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Article
Nanoscience & Nanotechnology
Zhiyuan Jia et al.
Summary: The mechanical properties, microstructure evolution mechanism, texture variation process, and deformation mechanism of a near-alpha CT20 titanium alloy with different hot and cold rolling reductions were thoroughly investigated. It was found that the increase in rolling reduction led to a gradual increase in tensile strength and decrease in ductility. The mechanical properties were better along the rolling direction (RD) than the transverse direction (TD), which was attributed to the increase in grain boundary and dislocation density. The work-hardening rates and mechanical properties were influenced by the preferred orientation of alpha phase and the slip distances of dislocation during deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Engineering, Industrial
Hucheng Guo et al.
Summary: Electromigration-enhanced Kirkendall effect was observed in Cu/Ti diffusion welding by sparking plasma sintering. The study investigated the microstructural evolution and mechanical properties of Cu/Ti joints to understand the effect of electromigration-enhanced Kirkendall effect on diffusion joining mechanism. Four types of Cu-Ti intermetallic compounds were formed at the bonded joint interface: CuTi2, CuTi, Cu3Ti2, and beta-Cu4Ti. At lower welding temperatures, Cu atomic diffusion was enhanced by current, resulting in Kirkendall Voids and weak joint strength. However, at a higher temperature of 833 K, a continuous CuTi2 Kirkendall plane was formed and the growth of the brittle CuTi phase was impeded, leading to high strength joints.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
DeShui Yu et al.
Summary: In this study, the connection between stainless steel and titanium alloy was successfully achieved by using AgCuTi filler metal to avoid the formation of brittle Ti-Fe intermetallic compounds. The filler metal diffused and bonded with the base metals on both sides, forming a good connection. No Ti-Fe intermetallic compounds were found in the joint, and Ti2Cu and AgTi2 intermetallic compounds with better ductility were formed at the filler-TC4 interface.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Guantong Wei et al.
Summary: The effects of adding (Pr0.25Nd0.75)10Dy80Cu5Al5 alloy powders on the magnetic properties and microstructure of hot-deformed Nd-Fe-B magnets were investigated. The addition of (Pr0.25Nd0.75)10Dy80Cu5Al5 resulted in an ultrahigh coercivity of 3.14 T in a 6-mm-thick hot-deformed magnet, and improved the temperature coefficient of coercivity and remanence at 20-180℃, indicating excellent thermal stability. Microstructure observations showed that the addition of (Pr0.25Nd0.75)10Dy80Cu5Al5 led to the formation of thick nonferromagnetic intergranular phase, reduced grain size and aspect ratio, and the formation of the (Nd,Pr,Dy)2Fe14B main phase, which were the main reasons for the enhancement of coercivity and thermal stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Thermodynamics
Shihang Zhou et al.
Summary: Diffusion behaviors in bcc Ti-V-Fe ternary alloys at 1273 K and 1473 K have been studied. The composition-distance profiles were extracted from Electron Probe MicroAnalysis (EPMA) and represented by the ERror Function EXpansion (ERFEX). The inter-diffusion coefficients and impurity diffusion coefficients were extracted using the Whittle-Green and generalized Hall methods. The atomic mobility parameters for diffusion were assessed for the first time by reproducing the extracted diffusion coefficients, and the accuracy of this work was confirmed by successfully reproducing the composition-distance profiles and diffusion paths.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Wei Zhong et al.
Summary: This study extends a 1-parameter Z-Z-Z binary diffusion coefficient model to ternary and multicomponent systems, and finds that impressive predictions of ternary diffusion coefficients can be achieved by a simple combination of binary model parameters or using independent cross-binary fitting parameters, thereby improving the robustness of the data.
SCRIPTA MATERIALIA
(2022)
Article
Thermodynamics
Weimin Bai et al.
Summary: Studying the diffusion behavior in 13 Ti-Mo-Ta alloy is significant for understanding the microstructure evolution in production process and developing new alloys. In this study, interdiffusion coefficients and atomic mobilities in bcc phase were obtained through experiments and calculations, confirming the accuracy of the database.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2022)
Article
Thermodynamics
Ning Gao et al.
