Article
Chemistry, Physical
P. Emadi, B. Andilab, K. Borodianskiy, C. Ravindran
Summary: The use of lightweight alloys, such as magnesium, is crucial for improving fuel efficiency and reducing emissions in automobiles, as well as increasing the range of electric vehicles. This study investigated the effects of SiC nanoparticles on the microstructure and mechanical properties of Mg-Al-Zn-Mn alloy composites. The addition of SiC resulted in significant grain refinement, more uniform phase dispersion, and improved tensile strength, making it a promising material for strengthening light alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Duofei Zheng, Qingchun Zhu, Xiaoqin Zeng, Yangxin Li
Summary: The volume fraction and distribution of long-period stacking ordered (LPSO) phase have a significant impact on the strengthening of Mg alloys. The LPSO phase formed at grain boundary has a higher strengthening effect than that formed within the alpha-Mg matrix, but it compromises the solid-solution strengthening effect due to the consumption of alloying elements.
Article
Chemistry, Physical
Hongjing Cui, Ning Liu, Laima Luo, Yue Xu, Jigui Cheng, Yucheng Wu
Summary: In this study, a ternary W alloy containing 5 wt% V and 5 wt% Ta was fabricated using mechanical alloying and spark plasma sintering. The alloy exhibited a single-phase body centered cubic structure with (V, Ta)-enriched fine grains and W-enriched grains. It showed an ultrafine grain size and higher relative density, microhardness, and strength compared to pure W. The strengthening mechanisms were analyzed, and it was found that grain refinement, densification, and solid solution played different roles in strengthening. The alloy demonstrated good irradiation resistance, which was attributed to its ultrafine grains and higher compressive and tensile strength. The potential application of the W-5 wt%V-5 wt%Ta alloy as a plasma-facing material was suggested.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
J. Shi, Y. W. Zhao, C. L. Jiang, X. Wang, Y. Z. Zhang, D. L. Zou, H. Y. Xu, H. Huang, C. Luo
Summary: By utilizing the theory of mixing enthalpy and atomic-size difference, a uranium-containing high-entropy alloy with excellent compressive plastic properties has been successfully designed. It is found that reducing the average valence electron concentration may lead to high-ductility uranium-containing high-entropy alloys.
Article
Chemistry, Physical
Chenzeng Zhang, Cunguang Chen, Pei Li, Mengjie Yan, Qian Qin, Fang Yang, Wenwen Wang, Zhimeng Guo, Alex A. Volinsky
Summary: Powder metallurgy Cu-30Fe alloy was prepared using mechanical alloying, pressureless sintering, and rolling processes. The rolling process affected the alloy microstructure and physical properties. The Fe particles became elongated and changed shape, while the Cu grains became elongated and refined. The coordinated deformation of the Cu and Fe phases resulted in finer Cu grains near the Fe particles. After annealing, the cold-rolled Cu-30Fe alloy achieved a good combination of mechanical and functional properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
H. T. Jeong, H. K. Park, W. J. Kim
Summary: The deformation mechanisms and microstructural evolution of an Al0.7CoCrFeMnNi high-entropy alloy composed of dual phases have been studied, with results indicating that the most effective grain refinement can be achieved from a eutectic microstructure under specific deformation conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
M. Esmaeili Ghayoumabadi, A. G. Mochugovskiy, N. Yu Tabachkova, A. Mikhaylovskaya
Summary: This study aimed to improve the superplastic formability of Alloy AA6013 by refining its grain structure and controlling grain growth at elevated temperatures. Minor additions of Y, Sc, and Zr were considered. The results showed that the additions led to a noticeable refinement of the grain structure and the formation of dispersed particles. These effects inhibited recrystallization and dynamic grain growth, resulting in grain refinement and achieving superplasticity in the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
N. Yu Yurchenko, N. D. Stepanov, G. A. Salishchev, V. N. Serebryany, N. S. Martynenko, E. A. Lukyanova, L. L. Rokhlin, N. Birbilis, S. Dobatkin, Y. Z. Estrin
Summary: This article provides a report on the effect of multiaxial deformation (MAD) on the structure, texture, mechanical characteristics, and corrosion resistance of the Mg-0.8 (wt.)% Ca alloy. MAD was shown to improve the microstructure and texture, resulting in significant enhancements in mechanical properties and corrosion resistance of the alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Guoxing Zheng, Lei Wang, Yufei Zhang, Dongrui Sun, Qingyou Dong
Summary: The microstructures and mechanical properties of a rolled Mg-3Al-3Nd-0.5Mn alloy were studied in this research. It was found that the rolling process successfully produced a mixed crystal structure in the alloy, due to the refinement of grains by Al2Nd, Al8Mn4Nd phases, and broken Al11Nd3. The precipitation of nano-sized Al8Mn4Nd during the rolling process also promoted the formation of a mixed crystal structure. Comparing the rolled alloys to the as-cast alloys, there was an increase in Yield Strength (YS) and Ultimate Tensile Strength (UTS) of 107.4 MPa and 48.4 MPa, respectively.
