| 42 | 0 | 7 |
| 下载次数 | 被引频次 | 阅读次数 |
为探究提升钛合金力学性能的新途径，开发了脉冲电流处理装置，其可在数秒内使试样温度达到900℃,该技术具有速度快、节能的优势，并开展了不同占空比下脉冲电流处理对TC4钛合金力学性能和微观组织快速改性的研究。与常规固溶处理相比，经不同占空比脉冲电流处理后的试样强度均有不同程度的提升，屈服强度和抗拉强度的最大增幅分别为20.87%和10.86%。采用扫描电子显微镜(SEM)和电子背散射衍射(EBSD)等表征手段发现，脉冲电流的热效应和非热效应相互协同作用促进了TC4钛合金中位错的移动，引发元素扩散、相变以及晶粒尺寸变化。研究结果与分析表明，适当的电脉冲参数能够通过相变和快速晶粒细化，达到改善TC4钛合金的力学性能的目的。
Abstract：To explore new approaches to enhance the mechanical properties of titanium alloy, a pulsed current treatment device was developed, which can raise the temperature of the specimen to 900 ℃ within a few seconds. This technology has the advantages of high speed and energy conservation. A study was carried out on the rapid modification of the mechanical properties and microstructure of TC4 titanium alloy through pulsed current treatment with different duty cycles. Compared with conventional solid solution treatment, the strength of specimens treated by pulsed current with different duty cycles is improved to varying degrees. The maximum increase amplitude in yield strength and tensile strength are 20.87% and 10.86%, respectively. Characterization methods such as scanning electron microscopy(SEM) and electron backscatter diffraction(EBSD) reveale that the synergistic effect of the thermal and non-thermal effects of pulsed current promotes the movement of dislocations in TC4 titanium alloy, triggering elemental diffusion, phase transformation and changes of grain size. The research results and analysis indicate that appropriate electrical pulse parameters can improve the mechanical properties of TC4 titanium alloy through phase transformation and rapid grain refinement.
[1] 董龙龙，俞树荣，李淑欣，等.TC4合金摩擦磨损演化与仿真研究[J].稀有金属，2025,49(4):465-475.DONG Longlong,YU Shurong,LI Shuxin,et al.Research on frictional wear evolutions and simulation of TC4 alloy[J].Chinese Journal of Rare Metals,2025,49(4):465-475.
[2] 庞国鑫，张宝，李明浩，等.TA15钛合金电流辅助V型弯曲成形工艺研究[J].塑性工程学报，2025,32(9):55-63.PANG Guoxin,ZHANG Bao,LI Minghao,et al.Research on electrically-assisted V-shaped bending forming process of TA15 titanium alloy[J].Journal of Plasticity Engineering,2025,32(9):55-63.
[3] POHANKA M,KOTRBAEK P,GOLANSKI G,et al.Heat treatment-conventional and novel applications [M].Rijeka:Intech Open,2012.
[4] LI X N,XU Z T,HUANG J H,et al.Effects of electropulsing treatment on the element diffusion between Ti-6Al-4V and commercially pure titanium [J].Journal of Manufacturing Science and Engineering,Transactions of the ASME,2020,142(5):051002.
[5] SONG T F,JIANG X S,SHAO Z Y,et al.Microstructure and mechanical properties of vacuum diffusion bonded joints between Ti-6Al-4V titanium alloy and AISI316L stainless steel using Cu/Nb multi-interlayer [J].Vacuum,2017,145:68-76.
[6] SHEED D J,KASHYAP B P,SINGH R P.Grain refinement in Ti-6Al-4V alloy during thermo-mechanical processing and investigation of flow properties [C]//Springer,San-Diego,2014:93-100.
[7] KUMAR P,PRAKASH O,RAMAMURTY U.Micro-and meso-structures and their influence on mechanical properties of selectively laser melted Ti-6Al-4V [J].Acta Materialia,2018,154:246-260.
[8] LI X F,JI B Y,ZHOU Q,et al.Influence of grain size on electrically assisted tensile behavior of Ti-6Al-4V Alloy [J].Journal of Materials Engineering and Performance,2016,25(10):4514-4520.
[9] ZHOU C,ZHAN L H,LI H,et al.Creep ageing behaviour assisted by electropulsing under different stresses for Al-Cu-Li alloy [J].Transactions Nonferrous Metals Society of China,2021,31(7):1916-1929.
[10] ZHAO Y X,PENG L F,LAI X M.Influence of the electric pulse on spring back during stretch U-bending of Ti-6Al-4V titanium alloy sheets [J].Journal of Materials Processing Technology,2018,261:12-23.
[11] JEONG H J,KIM M J,PARK J W,et al.Effect of pulsed electric current on dissolution of Mg17Al12 phases in as-extruded AZ91 magnesium alloy [J].Materials Science and Engineering:A,2017,684:668-676.
[12] YE Y D,KURE-CHU S Z,SUN Z Y,et al.Nanocrystallization and enhanced surface mechanical properties of commercial pure titanium by electropulsing-assisted ultrasonic surface rolling [J].Materials & Design,2018,149:214-227.
[13] FAN G Q,SUN F T,MENG X G,et al.Electric hot incremental forming of Ti-6Al-4V titanium sheet [J].International Journal of Advanced Manufacturing Technology,2010,49(9-12):941-947.
