Article
Materials Science, Multidisciplinary
Xinyun Duan, Yufeng Huang, Wenyang Liu, Qingshan Cai, Wensheng Liu, Yunzhu Ma
Summary: In this study, W-xTa alloys with different Ta contents were fabricated using the arc-melting method, and the effects of Ta on the microstructure and mechanical properties of the alloys were investigated. The results showed that the addition of Ta could refine the grain size of W alloys and improve their hardness and strength, achieving the best comprehensive mechanical properties.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Meng-Zhe Zhao, Hong-Mei Qiu, Ze-Ya Zhu, Yun-Li Xu, Zhu-Hong Liu, Li-Qing Pan
Summary: The crystal structure, phase transition, metamagnetic behavior and magnetic entropy change of Mn49-xCuxNi41Sn10(x = 0-2) alloys were studied. The alloys were found to have a highly ordered cubic L2(1) Heusler structure. With the addition of Cu element, the martensitic transformation and inverse martensitic transformation were observed in all samples. The magnetic properties of the alloys, including saturation magnetization and transformation temperatures, were found to be influenced by the Cu content. The alloys exhibited positive values of magnetic entropy change near the martensitic transformation, with the alloy Mn47Cu2Ni41Sn10 showing a significant value of 32.0 J/BULL;kg(-1)& BULL;K-1 when a magnetic field of 3 T was applied.
Article
Nanoscience & Nanotechnology
J. G. Lopes, Priyanka Agrawal, Jiajia Shen, N. Schell, Rajiv S. Mishra, J. P. Oliveira
Summary: In recent years, high entropy alloys (HEAs) have been explored as potential alternatives to traditional engineering alloys. Efforts have been made to improve their mechanical properties and discover new HEAs due to the multitude of compositions allowed by these materials. The processability of HEAs, particularly in welding, is an important topic that needs to be studied. This research examines the microstructure and mechanical behavior of defect-free joints in a Fe50Mn30Co10Cr10 HEA achieved through Gas Tungsten Arc Welding (GTAW). The resulting joints exhibit excellent mechanical performance, making them viable for real-life applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Andrii Dubinko, Chao Yin, Dmitry Terentyev, Aleksandr Zinovev, Michael Rieth, Steffen Antusch, Monika Vilemova, Jiri Matejicek, Tao Zhang
Summary: The mechanical properties of various tungsten grades for applications in a nuclear fusion environment were assessed in this study. The research focused on bending tests, microstructural analysis, and TEM observation of different tungsten-based materials at 600 degrees C. The obtained data will be crucial for assessing the impact of neutron irradiation on the materials.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yi-Siang Lin, Ying-Chou Lu, Chun-Hway Hsueh
Summary: A series of (CoCrNi)100-xGdx (x = 0/0.1/0.3/0.5/1.0) medium entropy alloys (MEAs) were fabricated and the effects of Gd additions on the microstructures and mechanical properties of CoCrNi MEAs were studied. With increasing Gd concentration, the phase transformed from face-centered cubic (FCC) to hexagonal close-packed (HCP) precipitates in the FCC matrix. The CoCrNi99.5Gd0.5 MEA exhibited significantly enhanced mechanical properties compared to the single-phase CoCrNi MEA.
Article
Nanoscience & Nanotechnology
Yuming Xie, Xiangchen Meng, Ranzhuoluo Zang, Yuexin Chang, Long Wan, Yongxian Huang
Summary: Deformation-driven modification was utilized to exploit the microstructural potential of lightweight high-entropy alloys, achieving high strength and ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Editorial Material
Chemistry, Physical
Roland E. Loge
Summary: Dynamic recrystallization is a technique that refines grain structures in metals and adjusts their properties. Confining recrystallization within prior nanoscale twinning allows for achieving exceptional grain refinement.