Article
Chemistry, Physical
Edyta Matyja, Krystian Prusik, Maciej Zubko, Grzegorz Dercz
Summary: The Ni45.5Co4.5Mn36.6In13.(4) alloy obtained from pre-alloyed powder through arc melting demonstrates finer sub-grain size and improved mechanical strength compared to the reference sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
L. Lu, Q. W. Xia, F. Zhao, J. C. Shi, S. N. Luo, Y. Cai
Summary: By applying high strain-rate plastic deformation treatment using gas gun loading, the mechanical properties of a titanium alloy were modified, resulting in the specimen shocked at 609 m/s exhibiting the best strength-toughness tradeoff.
Article
Nanoscience & Nanotechnology
Dongyang Qin, Feng Zhao, Yulong Li
Summary: In this paper, a homogeneous bimodal Ti-5553 alloy with a prior-beta grain size of 15 μm is successfully fabricated through elaborate thermo-mechanical processing in the alpha+beta field, solution, and aging. The strength and ductility of the alloy are explored at various aging temperatures. The study finds that the achievable yield strength and tensile elongation of the alloy aged at 500 degrees Celsius are 1430 MPa and 9.5%, respectively. The strength of the bimodal alloy aged at 620 degrees Celsius first increases with aging time, reaches a maximum value of 1079 MPa after 2 hours, and then remains constant. Surprisingly, the tensile elongation of the bimodal alloys aged at 620 degrees Celsius is the same as that of the solution-treated alloy. Aging at 700 degrees Celsius does not have a strengthening effect but improves the alloy's ductility. The precipitation kinetics of grain boundary alpha (α(GB)) precipitation is more active than that of intragranular alpha (α(Intra)) precipitation within the aging temperature range of 500 degrees Celsius to 700 degrees Celsius. However, α(GB) precipitation does not contribute to strengthening the alloy. The yield strength of the bimodal Ti-5553 alloy depends on the dislocation density of the beta phase and the size effects of the prior beta grains. The ductility of the alloy is influenced by the plasticity of α(GB) and the stress concentration at the beta/α(Intra) interface. The combination of strength and ductility in the high-strength bimodal Ti-5553 alloy can be further improved by optimizing the thickness of α(GB).
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Xuebing Hua, Kun Wang, Xian Tong, Jixing Lin
Summary: Zn-1Mg-xZr alloys with different Zr contents were prepared and hot-rolled, and their microstructures, mechanical properties, and corrosion behaviors were systematically assessed. The results showed that the addition of Zr initially increased and subsequently decreased the mechanical strength of the alloys. The Zn-1Mg-0.05Zr alloy exhibited higher mechanical properties and an appropriate corrosion rate for biomedical applications.
Article
Materials Science, Multidisciplinary
Liu Yang, Xiaosong Jiang, Hongliang Sun, Zhenyi Shao, Yongjian Fang, Rui Shu
Summary: The addition of Y elements can significantly reduce the grain size of Cu-11Al-3Ni-2.5Mn alloy and form Y2O3 particles, increasing the tensile strength of the alloy. With a Y content of 1 wt.%, the alloy also exhibits high damping properties, making it promising for potential applications.
Article
Materials Science, Multidisciplinary
Shiyan Zhu, Chengpeng Zhu, Deng Luo, Xiaoyong Zhang, Kechao Zhou
Summary: A new low-density, high-strength alloy was developed in this study, which exhibited outstanding mechanical properties and low density after hot-rolling and heat treatment. The alloy's microstructure consisted of spherical α(p) phase, acicular α(s) phase, and a small amount of β phase. After heat treatment, the alloy still maintained similar strength and ductility. The high ductility of the alloy was attributed to numerous dislocation slippages and deformation twinning in the α(p) phase, while the acicular α(s) phase provided the alloy with high strength after heat treatment.
