Article
Chemistry, Physical
Qinghua Tian, Hanning Liu, Xueyi Guo, Zhaowang Dong
Summary: This investigation utilized an economical hydrogen sintering technique to fabricate a Ti-10 V-2Fe-3Al aerospace alloy. The results showed that hydrogen sintering can produce an ultrafine-grained microstructure and enhance the mechanical properties of the alloy, exhibiting a microstructure comparable to that of forged alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Manufacturing
S. A. Mantri, M. S. K. K. Y. Nartu, S. Dasari, A. Sharma, P. Agrawal, R. Salloom, F. Sun, E. Ivanov, K. Cho, B. McWilliams, S. G. Srinivasan, N. B. Dahotre, F. Prima, R. Banerjee
Summary: The study found that the LPBF processed Ti-10V-2Fe-3Al alloy lacked ductility and strain hardenability due to the formation of isothermal omega precipitates during fabrication, but after a beta-solution heat treatment, the TRIP/TWIP effects were reactivated, leading to substantial recovery of tensile ductility and very high strain hardening rate. This high strain hardening rate is believed to be a result of rapid strain-induced transformation from beta to alpha during plastic deformation, coupled with hierarchical twinning within the martensite plates.
ADDITIVE MANUFACTURING
(2021)
Article
Chemistry, Physical
Xueli Wang, Fuguo Li, Tianyu Xu, Xinkai Ma, Botong Hou, Liang Luo, Bang Liu
Summary: The microstructure and microhardness of Ti-1023 alloy were systematically studied under different deformation modes, showing significant changes in alpha '' martensite transformation, grain refinement, and accumulation of dislocations. The simultaneous tension-torsion deformation mode was found to be more conducive to these effects, leading to an increase in microhardness.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Abhishek Rastogi, Rajdeep Sarkar, Suresh Neelakantan
Summary: Martensitic transitions in Ti-1023 alloy as a function of cold rolling strain levels (5-43%) have been investigated. Different phases such as ω and α' have been confirmed from the β phase through XRD, TEM, and EBSD techniques. The presence of ω phase is confirmed in the 5% cold rolling sample, which acts as preferential nucleating sites for α' martensite formation. Additional deformation processes such as martensite compound twinning and strain-induced α'→α' martensitic transformation are also observed. With further increase in cold rolling strains to 43%, the transformation of β→α' and strain-induced α'→α' martensites are pronounced. The study suggests that Ti-1023 alloy exhibits high cold deformability up to -43%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Jing Wang, Gang Chen, Wei Chen, Lei Qi, Jie Zheng, Changhai Xie, Qiang Chen
Summary: The morphology of alpha phase greatly affects the deformation and flow softening behavior of near-beta titanium alloys. The study found that lamellar microstructure showed higher peak stresses and more intense flow softening compared to equiaxed microstructure. Constitutive analysis suggests that the softening mechanism for beta matrix is dominated by continuous dynamic recrystallization and can be enhanced by alpha phase particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Jing Wang, Gang Chen, Wei Chen, Lei Qi, Jie Zheng, Changhai Xie, Qiang Chen
Summary: The morphology of the alpha phase has a significant impact on the deformation and flow softening of near-beta titanium alloys. The study found that lamellar microstructure exhibits higher peak stresses and more intense flow softening compared to equiaxed microstructure. The main softening mechanism is attributed to the loss of Hall-Petch strengthening caused by lamellar rotation and kinking.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
S. A. Mantri, S. Dasari, A. Sharma, Y. Zheng, H. L. Fraser, R. Banerjee
Summary: The formation and influence of isothermal phase precipitates in a metastable beta-titanium alloy, Ti-10V-2Fe-3Al, is investigated. It is found that the rejection of Al from the growing isothermal precipitates aids in their formation. The presence of alpha/omega and alpha/beta interfaces confirms that the alpha precipitates form at the beta/omega interface. Subsequent annealing at a higher temperature dissolves the precipitates and re-establishes the two-phase beta+alpha equilibrium.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
J. F. Xiao, X. K. Shang, J. Q. Zhang, Y. Lia, B. Wen, Q. W. Guana, B. B. He
Summary: This study investigated the small-scale deformation of metastable beta Ti alloy using nanoindentation combined with transmission electron microscope observation. Different martensitic variants were detected under the complex strain/stress field given by the indenter in a single titanium crystal. This result was well explained by the Schmid factor and interaction work criterion, with the assistance of finite element simulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Tong Wang, Ping Yang, Jin Zhang, Xin-Fu Gu
Summary: The microstructure evolution of the twin of TB6 alloy under planar wave detonation was investigated. It was found that twin deformation occurs only in the α phase, and there is a clear phenomenon of twin variant selection.
