Microstructure and Mechanical Properties of As-Cast Ti-Al-V Alloys with Different Proportion of α / β Clusters
Received date: 2021-11-22
Revised date: 2022-03-07
Online published: 2022-06-28
Supported by
National Basic Research Program of China(2020JCJQZD165);Key Discipline and Major Project of Dalian Science and Technology Innovation Foundation(2020JJ25CY004)
The dual-cluster composition formula of the widely-used α + β Ti-6Al-4V and α-{[Al-Ti12](AlTi2)}12 + β-{[Al-Ti14](V2Ti)}5, reported in our previous work, indicates that all Ti alloys are composed of α and β units. In this study, Ti-(3.19-7.45)Al-(0-12.03)V (mass fraction, %) alloys are designed following composition formula of [Al-Ti12](AlTi2)}17 - n + β-{[Al-Ti14](V2Ti)}n by changing n value (number of β cluster units). The alloys as prepared by copper mould suction-casting cover microstructures ranging from pure α to pure β. In the as-cast state, as the n value increases, the microstructure changes from single α phase (α' martensite), via α + β dual-phase, and finally to single β phase. The morphology of α' martensite gradually changes from plate-like to lamellar and needle-like. Ti-6Al-4V alloy corresponds to n = 5, where β phase begins to appear. When n = 8, needle-like α' martensite shows the highest content. When n = 12, α phase disappears completely and is replaced by β phase. Correspondingly, the strength of the alloys increases first and then decreases, while the plasticity changes inversely, due to the presence of fine-needle α' martensite. Among all the compositions, Ti-5.28Al-6.14V alloy (n = 8) shows the highest strength (about 90 MPa higher than Ti-6Al-4V), with tensile strength of 1019 MPa, yield strength of 867 MPa. Its specific strength and hardness of 230 kN·m/kg and 0.76 GPa·cm3/g increased by 9% and 5%, respectively, are both superior to Ti-6Al-4V.
ZHU Zhihao , CHEN Zhipeng , LIU Tianyu , ZHANG Shuang , DONG Chuang , WANG Qing . Microstructure and Mechanical Properties of As-Cast Ti-Al-V Alloys with Different Proportion of α / β Clusters[J]. Acta Metall Sin, 2023 , 59(12) : 1581 -1589 . DOI: 10.11900/0412.1961.2021.00503
| 1 | Liu T Y, Zhang S, Wang Q, et al. Composition formulas of Ti alloys derived by interpreting Ti-6Al-4V[J]. Sci. China Technol. Sci., 2021, 64: 1732 |
| 2 | Mehjabeen A, Xu W, Qiu D, et al. Redefining the β-phase stability in Ti-Nb-Zr alloys for alloy design and microstructural prediction[J]. JOM, 2018, 70: 2254 |
| 3 | Kitashima T, Suresh K S, Yamabe-Mitarai Y. Effect of germanium and silicon additions on the mechanical properties of a near-α titanium alloy[J]. Mater. Sci. Eng., 2014, A597: 212 |
| 4 | Wei B Q, Ni S, Liu Y, et al. Phase transformation and structural evolution in a Ti-5at.%Al alloy induced by cold-rolling[J]. J. Mater. Sci. Technol., 2020, 49: 211 |
| 5 | Qian B N, Zhang J Y, Fu Y Y, et al. In-situ microstructural investigations of the TRIP-to-TWIP evolution in Ti-Mo-Zr alloys as a function of Zr concentration[J]. J. Mater. Sci. Technol., 2021, 65: 228 |
| 6 | Dai S J, Wang Y, Chen F, et al. Design of new biomedical titanium alloy based on d-electron alloy design theory and JMatPro software[J]. Trans. Nonferrous Met. Soc. China, 2013, 23: 3027 |
| 7 | Manda P, Pathak A, Mukhopadhyay A, et al. Ti-5Al-5Mo-5V-3Cr and similar Mo equivalent alloys: First principles calculations and experimental investigations[J]. J. Appl. Res. Technol., 2017, 15: 21 |
| 8 | Dong C, Wang Q, Qiang J B, et al. From clusters to phase diagrams: Composition rules of quasicrystals and bulk metallic glasses[J]. J. Phys., 2007, 40D: R273 |
