Effect of Solution Temperature on Dynamic Mechanical Properties and Microstructure of TB6 Titanium Alloy
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摘要: 研究了固溶温度对近β相TB6钛合金动态力学性能和微观组织的影响。以分离式霍普金森压杆为加载手段，对固溶处理前后的TB6钛合金进行了动态压缩试验。结果表明：固溶处理前后TB6钛合金都具有应变率强化效应，压缩破坏形式为典型的剪切破坏；TB6钛合金由应变硬化效应转变为应变软化效应的固溶温度为700～750 ℃。光学显微镜观测、X射线衍射和扫描电镜表征结果表明：700 ℃固溶处理后，TB6钛合金中的初生α相部分溶解，强度下降；750 ℃及以上固溶处理后，初生α相全部转化为β相，β晶粒长大，强度提升，但塑性显著降低。Abstract: The effect of solution temperature on the dynamic mechanical properties and microstructure of near-β-phase TB6 titanium alloy was studied. Dynamic compression tests were carried out through the split Hopkinson pressure bar (SHPB) system, with untreated and treated TB6 titanium alloy specimens. The results indicate that both the untreated and treated TB6 titanium alloys perform the strengthening effect of strain rate, and their compression mode is exhibited as the typical shear failure. The solution temperature that converts the strain hardening of TB6 into strain softening is ranging from 700 ℃ to 750 ℃. The microscopic performance characterized by optical microscope (OM), X-ray diffraction (XRD) and scanning electron microscopy (SEM) methods show that the primary α-phase in TB6 is partially dissolved and the strength decreases after a solution treatment at 700 ℃. When the solution treatment is equal to or greater than 750 ℃, the primary α-phase is completely transformed into β-phase. The β grain becomes bigger and the strength increases, but the plasticity decreases evidently.
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图 4 不同应变率下的真应力-真应变曲线（固溶温度为700 ℃）
Figure 4. True stress versus true strain at different strain rates (at 700 ℃ solution)
图 5 不同处理后的试样第一次剪切破环时的真应力-塑性应变曲线
Figure 5. True stress versus plastic strain for the first shear fracture of the specimens treated at different temperatures
图 6 不同固溶温度处理后试样的屈服应力-应变率曲线
Figure 6. Yield stress versus strain rate of specimens treated at different solution temperatures
图 7 1100 s−1时不同固溶温度处理后的真应力-真应变曲线
Figure 7. True stress versus true strain of specimens treated at different temperatures loading at 1100 s−1 strain rate
图 8 不同固溶温度条件下材料的显微组织
Figure 8. Microstructures of specimens treated at different solution temperatures
图 9 不同固溶温度条件下试样的XRD谱
Figure 9. XRD patterns of specimens treated at different solution temperatures
图 10 不同温度固溶处理后试样的断面形貌
Figure 10. Cross-section morphologies of specimens treated at different solution temperatures
H O N Fe Al V Ti 0.01 0.03 0.03 1.93 2.93 10.13 Rest 
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表 2 试样第一次破坏时的力学性能指标
Table 2. Mechanical performance of specimens for the first shear fracture
Temperature/℃ Maximum plastic strain Yield stress Value Ratio/% Value/MPa Ratio/% Untreated 0.1817 1115 700 0.1660 −8.64 1010 −9.42 750 0.0621 −65.82 1275 14.35 800 0.0254 −86.02 1323 18.65
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[1] BOYER R R. An overview on the use of titanium in the aerospace industry [J]. Materials Science and Engineering: A, 1996, 213(1/2): 103–114. doi: 10.1016/0921-5093(96)10233-1 [2] LEE S W, PARK C H, HONG J K, et al. Effect of solution treatment and aging conditions on tensile properties of Ti-Al-Fe-Si alloy [J]. Materials Science and Engineering: A, 2017, 697: 158–166. doi: 10.1016/j.msea.2017.05.022 [3] 母果路, 廖强, 王兴, 等. 固溶加时效处理对Gr.36钛合金棒材组织及性能的影响 [J]. 钛工业进展, 2017, 34(2): 28–32.MU G L, LIAO Q, WANG X, et al. Effect of solution and aging treatment on microstructures and mechanical properties of Gr.36 titanium alloy bars [J]. Titanium Industry Progress, 2017, 34(2): 28–32. [4] RAN C, ZHOU Q, CHEN P W, et al. Comparative experimental study of the dynamic properties and adiabatic shear susceptibility of titanium alloys [J]. European Journal of Mechanics-A/Solids, 2021, 85: 104137. doi: 10.1016/j.euromechsol.2020.104137 [5] RAN C, SHENG Z M, CHEN P W, et al. Effect of microstructure on the mechanical properties of Ti-5Al-5Mo-5V-1Cr-1Fe alloy [J]. Materials Science and Engineering: A, 2020, 773: 138728. doi: 10.1016/j.msea.2019.138728 [6] RAN C, CHEN P W, LI L, et al. High-strain-rate plastic deformation and fracture behaviour of Ti-5Al-5Mo-5V-1Cr-1Fe titanium alloy at room temperature [J]. Mechanics of Materials, 2018, 116: 3–10. doi: 10.1016/j.mechmat.2017.08.007 [7] 冉春, 陈鹏万, 李玲, 等. 中高应变率条件下TC18钛合金动态力学行为的实验研究 [J]. 