Article
Nanoscience & Nanotechnology
Jiajia Shen, Priyanka Agrawal, Tiago A. Rodrigues, J. G. Lopes, N. Schell, Jingjing He, Zhi Zeng, Rajiv S. Mishra, J. P. Oliveira
Summary: Weldability studies on high entropy alloys are lacking, hindering their practical applications. In this study, an as-cast Fe42Mn28Co10Cr15Si5 metastable high entropy alloy was welded for the first time using gas tungsten arc welding. The effect of weld thermal cycle on the microstructure evolution was analyzed through various techniques. The results showed the evolution of microstructure across the joint and the influence of different strengthening effects on the material's local strength. The presence of a brittle nanosized sigma phase was found to contribute to premature failure in the joints during mechanical testing.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Barnasree Chanda, Jayanta Das
Summary: The evolution of microstructure and hardness homogeneity in CoCrFeNiNbx eutectic high entropy alloys solidified at different cooling rates has been investigated. The results show that increasing the cooling rate can improve the yield strength and hardness of the alloy, as well as promote microstructure homogeneity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Anna Dobkowska, Aleksandra Zielinska, Irena Paulin, Crtomir Donik, Maciej Lojkowski, Milena Koralnik, Boguslawa Adamczyk-Cieslak, Krystian Paradowski, Marek Tkocz, Dariusz Kuc, Jiri Kubasek, Matjaz Godec, Wojciech Swieszkowski
Summary: We investigated the microstructure, mechanical, and corrosion properties of an AZ61 alloy extruded using the KoBo method. The KoBo method enables extrusion of AZ61 without preheating and results in significant microstructure refinement. However, this study found that it did not enhance the strength or corrosion resistance of the AZ61 alloy. The continuously precipitated Mg17Al12 phase along the grain boundaries was identified as the main factor affecting the alloy's properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Sujit Das, P. S. Robi
Summary: Refractory high entropy alloys (RHEAs) exhibit high strength, high hardness and stable microstructure over a wide range of temperatures, but they have poor ductility. Attempts to improve mechanical properties are made by altering the composition of existing RHEAs. Two RHEAs show different mechanical properties at room and elevated temperatures.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Peyman Asghari-Rad, Nhung Thi-Cam Nguyen, Alireza Zargaran, Praveen Sathiyamoorthi, Hyoung Seop Kim
Summary: Superplasticity, especially high-strain rate superplasticity (HSRS) at a strain rate equal to or higher than 10(-2) s(-1), shows significant technological potential in the shape-forming of engineering materials. The formation of liquid phase at grain boundaries/interfaces can assist HSRS, and designing grain boundary segregation of a low melting temperature element in multi-principle element alloys (MPEAs) can promote HSRS by partial melting. This study demonstrated the trace of liquid phase in Al0.3CoCrNi MPEA and the possibility of tailoring microstructure for promoting HSRS in high-strength materials by grain boundary segregation engineering.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Melanea Almeida Ramalho Medeiros, Carlos Jose de Araujo
Summary: Ternary alloys based on the NiTi system with the addition of Nb have shown improved shape memory properties and were evaluated for their microstructure and mechanical behavior. The Nb content had limited effect on phase transformation temperatures, leading to decreased hardness but a relatively small impact on the elastic modulus.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Wojciech Polkowski, Grzegorz Bruzda, Adelajda Polkowska, Izabela Krzak, Adam Tchorz, Rafal Nowak, Artur Kudyba, Marzanna Ksiazek, Krzysztof Karczewski
Summary: In this study, the structure of selected Si-B binary alloys was investigated, revealing the co-existence of various silicon borides. The microstructure, crystal structure, and mechanical properties of each alloy were described based on experimental results. It was found that the mechanical properties of silicon borides (microhardness and Young modulus) increase with increasing boron content. The fracture toughness of silicon borides assessed through indentation experiments was found to be in the range of 2.13-3.29 MPa·m1/2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Kaouther Zaara, Virgil Optasanu, Sophie Le Gallet, Lluisa Escoda, Joan Saurina, Frederic Bernard, Mohamed Khitouni, Joan-Josep Sunol, Mahmoud Chemingui
Summary: Soft magnetic Fe65Ni28Mn7 alloy was synthesized by mechanical alloying and spark plasma sintering, and its properties were compared with those of the same composition prepared by arc melting. The SPS conditions were tested, and the structure, phase composition, and morphology of the samples were investigated using X-ray diffraction and scanning electron microscopy. It was found that SPS and arc melting synthesis produced stable FCC phases, while mechanical alloying resulted in hard magnetic behavior. The mechanically alloyed sample exhibited a fine microstructure and the consolidated SPS sample showed improved mechanical properties and soft magnetic behavior.
