Article
Materials Science, Multidisciplinary
Qisheng Feng, Baohua Duan, Lina Jiao, Guangyao Chen, Xingli Zou, Xionggang Lu, Chonghe Li
Summary: Based on thermodynamic database, a new alpha + beta titanium alloy with improved performance, Ti-4.5Al-10.5V-3Fe, was developed by combining CALPHAD and Mo equivalent method. The microstructure analysis confirmed the expected composition of alpha and beta phases in both rolled and heat treatment states. Tensile testing showed that Ti-4.5Al-10.5V-3Fe alloy achieved higher tensile strength and elongation compared to Ti-1023 alloy. Further research is needed to fully understand and explore the potential applications of this alloy.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Ning Tian, Xiaoyun Song, Wenjun Ye, Songxiao Hui
Summary: The deformation mechanisms of a beta-rich alpha+beta titanium alloy were studied through superplastic tensile tests at different temperatures and strain rates. The alloy exhibited excellent superplasticity at 760 degrees C and 1 x 10(-3) s(-1), with a high fracture elongation and strain rate sensitivity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Zhenguo Guo, Tiejun Ma, Xiawei Yang, Jun Tao, Ju Li, Wenya Li, Achilles Vairis
Summary: This research investigated the tensile deformation behavior and fracture mechanism of a linear friction welded dissimilar Ti17 (α+β)/Ti17 (β) titanium alloy joint. Experimental techniques such as in-situ tensile tests under scanning electron microscopy and microstructural characterizations using electron backscatter diffraction technique and transmission electron microscopy were utilized. The dominant deformation behavior during tensile loading was found to be dislocation slip, which primarily occurred in the metastable β matrix and was impeded by the α phase. Crack initiation was observed in the Ti17 (β) side thermo-mechanically affected zone (TMAZ-β), resulting from microvoid coalescence and propagated along the slip line until fracture.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Yu Zhang, Renlong Xin, Ke Wang, Qing Liu
Summary: This study delves into the orientation preference of the product phase during the beta to alpha phase transformation, revealing the importance of general rules and special cases regarding variant selection.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Sang Won Lee, Jae Hyeok Kim, Chan Hee Park, Jae-Keun Hong, Jong-Taek Yeom
Summary: A new alloy design of metastable alpha+beta-Ti alloy with a mix of high yield strength alpha phase and low elastic modulus metastable beta phase has been proposed in this study, achieving an excellent combination of strength and ductility with a high elastic admissible strain. Heat treatment in the alpha+beta regime is an effective method for grain refinement, resulting in high strength without increasing the elastic modulus.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Lei Lei, Qinyang Zhao, Cong Wu, Yongqing Zhao, Shixing Huang, Weiju Jia, Weidong Zeng
Summary: The study investigated the effect of cooling rates on variant selection, coarsening behavior of alpha phase, and microstructure evolution in alpha+ beta TC21 alloy. Different microstructure characteristics were observed under air cooling and furnace cooling conditions, leading to variations in tensile properties of the alloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Xiongxiong Gao, Saifei Zhang, Lei Wang, Kun Yang, Peng Wang, Hongyuan Chen
Summary: Alpha colonies in a titanium alloy tend to develop in adjacent beta grains that maintain a certain orientation relationship with the grain boundary alpha, while dendritic alpha tends to grow in the other adjacent beta grains. The crystallographic orientation of alpha colonies developing into two adjacent beta grains from grain boundary alpha remains the same when grain boundary alpha maintains a near Burgers orientation relationship with both adjacent beta grains in a specific prior beta/beta boundary. These observations are explained in terms of minimum interfacial energy and strain energy.
