Article
Materials Science, Ceramics
H. Besharatloo, M. de Nicolas-Morillas, M. Chen, A. Mateo, B. Ferrari, E. Gordo, E. Jimenez-Pique, J. M. Wheeler, L. Llanes
Summary: The influence of microstructure and processing route on the mechanical response, deformation, and failure mechanisms of Ti(C,N)-FeNi cermets were investigated by compressing micropillars milled by focused ion beam. Stress-strain curves and deformation mechanisms were observed using scanning electron microscopy. The appropriate micro-pillar size was determined based on the microstructural characteristics to overcome scale effect issues. The results showed a direct relationship between yield strength and ceramic/metal ratio for colloidal samples, and deformation of metallic binder and glide between Ti(C,N)/Ti(C,N) particles were dominant mechanisms during compression.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Youchuan Mao, Xianghong Liu, Yu Wang, Hongchao Kou, Haoyan Hu, Haisheng Chen, Kaixuan Wang, Yuxuan Du
Summary: This paper investigates the hot deformation behavior, microstructural evolution, and texture evolution of a new solution-treated titanium alloy. The constitutive equation of the alloy is obtained through compression tests, and the flow stress is accurately predicted. The study finds both discontinuous and continuous dynamic recrystallization in the microstructures of the deformed alloys, with deformation temperature and strain rate playing significant roles. Plastic deformation and dynamic recrystallization comprehensively influence the texture evolution of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yongdi Wang, Pengfei Gao, Hongwei Li, Yanxi Li, Mei Zhan
Summary: This study investigates the microstructural evolution and mechanical behavior of the GH3128 alloy during hot deformation. The results show that the precipitation of the second phase in the grain boundary increases with temperature, and dynamic recrystallization occurs through twin-induced and particle-stimulated nucleation. The mechanical behavior varies with temperature, with a decrease in elongation and a change in fracture mechanism from ductile to ductile brittle fracture at higher temperatures. These findings provide a theoretical basis and guidance for the hot-working process of GH3128.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Alireza Dareh Baghi, Shahrooz Nafisi, Heike Ebendorff-Heidepriem, Reza Ghomashchi
Summary: A detailed study comparing the microstructural differences between Ti-6Al-4V parts fabricated via conventional powder metallurgy and laser powder bed fusion routes revealed that L-PBF parts have a higher microhardness with a single phase of martensitic alpha '. On the other hand, parts sintered via powder metallurgy showed two phases with lower microhardness. The rapid cooling of the beta phase had no effect on the hardening of the bulk martensitic hcp alpha ' in L-PBF parts.
Article
Engineering, Manufacturing
Pin Yang, Kyle L. Johnson, Jay D. Carroll, Jessica L. Buckner, Mia A. Blea-Kirby, Catherine Groves, Eric N. Coker
Summary: This study measured the thermophysical properties of additively manufactured and heat-treated Ti-5553 alloy, and compared them to microstructural features. The results indicate that processing and heat treatment variations have little impact on the thermal conductivity of the alloy, presumably due to its heavy alloying effect.
ADDITIVE MANUFACTURING
(2023)
Article
Chemistry, Physical
Miao Qi, Cunguang Chen, Jiashu Wei, Xingyuan Mei, Chunfang Sun, Guoping Su, Chenzeng Zhang, Mengjie Yan, Fang Yang, Zhimeng Guo
Summary: This paper systematically investigates the microstructural evolution, precipitation behavior and mechanical properties of 2195 Al-Li alloys prepared by powder metallurgy combined with hot extrusion. The results show that the deformation of PM 2195 Al-Li alloys during hot extrusion is dominated by the coupling of dynamic recovery with continuous dynamic recrystallization. The T6-treated sample exhibits a perfect combination of strength and ductility, with ultimate tensile strength of 662 MPa, yield strength of 617 MPa and uniform elongation of 6.6%. The precipitation strengthening of T1 phase is the dominant mechanism for the strengthening of heat-treated alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Aditya Sarkar, S. V. S. Narayana Murty, M. J. N. V. Prasad
Summary: Uniaxial and plane strain compression tests were conducted on Cu-Cr-Zr-Ti alloy specimens to examine the influence of deformation mode on stress-strain response, work hardening behavior, and microstructural evolution. The results showed that the alloy exhibited a transition from recovery stage to steady state under uniaxial compression, while a smooth transition was observed under plane strain compression. Additionally, the microstructures evolved differently under the two compression modes.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
R. Vignesh Kumar, R. Harichandran, U. Vignesh, M. Thangavel, S. B. Chandrasekhar
Summary: The experimental work focused on determining the strain hardening behavior of Graphene Nano Platelets (GNPs) dispersed aluminum composites during cold upsetting, with a particular emphasis on the effects of hot extrusion and GNPs content. Results showed significant variations in tri-axial stresses, instantaneous strain hardening exponent, and strength coefficient based on different weight percentages of GNPs and extrusion processes. Notably, aluminum composites with 1.5 wt% GNPs after extrusion exhibited a significant influence on both strain hardening exponent and strength coefficient.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Automation & Control Systems
Dineo Mosoma, Desmond Klenam, Takunda Maunganidze, Michael Bodunrin
Summary: This study investigated the hot workability of an experimental, non-toxic, low-cost Ti-3.4Fe alloy using flow stress analysis, constitutive modeling, processing maps, and microstructural examination. The results showed that the optimum conditions to deform Ti-3.4Fe were 850 degrees C at a strain rate of 0.1 s(-1) for both steady-state and peak stresses. The microstructure revealed different characteristics at different conditions, indicating the dominance of dynamic recovery as the softening mechanism in the safe region and the occurrence of instabilities in other conditions.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
M. Jia, Y. Alshammari, F. Yang, L. Bolzoni
Summary: TiB-reinforced Ti???6Al???4V composites with different B content were manufactured via flashless hot forging and the effects of solution plus aging heat treatments were studied. It was found that flashless hot forging can achieve fully dense materials, and the addition of B can significantly enhance the strengthening effect. The subsequent solution plus aging heat treatments can improve the mechanical properties and microstructure of the materials.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Byungmin Ahn
Summary: Ti-6Al-4V alloy was prepared using selective laser melting (SLM) method and subjected to heat treatment in this study. The results showed that heat treated samples exhibited a reduction in defects, a change in morphology of the alpha'-martensite, a significant decrease in strength, but an improvement in elongation. An optimal combination of strength and elongation was found at 900°C.