Article
Materials Science, Multidisciplinary
Katerina Skotnicova, Gennady S. Burkhanov, Natalia B. Kolchugina, Miroslav Kursa, Tomas Cegan, Alexander A. Lukin, Ondrej Zivotsky, Pavel A. Prokofev, Jan Jurica, Ying Li
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Yvonna Jiraskova, Jiri Bursik, Jakub Ederer, Pavel Janos, Jan Jurica, Jiri Lunacek, Ondrej Zivotsky
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2020)
Article
Biochemistry & Molecular Biology
Tomas Cegan, Daniel Petlak, Katerina Skotnicova, Jan Jurica, Bedrich Smetana, Simona Zla
Article
Chemistry, Physical
Hana Ovcacikova, Jozef Vlcek, Vlastimil Matejka, Jan Jurica, Petra Maierova, Petr Mlcoch
Article
Chemistry, Physical
Tomas Cegan, Marek Pagac, Jan Jurica, Katerina Skotnicova, Jiri Hajnys, Lukas Horsak, Kamil Soucek, Pavel Krpec
Article
Chemistry, Physical
Juraj Lapin, Michaela Stamborska, Tatiana Pelachova, Tomas Cegan, Anastasia Volodarskaja
Article
Materials Science, Multidisciplinary
Pravir Kumar, Katerina Skotnicova, Ashis Mallick, Manoj Gupta, Tomas Cegan, Jan Jurica
Summary: The study found that alloying and nano-reinforcement can significantly improve the mechanical properties of Mg-based alloys and composites, particularly in terms of microhardness, tensile strength, and compressive strength.
Article
Chemistry, Physical
Anna Knaislova, Pavel Novak, Jiri Linhart, Ivo Szurman, Katerina Skotnicova, Jan Jurica, Tomas Cegan
Summary: Intermetallic compounds based on Ti-Al- (Si) are attractive materials with good thermal stability and low density. Different production technologies are currently available, but they have certain disadvantages, which can be overcome by modifying melting technology. This may increase the cost of the process.
Article
Materials Science, Composites
David Krzikalla, Jakub Mesicek, Radim Halama, Jiri Hajnys, Marek Pagac, Tomas Cegan, Jana Petru
Summary: This study focused on experimental and numerical examination of the flexural properties of FDM long carbon fibre reinforced composites with polymeric matrix of Onyx through 3-point bending test. The reinforced layer distribution was found to be crucial over the fibre content, with comparable longitudinal material constants but dissimilar shear and transversal constants.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Crystallography
Jitka Malcharczikova, Katerina Skotnicova, Petr Kawulok, Rostislav Kawulok, Ivo Szurman, Jana Ruzicka
Summary: Ni-Al-Mo based alloys with directionally solidified structure and unique properties are promising for high temperature applications. The compression test results demonstrate their high yield strength and maximal flow stress.
Article
Metallurgy & Metallurgical Engineering
V. A. Ermishkin, N. A. Minina, S. P. Kulagin, N. A. Palii, A. K. Tomenko
Summary: The modern technologies of mechanical and heat treatment of metals and alloys are based on understanding of organic relationship between the physicomechanical properties of materials and their structural state. It is difficult to express the mechanical properties of materials in the form of contribution of individual structural constituents due to complexity of simultaneous evaluation of all parameters of the structural state of a material and its mechanical properties. Therefore, the methods of description of structural state deserve attention based on generalized parameters expressed in terms of sets of variables describing the influence of various structural defects.
RUSSIAN METALLURGY
(2021)
Article
Metallurgy & Metallurgical Engineering
O. A. Bannykh, I. N. Lukina, E. Drozdova, O. P. Chernogorova, E. A. Ekimov, V Benavides, M. M. Liakhovitsky, N. A. Minina, A. Khomich, V. A. Tedzhetov
Summary: The properties of reinforcing carbon particles obtained from fullerenes by synthesis of metal-matrix composite materials were studied by high-temperature indentation up to 500 degrees C. The hardness and elasticity of the carbon phase were retained up to 400 degrees C but decreased abruptly at 500 degrees C due to graphitization. Graphitization at 500 degrees C decreased the friction coefficient and wear resistance of the samples.
RUSSIAN METALLURGY
(2021)
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)