Article
Materials Science, Multidisciplinary
Hyeon Jin Lee, Jae Hyuk Kim, Chan Hee Park, Jae-Keun Hong, Jong-Taek Yeom, Taekyung Lee, Sang Won Lee
Summary: The deformation mechanisms of an alpha ''-martensitic Ti-8Mo alloy were investigated using ex-situ electron microscopy tensile tests. It was found that two deformation twins, {110}(11 over bar 0)alpha '' and {130}(3 over bar 10)alpha '' are simultaneously generated through two pathways: (1) direct from primary laths and (2) via reorientation twins. The generation of deformation twinning is strongly influenced by crystal orientation and follows Schmid's law. The dominant twinning in alpha '' martensite was determined by comparing the shuffle magnitudes calculated from the lattice parameter and the magnitude of lattice modulation. {110}(11 over bar 0)alpha '' and {130}(3 over bar 10)alpha '' twins are activated simultaneously in Ti alloys with a low beta-stabilizer content, such as Ti-8Mo alloy.
Article
Chemistry, Physical
Masaki Tahara, Kazuya Hasunuma, Hideki Hosoda
Summary: This study investigated the decomposition process of the isothermal alpha '' phase in beta-Ti alloys, and found that the resulting alpha + beta dual phase inherited the microstructural characteristics of the alpha ''(iso) phase. The research results indicate the existence of a strict variant selection rule between the decomposed alpha and beta phases, with a specific variant combination observed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Yang Xiang, Wei Xiang, Wuhua Yuan
Summary: Analyzing the microstructure of Ti-55531 alloy under different deformation conditions during hot compression in the alpha + beta phase region, it was found that the flow softening phenomenon is influenced by a combination of mechanisms. Deformation heat causes significant flow softening at a strain rate of 1 s-1, while dynamic recrystallization has little contribution. With increasing deformation temperature and strain rate, the flow softening fraction f V decreases due to the shift in alpha p phase volume fraction, from 16.6% at 760°C and 0.001 s-1 to 1.4% at 840°C and 1 s-1. The flow softening fraction f SF is 3.95% at 790°C and 5.34% at 820°C as a result of texture evolution. (c) 2023 Elsevier B.V. All rights reserved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yachong Zhou, Xiaofeng Xu, Yang Zhao, Xudong Yan, Lai Wei, Zhicheng Wu, Yongqiang Yu
Summary: Fine grain strengthening is crucial for improving mechanical properties in titanium alloys. In this study, electroshock treatment was found to directly recrystallize coarse prior beta grains in alpha+beta titanium alloy, leading to enhanced tensile strength and elongation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Diksha Mahadule, Rajesh K. Khatirkar, Saurabh K. Gupta, Aman Gupta, Tushar R. Dandekar
Summary: The study investigated the effect of heat treatment on the microstructure and corrosion behavior of a high Mo containing titanium alloy. Different microstructures were observed depending on the heating temperature and cooling conditions. Heat-treated samples showed improved corrosion resistance, attributed to the presence of stable TiO2 film on the corroded surfaces. Samples treated at 950 degrees Celsius exhibited the best corrosion resistance overall.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Manufacturing
Fang Cheng, Huaming Wang, Zhuo Li, Xu Cheng, Dongdong Zheng, Shuquan Zhang, Xu Hu, Hao Zhang, Min Liu
Summary: This research systematically investigates the dynamic compressive deformation mechanisms and microstructure evolution of LDED TC11 titanium alloy under high strain rates. The results indicate that the basket-weave morphology of TC11 alloy exhibits excellent performance in terms of dynamic flow stress, plastic strain, and impact absorption energy under dynamic loading.
ADDITIVE MANUFACTURING
(2023)
Article
Nanoscience & Nanotechnology
Kai Chen, Qunbo Fan, Lin Yang, Shun Xu, Jiahao Yao, Yu Gao, Wei Lei
Summary: A novel metastable beta-type Ti-6Mo-3.5Cr-1Zr alloy is designed using d-electrons theory to introduce diverse phase transformations. Stress-induced omega (SI omega) phase transformation dominates the initial deformation, while the SI omega bands are transformed to alpha+beta phase as the strain increases. The sequential mechanism associated with beta -> SI omega ->alpha+beta is first reported in titanium alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Crystallography
Haoyu Zhang, Shuo Zhang, Shuai Zhang, Xuejia Liu, Xiaoxi Wu, Siqian Zhang, Ge Zhou
Summary: This study investigated the high-temperature deformation behavior of the near-beta titanium alloy Ti-3Al-6Cr-5V-5Mo and obtained constitutive models and processing maps. The experimental results showed that the alloy had the maximum number of dynamic recrystallization grains and the minimum average grain size at 790 degrees C/0.001 s(-1) condition.