Summary: In this study, we investigated the ternary diffusion behaviors of BCC Ti-rich Ti-V-Cr alloys at different temperatures using the diffusion couple technique. By extracting the inter-diffusion coefficients and impurity diffusion coefficients, and then evaluating the ternary diffusion coefficients and optimizing the atomic mobility parameters, we were able to simulate and accurately predict the composition profiles and diffusion paths of the Ti-V-Cr ternary alloy system.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
L. Lavisse et al.
Summary: The role of ultrasonic shot-peening and laser-shock peening on the insertion of atmospheric nitrogen during high temperature oxidation of pure titanium and the improvement of its oxidation resistance is reported. It is found that only the LSP treatment can form a stable nitrogen-rich layer, acting as a barrier for oxygen diffusion.
Article
Materials Science, Multidisciplinary
Zi-Kui Liu
Summary: Through the flux equations based on the combined law of thermodynamics, a theory of cross phenomena has been developed and applied to various fields. It is found that the coefficient matrix of cross phenomena exhibits a diagonal structure when the driving forces are chosen appropriately.
MATERIALS RESEARCH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Lu Li et al.
Summary: This study investigated the flow behavior and instability prediction of the TA10 titanium alloy during isothermal compression, revealing flow softening mechanisms and instability criteria under different deformation temperatures. Suitable processing parameters were proposed based on microstructural analysis and flow stress-strain curves.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
L. Bolzoni et al.
Summary: Reducing the manufacturing cost of titanium and developing new alloys are crucial for maximizing the benefits of titanium in industrial applications. The addition of isomorphous and eutectoid beta stabilizers has a significant effect on the manufacturability and mechanical response of titanium. However, it also affects the material's strength, hardness, and toughness to various degrees.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Feilong Yu et al.
Summary: In this study, the trade-off between strength and toughness in titanium alloys was overcome by cryorolling and short-period vacuum annealing of Ti-6Al-4V alloy. After annealing, the alloy exhibited significantly improved yield strength, ultimate tensile strength, and elongation, as well as the highest reported static toughness among rolled titanium alloys. The coarsening of grains was inhibited, and the shear band structure was weakened, leading to enhanced toughness. This study is of great importance for the manufacturing of high strength and toughness Ti-6Al-4V alloys and other types of titanium alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Xiaotong Pang et al.
Summary: The addition of ZrB2 through laser melting deposition can refine the prior-beta grains in the TC4 titanium alloy, resulting in a fine basket-weave structure. The mechanical anisotropy of the modified-TC4 alloys decreases with the increase of ZrB2 content. The alloy with 0.5 wt% ZrB2 addition shows an excellent combination of strength and ductility, with isotropic characteristics.
Article
Multidisciplinary Sciences
Chongle Zhang et al.
Summary: While grain boundary engineering has limitations, chemical boundary engineering enables the creation of metallic materials with ultrafine heterogenous microstructures, enhancing mechanical properties.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Jianxiong Li et al.
Summary: The effect of a niobium interlayer on weld strength and thermal stability in solid-state welding of stainless steel and titanium alloy was evaluated. The interlayer was found to increase toughness of the welds. Thermal exposure decreased the strength and toughness of the welds, but the interlayer improved properties up to 700 degrees Celsius.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Thermodynamics
Weimin Bai et al.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2019)
Article
Materials Science, Multidisciplinary
X. T. Yan et al.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2019)
Article
Thermodynamics
Junyi Tan et al.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2019)
Article
Thermodynamics
Biao Hu et al.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2016)
Article
Metallurgy & Metallurgical Engineering
Zhu Xiao-shuo et al.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2016)
Article
Materials Science, Multidisciplinary
Dipankar Banerjee et al.
Article
Thermodynamics
Weibang Li et al.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2011)
Article
Metallurgy & Metallurgical Engineering
Liu Jian-hua et al.
JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY
(2011)
Article
Chemistry, Physical
Yajun Liu et al.
JOURNAL OF ALLOYS AND COMPOUNDS
(2009)
Article
Metallurgy & Metallurgical Engineering
Feng Qi-ming et al.
JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY
(2009)
Article
Chemistry, Physical
Yajun Liu et al.
JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION
(2009)
Article
Physics, Applied
A. G. Nikitin et al.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2009)
Article
Metallurgy & Metallurgical Engineering
Y Liu et al.
JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY
(2003)
Review
Chemistry, Physical
G Ghosh
JOURNAL OF PHASE EQUILIBRIA
(2002)
Article
Thermodynamics
JO Andersson et al.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2002)
Article
Chemistry, Physical
JY Lee et al.
JOURNAL OF ALLOYS AND COMPOUNDS
(2000)
