kim, A. Zargaran, Nack J. Kim
METALS AND MATERIALS INTERNATIONAL
(2020)
Article
Materials Science, Multidisciplinary
Jisung Yoo, Won-Mi Choi, Byeong-Joo Lee, Gi-Yong Kim, Hyungjun Kim, Won-Doo Choi, Yong-Jun Oh, Sunghak Lee
METALS AND MATERIALS INTERNATIONAL
(2020)
Article
Materials Science, Multidisciplinary
Majid Jafari, Chan-Woo Bang, Jong-Chan Han, Kyeong-Min Kim, Seon-Hyeong Na, Chan-Gyung Park, Byeong-Joo Lee
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2020)
Article
Chemistry, Physical
Dong Geun Kim, Yong Hee Jo, Jeong Min Park, Won-Mi Choi, Hyoung Seop Kim, Byeong-Joo Lee, Seok Su Sohn, Sunghak Lee
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Nanoscience & Nanotechnology
Junha Yang, Yong Hee Jo, Dae Woong Kim, Won-Mi Choi, Hyoung Seop Kim, Byeong-Joo Lee, Seok Su Sohn, Sunghak Lee
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Materials Science, Multidisciplinary
Min Chul Jo, Jisung Yoo, Min Cheol Jo, Alireza Zargaran, Seok Su Sohn, Nack J. Kim, Sunghak Lee
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
J. H. Hwang, T. T. T. Trang, O. Lee, Gyeongbae Park, A. Zargaran, Nack J. Kim
Article
Materials Science, Multidisciplinary
Seok Gyu Lee, Bohee Kim, Min Cheol Jo, Kyeong-Min Kim, Junghoon Lee, Jinho Bae, Byeong-Joo Lee, Seok Su Sohn, Sunghak Lee
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2020)
Article
Nanoscience & Nanotechnology
Min Chul Jo, Min Cheol Jo, Alireza Zargaran, Seok Su Sohn, Nack J. Kim, Sunghak Lee
Summary: Austenitic high-Mn steels exhibit a combination of twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) mechanisms, with partial recrystallization enhancing yield strength achieved by the precipitation of (V + Mo) complex carbides. Adding aluminum alloy can increase yield strength and achieve 1 GPa of yield strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Ji Hyun Hwang, A. Zargaran, Gyeongbae Park, O. Lee, B-J Lee, Nack J. Kim
Summary: The deformation behavior of a magnesium alloy containing 1% aluminum has been investigated in this study. The alloy shows much higher strength and larger elongation compared to pure magnesium with similar texture and grain size. Non-basal slips are easily activated in the Mg-1Al alloy at an early stage of deformation, leading to strain localization along the initially formed slip lines with increasing tensile strain.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
A. Zargaran, T. T. T. Trang, Gyeongbae Park, Nack J. Kim
Summary: Utilizing kappa-carbide nanoparticles to promote the formation and engineer the morphology of B2 phase, a novel precipitation hardened hot rolled lightweight steel with excellent combination of ultrahigh specific strength and ductility has been fabricated, leading to a significant enhancement in precipitation strengthening and work hardening capability.
Article
Chemistry, Physical
Dong Geun Kim, Min Cheol Jo, Hyoung Seop Kim, Byeong-Joo Lee, Sunghak Lee, Seok Su Sohn
Summary: This study investigated the compressive properties of two SiVCrMnFeCo alloys with different initial microstructure and stability under dynamic and cryogenic conditions. The results showed that adiabatic heating reduced the extent of deformation-induced martensitic transformation (DIMT) and increased the stability of face-centered cubic (FCC), but the activation of DIMT enhanced the overall compressive properties. However, the increase in DIMT also promoted shear localization and the formation of adiabatic shear bands (ASB), resulting in a deterioration of shear cracking resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Sang-Ho Oh, Yang-Jin Jeong, Sin-Hye Na, Jiman Kim, Byeong-Joo Lee
Summary: In this study, the fundamental reason for the formation of columnar Nb3Sn grains was investigated using a novel Monte Carlo Potts model. It was found that insufficient Sn at the interface leads to a decrease in thermodynamic driving force and the formation of columnar Nb3Sn grains. Possible ways to suppress columnar grain formation were suggested based on this understanding, and the difference in columnar grain fraction depending on the wire strand type was explored. A brief guideline for designing wire strand geometry to avoid columnar grain formation was proposed.
Article
Materials Science, Multidisciplinary
Jung Soo Lee, Guanglong Xu, Joung Sik Suh, Jun Ho Bae, Byeong-Chan Suh, Young Min Kim, Byeong-Joo Lee, Won-Seok Ko
Summary: Molecular dynamics simulations are used to study the deformation and twinning behavior of single-crystal Mg nanopillars under different loading orientations. The developed interatomic potential successfully reproduces the observed slip and twinning phenomena and provides insights into the nucleation and growth mechanisms of unconventional twins.
Article
Chemistry, Physical
Jin-Soo Kim, Byeong-Joo Lee
SURFACES AND INTERFACES
(2020)