[14] FAN G Q,GAO L,HUSSAIN G,et al.Electric hot incremental forming:A novel technique [J].International Journal of Machine Tools & Manufacture,2008,48(15):1688-1692.
[15] CHEN K,ZHAN L H,XU Y Q,et al.Optimizing strength and ductility in 7150 Al alloys via rapid electropulsing cyclic heat treatment [J].Journal of Alloys and Compounds,2022,903:163985.
[16] PEI C H,FAN Q B,CAI H N,et al.High temperature deformation behavior of the TC6 titanium alloy under the uniform DC electric field [J].Journal of Alloys and Compounds,2010,489(2):401-407.
[17] FU J S,SHANG W,JUN H L,et al.Effect of electric pulse treatment on the microstructure and machining performance of Ti-6Al-4V [J].Journal of Materials and Engineering and Performance,2024,33(3):1169-1178.
[18] PERKINS T A,KRONENBERGER T J,ROTH J T.Metallic forging using electrical flow as an alternative to warm/hot working [J].Journal of Manufacturing Science and Engineering,2006,129(1):84-94.
[19] HE W,DU X P,MA H Z.Determination and analysis of phase transition temperature of TC4 titanium alloy [J].Physical and Chemical Tests:Physics Fascicle,2014,504(7):461-464.
[20] 韩颢源，杨涛，邱娟，等.固溶处理对TC4合金组织和硬度的影响 [J].金属热处理，2022,47(6):93-98.HAN Haoyuan,YANG Tao,QIU Juan,et al.Effect of solution treatment onmicrostructure and hardness of TC4 alloy [J].Heat Treatment of Metals,2022,47(6):93-98.
[21] KACHER J,EFTINK B P,CUI B,et al.Dislocation interactions with grain boundaries [J].Current Opinion in Solid State and Materials Science,2014,18(4):227-243.
[22] 徐铁伟，张丰收，刘向宏，等.Ti-15Mo-3Al-2.7Nb-0.2Si钛合金强化效应与机理研究 [J].热加工工艺，2014,43(20):56-59.XU Tiewei,ZHANG Fengshou,LIU Xianghong,et al.Strengthening effect and mechanism of Ti-15Mo-3Al-2.7Nb-0.2Si titanium alloy [J].Hot Working Technology,2014,43(20):56-59.
[23] LIU X,QIAN Y,FAN Q B,et al.Plastic deformation mode and α/β slip transfer of Ti-5Al-2.5Cr-0.5Fe-4.5Mo-1Sn-2Zr-3Zn titanium alloy at room temperature [J].Journal of Alloys and Compounds,2020,826:154209.
[24] GAO X,ZHANG N,ZHANG Y,et al.Exploring the heat treatment parameters,microstructural evolution,and mechanical properties of Ti-6Al-4V alloy fabricated by a selective laser melting process [J].Metals and Materials International,2022,28(11):2596-2612.
[25] GARCIA S L,LOPEZ B,PEREDA B.Effect of coiling conditions on the strengthening mechanisms of Nb microalloyed steels with high Ti addition levels [J].Materials Science and Engineering:A,2019,748:386-395.
[26] DU B N,YANG J X,CUI C Y,et al.Effects of grain refinement on the microstructure and tensile behavior of K417G superalloy [J].Material Science and Engineering:A,2015,623:59-67.
[27] VALKOV S,ORMANOVA M,PETROV P.Electron-beam surface treatment of metals and alloys:Techniques and trends [J].Metals,2020,10(9):1219.
[28] TANG D,ZHOU B L,CAO H,et al.Thermal-stress relaxation behavior in thin-films under transient laser-pulse heating [J].Jornal of Applied Physics,1993,73:3749-3752.
[29] HUANG S S,ZHANG J H,MA Y J,et al.Influence of thermal treatment on element partitioning in α+β titanium alloy [J].Journal of Alloys and Compounds,2019,791:575-585.
[30] ZHANG J H,JU H T,XU H S,et al.Effects of heating rate on the alloy element partitioning and mechanical properties in equiaxed α-β Ti-6Al-4V alloy[J].Journal of Materials Science and Technology,2021,94:1-9.
[31] 张连基，胡青苗，杨锐.钛合金中原子迁移性质的第一原理研究 [J].稀有金属材料与工程，2017,46(S1):246-249.ZHANG Lianji,HU Qingmiao,YANG Rui.First-principles investigations of atom migration in a-titanium [J].Rare Metal Materials and Engineering,2017,46(S1):246-249.
[32] WU H,ZHAO Y Q,GE P,et al.Effect of β stabilizing elements on the strengthening behavior of titanium α phase [J].Rare Metal Materials and Engineering,2012,41(5):805-810.
[33] CONRAD H.Effects of electric current on solid state phase transformations in metals[J].Materials Science and Engineering:A,2000,287:227-237.
[34] MESSERSCHMIDT U.Dislocation dynamics during plastic deformation [M].Heidelberg:Springer Berlin,2010.
基本信息:
中图分类号:TG146.23
引用信息:
[1]彭文飞,康健,邵熠羽,等.脉冲电流占空比对TC4钛合金组织和力学性能的影响[J].塑性工程学报,2026,33(03):77-86.
基金信息:
浙江省自然科学基金资助项目(LMS25E050015); 鄞州区企业“卡脖子”技术研发(HX2024000842); 宁波市科技创新2025重大专项(2021Z099)