Article
Materials Science, Multidisciplinary
Min Zheng, Lei Wei, Jing Chen, Qiang Zhang, Guohao Zhang, Xin Lin, Weidong Huang
Summary: This study investigated the development of surface features of Inconel 718 samples fabricated by selective laser melting under different laser powers and scanning speeds. The surface tension was identified as a key factor in the SLM process, pulling melted powder into the molten pool and affecting surface morphology.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Shan Liang, Jinghui Li, Qiang Zhang, Jing Chen
Summary: This paper investigates the microstructure evolution of TC17 titanium alloy prepared by laser stereo forming (LSF). The microstructure in deposited TC17 titanium alloy is significantly affected by the thermal cycle history during the LSF process. The metastable beta phase gradually evolves into alpha + beta phases due to thermal cycle during multi-layer deposition.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Optics
Jianbo Jin, Shengfeng Zhou, Yu Zhao, Qiang Zhang, Xiaojian Wang, Wei Li, Dongchu Chen, Lai-Chang Zhang
Summary: The study investigated the effect of TiB2 content on the microstructure and wear resistance of titanium matrix composites fabricated by selective laser melting. It was found that increasing TiB2 content refined the microstructure and improved the wear resistance by inducing strengthening and hardening effects. Additionally, the in-situ reaction of TiB2 with Ti matrix during SLM resulted in the formation of TiB and refinement of Ti matrix, leading to enhanced properties of the composites.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Yongchao Ou, Qiang Zhang, Yunyun Wei, Yunlong Hu, Shang Sui, Jing Chen, Xiaojian Wang, Wei Li
Summary: The study demonstrates that different scanning strategies in selective laser melted AlSi10Mg alloy can result in varied grain morphologies and microstructure, which in turn affect the tensile properties. Mechanical properties show significant differences between the horizontal and vertical directions, mainly influenced by the distribution of pores and MPBs.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Engineering, Multidisciplinary
Shang Sui, Zuo Li, Chongliang Zhong, Qiang Zhang, Andres Gasser, Jing Chen, Youxiang Chew, Guijun Bi
Summary: Improvement in high temperature material properties of aerospace alloys, such as IN718, is crucial for enhancing the performance of aeroengines. The utilization of Laser Directed Energy Deposition technology to handle undesirable Laves phases has shown positive effects on the high temperature mechanical properties of these alloys, leading to a significant increase in stress rupture life.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Physical
Yunlong Hu, Yunlong Li, Wei Fan, Xuehao Gao, Qiang Zhang, Qiwei Wang, Wei Li, Xin Lin, Weidong Huang
Summary: This study investigates the plastic behaviors and dynamic recrystallization mechanisms of as-deposited nickel-based superalloy. The results show that as-deposited Inconel 625 has lower hot deformation activation energy compared to wrought Inconel 625. The study also identifies the best hot working conditions for as-deposited Inconel 625 through microstructural evolution and hot processing map analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Siyu Zhang, Jing Chen, Qiang Zhang, Yang Cao, Yunlong Hu, Yongqing Cao, Xin Lin
Summary: The alpha phase evolution and tensile fracture behavior of Ti5Al2Sn2Zr4Mo4Cr alloy fabricated by directed energy deposition (DED) were studied. The results revealed that the samples exhibit various alpha phase characteristics and the further evolution of alpha phase is influenced by consecutive thermal cycles with different durations and temperature amplitudes. The in-situ scanning electron microscopy tensile tests showed that cracks and micro-voids usually initiate on the grain boundaries or alpha/beta interface, and the alpha phase characteristics play a significant role in the deformation behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Wenjun Zhang, Fenggang Liu, Fencheng Liu, Chunping Huang, Haizhong Zheng, Qiang Zhang, Yongsheng Zheng, Jiaying Gao