兵工学报, 2017, 38(9): 1723–1728. doi: 10.3969/j.issn.1000-1093.2017.09.008RAN C, CHEN P W, LI L, et al. Experimental research on dynamic mechanical behavior of TC18 titanium alloy under medium and high strain rates [J]. Acta Armamentarii, 2017, 38(9): 1723–1728. doi: 10.3969/j.issn.1000-1093.2017.09.008 [8] 邹学韬, 张晓晴, 姚小虎. 压剪载荷作用下TB6钛合金的动态力学性能 [J]. 高压物理学报, 2019, 33(2): 024206. doi: 10.11858/gywlxb.20190713ZOU X T, ZHANG X Q, YAO X H. Dynamic behavior of TB6 titanium alloy under shear-compression loading [J]. Chinese Journal of High Pressure Physics, 2019, 33(2): 024206. doi: 10.11858/gywlxb.20190713 [9] 庄仕明, 丰树平, 王春彦, 等. 高应变率下TC4及TC9钛合金的动态断裂 [J]. 高压物理学报, 1995, 9(2): 96–106. doi: 10.11858/gywlxb.1995.02.003ZHUANG S M, FENG S P, WANG C Y, et al. Dynamic fracture of TC4 and TC9 titanium alloys at high strain rates [J]. Chinese Journal of High Pressure Physics, 1995, 9(2): 96–106. doi: 10.11858/gywlxb.1995.02.003 [10] NASERI R, CASILLAS G, MITCHELL D R G, et al. Effect of strain on microstructural development during uniaxial compression of metastable beta Ti-10V-2Fe-3Al alloy [J]. Materials Science and Engineering: A, 2021, 804: 140720. doi: 10.1016/j.msea.2020.140720 [11] QI L C, QIAO X L, HUANG L J, et al. Effect of structural stability on the stress induced martensitic transformation in Ti-10V-2Fe-3Al alloy [J]. Materials Science and Engineering: A, 2019, 756: 381–388. doi: 10.1016/j.msea.2019.04.058 [12] QUAN G Z, LV W Q, LIANG J T, et al. Evaluation of the hot workability corresponding to complex deformation mechanism evolution for Ti-10V-2Fe-3Al alloy in a wide condition range [J]. Journal of Materials Processing Technology, 2015, 221: 66–79. doi: 10.1016/j.jmatprotec.2015.02.002 [13] SONG B, CHEN Y, XIAO W L, et al. Formation of intermediate phases and their influences on the microstructure of high strength near-β titanium alloy [J]. Materials Science and Engineering: A, 2020, 793: 139886. doi: 10.1016/j.msea.2020.139886 [14] MA X K, CHEN Z, XIAO L, et al. Stress-induced martensitic transformation in a β-solution treated Ti-10V-2Fe-3Al alloy during compressive deformation [J]. Materials Science and Engineering: A, 2021, 801: 140404. doi: 10.1016/j.msea.2020.140404 [15] CHEN W, YAO S S, LIU R L, et al. Enhanced grain refining efficiency assisted by martensitic transformation in metastable β-titanium alloy [J]. Rare Metal Materials and Engineering, 2015, 44(7): 1601–1606. doi: 10.1016/S1875-5372(15)30100-4 [16] 张俊喜, 易湘斌, 沈建成, 等. 固溶和工作温度对TC21钛合金动态压缩性能和绝热剪切敏感性的影响 [J]. 材料导报, 2020, 34(24): 24092–24096. doi: 10.11896/cldb.19070199ZHANG J X, YI X B, SHEN J C, et al. Influence of solution and ambient temperature on dynamic compression mechanical properties and adiabatic shear sensitivity of TC21 titanium alloy [J]. Materials Reports, 2020, 34(24): 24092–24096. doi: 10.11896/cldb.19070199 [17] LI C L, ZOU L N, FU Y Y, et al. Effect of heat treatments on microstructure and property of a high strength/toughness Ti-8V-1.5Mo-2Fe-3Al alloy [J]. Materials Science and Engineering: A, 2014, 616: 207–213. doi: 10.1016/j.msea.2014.08.025 [18] 鹿超龙, 杨文成, 权国政, 等. 固溶+时效处理对TB6钛合金组织的影响 [J]. 热加工工艺, 2020: 1–4. doi: 10.14158/j.cnki.1001-3814.20181298LU C L, YANG W C, QUAN G Z, et al. Effect of solution and aging treatment on microstructure of TB6 titanium alloy [J]. Hot Working Technology, 2020: 1–4. doi: 10.14158/j.cnki.1001-3814.20181298 [19] 易湘斌, 芮执元, 贺瑗, 等. 不同冷却润滑条件下TB6钛合金高速铣削切屑形态研究 [J]. 制造技术与机床, 2019(7): 85–88. doi: 10.19287/j.cnki.1005-2402.2019.07.016YI X B, RUI Z Y, HE Y, et al. Study on chip morphology of TB6 titanium alloy in high speed milling under different cooling and lubrication conditions [J]. Manufacturing Technology and Machine Tool, 2019(7): 85–88. doi: 10.19287/j.cnki.1005-2402.2019.07.016 [20] 王礼立, 余同希, 李永池. 冲击动力学进展[M]. 合肥: 中国科学技术大学出版社, 1992.WANG L L, YU T X, LI Y C. Progress in impact dynamics [M]. Hefei: University of Science and Technology of China Press, 1992. [21] 叶萃. TB6钛合金室温塑性机制研究[D]. 贵阳: 贵州大学, 2015.YE C. Study on room temperature plasticity mechanism of TB6 titanium alloy [D]. Guiyang: Guizhou University, 2015. [22] BAI Y L, XUE Q, XU Y B, et al. Characteristics and microstructure in the evolution of shear localization in Ti-6A1-4V alloy [J]. Mechanics of Materials, 1994, 17(2/3): 155–164. doi: 10.1016/0167-6636(94)90056-6 -
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