| 9 | Jiang B B, Wang Q, Dong C, et al. Exploration of phase structure evolution induced by alloying elements in Ti alloys via a chemical-short-range-order cluster model[J]. Sci. Rep., 2019, 9: 3404 |
| 10 | Dong C, Wang Z J, Zhang S, et al. Review of structural models for the compositional interpretation of metallic glasses[J]. Int. Mater. Rev., 2020, 65: 286 |
| 11 | Dong C, Dong D D, Wang Q. Chemical units in solid solutions and alloy composition design[J]. Acta Metall. Sin., 2018, 54: 293 |
| 董 闯, 董丹丹, 王 清. 固溶体中的化学结构单元与合金成分设计[J]. 金属学报, 2018, 54: 293 | |
| 12 | Zhang S, Dong C. Dual-cluster interpretation of binary eutectics associated with hexagonal close-packed solid solution phases[J]. Mater. Lett., 2018, 233: 71 |
| 13 | Zhai B, Zhou K, Lv P, et al. Rapid solidification of Ti-6Al-4V alloy micro-droplets under free fall condition[J]. Acta Metall. Sin., 2018, 54: 824 |
| 翟 斌, 周 凯, 吕 鹏 等. 自由落体条件下Ti-6Al-4V合金微液滴的快速凝固研究[J]. 金属学报, 2018, 54: 824 | |
| 14 | Chong Y, Bhattacharjee T, Tian Y Z, et al. Deformation mechanism of bimodal microstructure in Ti-6Al-4V alloy: The effects of intercritical annealing temperature and constituent hardness[J]. J. Mater. Sci. Technol., 2021, 71: 138 |
| 15 | Liu T Y, Zhu Z H, Zhang S, et al. A novel Ti-4.13Al-9.36V alloy of high ductility designed on base of α″-microstructure for laser solid forming[J]. Chin. J. Mater. Res., 2021, 35: 741 |
| 刘田雨, 朱智浩, 张 爽 等. 基于α″组织设计适于激光立体成形的新型高塑性Ti-4.13Al-9.36V合金[J]. 材料研究学报, 2021, 35: 741 | |
| 16 | Ma J K, Li J J, Wang Z J, et al. Bonding zone microstructure and mechanical properties of forging-additive hybrid manufactured Ti-6Al-4V alloy[J]. Acta Metall. Sin., 2021, 57: 1246 |
| 马健凯, 李俊杰, 王志军 等. 锻造-增材复合制造Ti-6Al-4V合金结合区显微组织及力学性能[J]. 金属学报, 2021, 57: 1246 | |
| 17 | Liu T Y, Zhu Z H, Zhang S, et al. Design for Ti-Al-V-Mo-Nb alloys for laser additive manufacturing based on a cluster model and on their microstructure and properties[J]. China Foundry, 2021, 18: 424 |
| 18 | Deng A H. Martensitic transformation of titanium alloys[J]. Shanghai Nonferrous Met., 1999, (4): 193 |
| 邓安华. 钛合金的马氏体相变[J]. 上海有色金属, 1999, (4): 193 | |
| 19 | Liu Z C, Zhang L J, Zhang C H. Effect of oxygen content on the mechanical properties of TC4 titanium alloy[J]. World Nonferrous Met., 2016, (16): 151 |
| 刘志成, 张利军, 张晨辉. 氧含量对TC4钛合金力学性能的影响[J]. 世界有色金属, 2016, (16): 151 | |
| 20 | Mao J H, Yang X K, Luo B L. Effect of element Fe on mechanical properties of TC4ELI alloy[J]. Heat Treat. Met., 2019, 44(6): 95 |
| 毛江虹, 杨晓康, 罗斌莉. Fe元素对TC4ELI合金力学性能的影响[J]. 金属热处理, 2019, 44(6): 95 | |
| 21 | Wang Q, Ji C J, Wang Y M, et al. β-Ti Alloys with low young's moduli interpreted by cluster-plus-glue-atom model[J]. Metall. Mater. Trans., 2013, 44A: 1872 |
| 22 | Wang Z R, Qiang J B, Wang Y M, et al. Composition design procedures of Ti-based bulk metallic glasses using the cluster-plus-glue-atom model[J]. Acta Mater., 2016, 111: 366 |
| 23 | Ji Q, Wang Y, Wu R Z, et al. High specific strength Mg-Li-Zn-Er alloy processed by multi deformation processes[J]. Mater. Charact., 2020, 160: 110135 |
| 24 | Alizadeh M, Beni H A, Ghaffari M, et al. Properties of high specific strength Al-4wt.%Al2O3/B4C nano-composite produced by accumulative roll bonding process[J]. Mater. Des., 2013, 50: 427 |
| 25 | Zhou Y J, Sun K X, Zhang Y M, et al. Preparing process of ZL101A alloy by vacuum casting and its properties[J]. Foundry, 2011, 60: 1167 |
| 周延军, 宋克兴, 张彦敏 等. 真空熔铸法制备ZL101A合金工艺及性能研究[J]. 铸造, 2011, 60: 1167 | |
| 26 | Raganya L, Moshokoa N, Obadele B A, et al. Investigation of the tensile properties of heat treated Ti-Mo alloys[J]. Mater. Today, 2021, 38: 1044 |
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