Article
Engineering, Mechanical
Calvin S. Samuel, Yash Chodancar, Smit Kanther, M. Arivarasu, T. Ram Prabhu
Summary: The study investigates the microstructure, high-temperature tribological performance, and mechanical properties of solution-aged Ti-10V-2Fe-3Al. The results show that wear mechanisms vary at different temperature conditions, with oxidation and delamination becoming dominant wear mechanisms at higher temperatures.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Nanoscience & Nanotechnology
Xinkai Ma, Zhuo Chen, Lei Xiao, Shifeng Luo, Wenjie Lu
Summary: In this study, the compressive deformation behavior of a beta solution treated Ti-1023 alloy was analyzed at room temperature. The results revealed that stress-induced martensitic transformation dominated the compressive deformation process, with different strain rates leading to varying work hardening rates and triggering stresses. Additionally, novel deformation mechanisms of alpha '' martensite, such as {111}(α'') twinning and kinking structure, were observed during the compression deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Xueli Wang, Fuguo Li, Tianyu Xu, Shitong Ma, Cheng Da, Minghe Wang
Summary: The mechanical behavior and microstructural evolution of Ti-10V-2Fe-3Al alloy were investigated during cyclic deformation at ambient temperature. The main deformation product is stress-induced martensite transformation (SIMT). With increasing cycles, the trigger stress of SIMT decreases and the volume fraction of SIMT increases until nearly complete alpha '' martensite microstructure. Deformation-induced martensite twins (DIMT) were also observed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Frank Niessen, Azdiar A. Gazder, David R. G. Mitchell, Elena V. Pereloma
Summary: Microstructure evolution during the 3-point bending of a metastable beta Ti-10V-2Fe-3Al alloy containing 5% alpha was dominated by the formation of deformation-induced alpha '' martensite. The nucleation of alpha '' plates from {580}(alpha '') habit planes at alpha-beta interfaces, impingement with high-angle boundaries, and subsequent thickening led to a build-up of strain energy inducing {130} < 310 >(alpha '') twinning. The study also revealed the activation of {130}< 310 >(alpha '') twinning by alpha '' impingement in a metastable beta matrix.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
B. Ellyson, A. Saville, K. Fezzaa, T. Sun, N. Parab, C. Finfrock, C. J. Rietema, D. Smith, J. Copley, C. Johnson, C. G. Becker, J. Klemm-Toole, C. Kirk, N. Kedir, J. Gao, W. Chen, K. D. Clarke, A. J. Clarke
Summary: Aged TRIP Ti-10V-2Fe-3Al alloy exhibits higher elongations and flow stresses as the strain rate increases, due to tuning of phase stability and microstructural characteristics. However, increasing aging time and/or strain rate reduces the overall propensity for the TRIP effect and extent of transformation. TRIP with omega phase precipitation provides interesting design strategies for engineering applications requiring high strains and energy absorption.
Article
Engineering, Aerospace
Xu Dai, Chen Wen, Liang Wu, Lei Liu, Yulong Wu, Xingxing Ding, Jiahao Wu, Wenjun Ci, Aitao Tang, Fusheng Pan
Summary: In this study, a thick composite anodic oxide film was fabricated on Ti-10V-2Fe-3Al alloys using environmentally friendly malic acid electrolyte containing PTFE nanoparticles. The research investigated the influence of pulse frequency on the morphology and microstructure of the film, revealing the optimal conditions for wear resistance and corrosion properties. The results suggest that the combination of PTFE nanoparticles and malic acid electrolyte can significantly affect the energy fluctuation of electrochemical equilibrium and film formation process.
CHINESE JOURNAL OF AERONAUTICS
(2021)