Article
Engineering, Multidisciplinary
Dong-yang Qin, Ying-gang Miao, Yu-long Li
Summary: The influence of initial microstructures on the adiabatic shear behavior of Ti-5553 alloy was investigated using experimental methods. It was found that the lamellar alloy tended to form adiabatic shearing band (ASB), while the bimodal alloy was ASB-resistant. The microstructure of ASB changed dramatically compared to the initial microstructure of the alloy.
DEFENCE TECHNOLOGY
(2022)
Article
Crystallography
Tomoyuki Homma, Takashi Washizu
Summary: The beta-type and sintered Ti-3.6Fe-5Zr-0.2B alloy was consolidated using spark plasma sintering and followed by a beta solution treatment. Modification of sintering conditions improved the tensile ductility by achieving 100% relative density. Water quenching resulted in the formation of alpha martensite phases, while air cooling suppressed their formation and instead precipitated bimodal alpha lath phases, resulting in higher strength and better ductility.
Article
Materials Science, Multidisciplinary
Qi Wang, Guo-qing Chen, Huaping Tang, Xue-song Fu, Wen-long Zhou
Summary: TiAl-based alloys are promising materials for high-temperature applications. By utilizing elemental powder metallurgy (EPM) to obtain a significant volume fraction of beta phase in the alloy and eliminating the beta/B2 phase through subsequent heat treatment, the hot workability and service performance of the Ti-46Al-4Nb-0.1B alloy can be enhanced. The existence of beta phase can effectively improve the deformability of the TiAl alloy.
ADVANCED ENGINEERING MATERIALS
(2021)
Review
Materials Science, Multidisciplinary
Tianli Zhao, Bing Zhang, Zhijuan Zhang, Le Chen, Yi Xu, Jun Cai, Kuaishe Wang
Summary: Pure Ti, as a component layer of layered composites, exhibits excellent properties such as high specific strength, low density, low elastic modulus, high-temperature corrosion resistance, and excellent biocompatibility. It shows good flow behavior and recrystallization characteristics during hot deformation studies.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Xiongxiong Gao, Weidong Zeng, Haoyuan Ma, Dadi Zhou, Qinyang Zhao, Qingjiang Wang
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Engineering, Biomedical
Y. Alshammari, F. Yang, L. Bolzoni
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Q. Y. Zhao, F. Yang, R. Torrens, L. Bolzoni
MATERIALS CHARACTERIZATION
(2019)
Article
Nanoscience & Nanotechnology
Qinyang Zhao, Fei Yang, Rob Torrens, Leandro Bolzoni
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Chemistry, Physical
Qinyang Zhao, Fei Yang, Rob Torrens, Leandro Bolzoni
Article
Chemistry, Physical
S. Z. Zhang, J. W. Liu, Q. Y. Zhao, C. J. Zhang, L. Bolzoni, F. Yang
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Materials Science, Multidisciplinary
Qinyang Zhao, Yongnan Chen, Yiku Xu, Rob Torrens, Leandro Bolzoni, Fei Yang
Summary: A short-time processing route has been designed to manufacture cost-affordable and high-quality powder metallurgy (PM) metastable beta titanium alloy, achieving homogeneous macrostructure and fine-grain microstructure. The alloy demonstrates synergistic strength-ductility combinations after specific processing and heat treatment, with comparable or even better performance than other alloys prepared by traditional methods.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Qinyang Zhao, Leandro Bolzoni, Yongnan Chen, Yiku Xu, Rob Torrens, Fei Yang
Summary: This study comprehensively investigates the microstructure evolution, texture variation, and deformation process of powder metallurgy Ti-5553 alloy under different processing parameters. It reveals the influential role of processing parameters on the deformation process and resultant microstructure, as well as the various evolution mechanisms for the beta and alpha phases.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Yutao Zhai, Ajit Pal Singh, Leandro Bolzoni, Yingdong Qu, Yiming Li, Fei Yang
Summary: The addition of boron powder enhances the mechanical properties of the composite, with 1% and 3% boron content showing the best tensile performance.
Article
Materials Science, Multidisciplinary
Qinyang Zhao, Fei Yang, Rob Torrens, Leandro Bolzoni
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Qinyang Zhao, Fei Yang, Rob Torrens, Leandro Bolzoni
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2019)