Summary: Microstructure evolution and cracking behavior of laser directed energy deposited Hastelloy X (HX) block were investigated. It was found that the formation of continuous gamma-M23C6 eutectic at grain boundaries led to hot cracking, especially at high angle grain boundaries (HAGBs) where stress concentration was intensified.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Zhuhao Wen, Yunlong Hu, Weimin Chen, Qiang Zhang, Lijun Zhang, Yong Du
Summary: In this study, Co-Ni-W alloys were analyzed for their elasto-plastic properties using reverse analysis algorithms, and data related to composition were obtained using machine learning methods, showing potential applications in the field of multicomponent alloys research.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Yanfang Wang, Xin Lin, Nan Kang, Zihong Wang, Qingzheng Wang, Yuxi Liu, Weidong Huang
Summary: In this study, Zr-modified 2024Al alloy deposits were prepared using L-PBF technology, with the addition of 1.3wt% Zr, which reduced the solidification cracking susceptibility and improved the grain structure of the alloy. After T6 heat treatment, the yield strength and ultimate tensile strength of the alloy were further increased, reaching comparable or even higher levels than conventional wrought alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Zehao Qin, Nan Kang, Huajing Zong, Chunhui Zhan, Yanbo Fang, Zihong Wang, Mohamed El Mansori, Jing Chen, Xin Lin, Weidong Huang
Summary: This study applies hot isostatic pressing (HIP) to enhance the fatigue properties of L-PBFed alloys by healing porosities and promoting oxidation, highlighting the critical role of oxides in fatigue performance.
MATERIALS RESEARCH LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Minghong Li, Lilin Wang, Haiou Yang, Shuya Zhang, Xin Lin, Weidong Huang
Summary: Selective laser melting (SLM) has unique advantages in manufacturing oxide dispersion strengthened alloys. This study comparatively investigates the microstructure and mechanical properties of Inconel 625 alloy and Y2O3 strengthened Inconel 625 alloy prepared by SLM. The results show that the Y2O3/Inconel 625 specimen has better density, grain structure, and mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Shuoqing Shi, Xin Lin, Lilin Wang, Zhennan Wang, Lei Wei, Haiou Yang, Yao Tang, Weidong Huang
Summary: The microstructure formation mechanism of an AlSi10Mg alloy prepared by laser directed energy deposition (DED-LB) and its influence on the mechanical properties were thoroughly investigated. The relationships between the microstructure characteristic scale, solidification/thermal cycle conditions, and tensile mechanical properties were established. The research findings provide a method for the precision control and large-scale application of DED-AlSi10Mg alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jun Hu, Yunlong Hu, Cunxiao Lan, Qiang Zhang, Feng Jin, Wei Li, Xin Lin, Weidong Huang
Summary: In this study, orthogonal experiments were conducted to investigate the cracking issue of Hastelloy X fabricated by laser powder bed fusion. The results showed that by controlling the volume energy density, altering the morphology of the molten pool, and minimizing residual stress, the cracking density could be significantly reduced, leading to high-quality samples.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Shilei Huang, Xianliang Ming, Yunlong Hu, Qiang Zhang, Ye Tang, Siyu Zhang, Weimin Chen, Xin Lin
Summary: In this study, the microstructural evolution of a directed energy deposited near beta titanium alloy during post-heat treatment was investigated, and its effect on the mechanical properties was evaluated. It was found that the volume fraction of the alpha phase reached equilibrium in a specific temperature range and increased significantly during furnace cooling. The different heat treatment methods resulted in variations in the alpha and beta phases, leading to differences in the mechanical properties of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
