Abstract
Effect of frequency and peak current density of electropulsing on springback behaviors of Ti-6Al-4V titanium alloy was investigated during electrically assisted V-bending tests. The experiments were carried out by controlling variable parameters with a frequency of 0–450 Hz and peak current density of 0–62.5 A/mm2. The results show that springback angle and V-bending load value decrease with increasing frequency and peak current density. Springback can almost be eliminated at 450 Hz and 43.1 A/mm2. Based on neutral layer offset and microstructure analysis, it demonstrates that the reductions of neutral layer radius, bending moment, and residual stress are responsible for the springback reduction. In addition, the refined β phase particles, dissolution of clustered β phase, the reduction of β particle spacing at outer layer, and enhancement of β particle spacing at inner layer contribute to the balance of tensile and compression residual stress, contributing to springback reduction. Effect of peak current densities on the springback behavior under similar RMS current density was carried out and it was found that athermal effect could promote the dislocation motion and unraveling of dislocation pile-ups, further promoting to the springback reduction.
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Liu X, Huang S, Chen FZ, Yang XL, Wu LB, Xu WJ (2014) Research on the cold plasma jet assisted cutting of Ti6Al4V. Int J Adv Manuf Technol 77(9–12):2125–2133. https://doi.org/10.1007/s00170-014-6607-8
Zhu Z, Sui S, Sun J, Li J, Li Y (2017) Investigation on performance characteristics in drilling of Ti6Al4V alloy. Int J Adv Manuf Technol 93 (1–4):651–660. doi:https://doi.org/10.1007/s00170-017-0508-6
Zhou Y, Li P, Li M, Wang L, Sun S (2017) Residual stress and springback analysis for 304 stainless steel tubes in flexible-bending process. Int J Adv Manuf Technol 94(1-4):1317–1325. https://doi.org/10.1007/s00170-017-0993-7
Thipprakmas S (2012) Finite element analysis of sided coined-bead technique in precision V-bending process. Int J Adv Manuf Technol 65(5–8):679–688. https://doi.org/10.1007/s00170-012-4207-z
Zong Y, Liu P, Guo B, Shan D (2014) Springback evaluation in hot V-bending of Ti-6Al-4V alloy sheets. Int J Adv Manuf Technol 76(1–4):577–585. https://doi.org/10.1007/s00170-014-6190-z
Ozturk F, Ece RE, Polat N, Koksal A (2010) Effect of warm temperature on springback compensation of titanium sheet. Mater Manuf Process 25(9):1021–1024. https://doi.org/10.1080/10426914.2010.492056
Wu HB, To S (2015) Effects of electropulsing treatment on material properties and ultra-precision machining of titanium alloy. Int J Adv Manuf Technol 82(9–12):2029–2036. https://doi.org/10.1007/s00170-015-7379-5
Sun Z, Wang H, Ye Y, Xu Z, Tang G (2017) Effects of electropulsing on the machinability and microstructure of GH4169 superalloy during turning process. Int J Adv Manuf Technol. https://doi.org/10.1007/s00170-017-1407-6
Zhou Y, G-q C, X-s F, W-l Z (2014) Effect of electropulsing on deformation behavior of Ti–6Al–4V alloy during cold drawing. Trans Nonferrous Metals Soc China 24(4):1012–1021. https://doi.org/10.1016/s1003-6326(14)63156-3
Ye X, Li X, Song G, Tang G (2014) Effect of recovering damage and improving microstructure in the titanium alloy strip under high-energy electropulses. J Alloys Compd 616:173–183. https://doi.org/10.1016/j.jallcom.2014.07.143
Ye X, Tse ZTH, Tang G, Song G (2014) Effect of electroplastic rolling on deformability, mechanical property and microstructure evolution of Ti–6Al–4V alloy strip. Mater Charact 98:147–161. https://doi.org/10.1016/j.matchar.2014.10.026
Guan L, Tang G, Chu PK (2011) Recent advances and challenges in electroplastic manufacturing processing of metals. J Mater Res 25 (07):1215–1224. doi:https://doi.org/10.1557/jmr.2010.0170
Li X, Wang S, Zhao S, Ding W, Chen J, Wu G (2015) Effect of pulse current on the tensile deformation of SUS304 stainless steel. J Mater Eng Perform 24(12):5065–5070. https://doi.org/10.1007/s11665-015-1804-7
Kuang J, Du X, Li X, Yang Y, Luo AA, Tang G (2016) Athermal influence of pulsed electric current on the twinning behavior of Mg–3Al–1Zn alloy during rolling. Scr Mater 114:151–155. https://doi.org/10.1016/j.scriptamat.2015.12.014
Li X, Zhou Q, Zhao S, Chen J (2014) Effect of pulse current on bending behavior of Ti6Al4V alloy. Procedia Engineering 81:1799–1804. https://doi.org/10.1016/j.proeng.2014.10.235
Ye X, Tang G, Song G, Kuang J (2014) Effect of electropulsing treatment on the microstructure, texture, and mechanical properties of cold-rolled Ti–6Al–4V alloy. J Mater Res 29(14):1500–1512. https://doi.org/10.1557/jmr.2014.171
Lu Z, Guo C, Li P, Wang Z, Chang Y, Tang G, Jiang F (2017) Effect of electropulsing treatment on microstructure and mechanical properties of intermetallic Al 3 Ti alloy. J Alloys Compd 708:834–843. https://doi.org/10.1016/j.jallcom.2017.03.085
Kinsey B, Cullen G, Jordan A, Mates S (2013) Investigation of electroplastic effect at high deformation rates for 304SS and Ti–6Al–4V. CIRP Ann 62(1):279–282. https://doi.org/10.1016/j.cirp.2013.03.058
Magargee J, Morestin F, Cao J (2013) Characterization of flow stress for commercially pure titanium subjected to electrically assisted deformation. Journal of engineering materials and technology 135 (4):041003-1-041003-10 doi:https://doi.org/10.1115/1.4024394
F.Zhu R, Y.Tang G, Q.Shi S, W.Fu M (2013) Microstructure evolution of copper strips with gradient temperature in electropulsing treatment. J Alloys Compd 581:160–165. doi:https://doi.org/10.1016/j.jallcom.2013.07.017
Li D, Yu E, Liu Z (2013) Microscopic mechanism and numerical calculation of electroplastic effect on metal’s flow stress. Mater Sci Eng A 580:410–413. https://doi.org/10.1016/j.msea.2013.05.052
Guoyi Tang JZ, Zheng M (2000) Experimental study of electroplastic effect on stainless steel wire 304L. Mater Sci Eng A 281(1-2):263–267. https://doi.org/10.1016/S0921-5093(99)00708-X
Conrad H (2000) Electroplasticity in metals and ceramics. Mater Sci Eng A 287(2):276–287. https://doi.org/10.1016/S0921-5093(00)00786-3
W. Hart E (1984) A micromechanical basis for constitutive equations with internal state variables. Journal of Engineering Materials & Technology: 106(4):322. doi:https://doi.org/10.1115/1.3225724
Bertoni MI, Powell DM, Vogl ML, Castellanos S, Fecych A, Buonassisi T (2011) Stress-enhanced dislocation density reduction in multicrystalline silicon. Physica status solidi - Rapid Research Letters 5(1):28–30. https://doi.org/10.1002/pssr.201004344
Li H, Dong X, Shen Y, Diehl A, Hagenah H, Engel U, Merklein M (2010) Size effect on springback behavior due to plastic strain gradient hardening in microbending process of pure aluminum foils. Mater Sci Eng A 527(16–17):4497–4504. https://doi.org/10.1016/j.msea.2010.03.105
Zhang DJ, Cui ZS, Chen ZY, Ruan XY (2007) An analytical model for predicting sheet springback after V-bending. Journal of Zhejiang University-SCIENCE A 8(2):237–244. https://doi.org/10.1631/jzus.2007.A0237
Pei C, Fan Q, Cai H, Li J (2010) High temperature deformation behavior of the TC6 titanium alloy under the uniform DC electric field. J Alloys Compd 489(2):401–407. https://doi.org/10.1016/j.jallcom.2009.09.134
Li X, Ji B, Zhou Q, Chen J, Gao P (2016) Influence of grain size on electrically assisted tensile behavior of Ti-6Al-4V alloy. J Mater Eng Perform 25(10):4514–4520. https://doi.org/10.1007/s11665-016-2268-0
Wang L, Huang G, Han T, Mostaed E, Pan F, Vedani M (2015) Effect of twinning and detwinning on the spring-back and shift of neutral layer in AZ31 magnesium alloy sheets during V-bend. Mater Des 68:80–87. https://doi.org/10.1016/j.matdes.2014.12.017
Juijerm P, Altenberger I (2006) Residual stress relaxation of deep-rolled Al–Mg–Si–Cu alloy during cyclic loading at elevated temperatures. Scr Mater 55(12):1111–1114. https://doi.org/10.1016/j.scriptamat.2006.08.047
Ojediran SO, Ajaja O (1988) The Bailey-Orowan equation. J Mater Sci 23(11):4037–4040. https://doi.org/10.1007/bf01106832
Cui WF, Jin Z, Guo AH, Zhou L (2009) High temperature deformation behavior of α+β-type biomedical titanium alloy Ti–6Al–7Nb. Mater Sci Eng A 499(1–2):252–256. https://doi.org/10.1016/j.msea.2007.11.109
Chino Y, Kimura K, Mabuchi M (2008) Twinning behavior and deformation mechanisms of extruded AZ31 Mg alloy. Mater Sci Eng A 486(1–2):481–488. https://doi.org/10.1016/j.msea.2007.09.058
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The authors would like to acknowledge the financial support from Natural Science Foundation of Shandong Province [grant number ZR2016EEM25], China Postdoctoral Science Foundation (CN) [grant number 2016M592184].
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Ao, D., Chu, X., Yang, Y. et al. Effect of electropulsing on springback during V-bending of Ti-6Al-4V titanium alloy sheet. Int J Adv Manuf Technol 96, 3197–3207 (2018). https://doi.org/10.1007/s00170-018-1654-1
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DOI: https://doi.org/10.1007/s00170-018-1654-1