| Effect of high density electropulsing treatment on formability of TC4 titanium alloy sheet |
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| 作者单位： | School of Materials Science and Engineering Harbin Institute of Technology，School of Materials Science and Engineering，Harbin Institute of Technology，School of Materials Science and Engineering，Harbin Institute of Technology，Harbin 150001，China，Harbin 150001，China，Harbin 150001，China |
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| 基金项目： | The authors are grateful to Professor GU0 Jing-dong and WANG Bao-quan of Metal Research Institute, Chinese Academy of Sciences （CAS） for their help in the electropulsing treatment experiments. |
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| 摘 要： | An annealed TC4 titanium alloy sheet was treated by high density electropulsing(Jmax=(5.09-5.26)×103A/mm2,tp=110μs)under ambient conditions.The effect of electropulsing treatment(EPT)on the plastic deformation behavior of TC4 titanium alloysheet was studied using uniaxial tension tests.The experimental results indicate that electropulsing treatment significantly changesthe mechanical properties of sheet metal:the uniform elongation is increased by 35%,the yield stress is decreased by 19.8%and theyield to tensile ratio is decreased by 17.6%.It is of significant meaning to improve the formability of TC4 titanium alloy sheet.Theoptical microscope and scanning electron microscope(SEM)were used to examine the changes of the microstructure and the fracturemorphology before and after the electropulsing treatment.It is found that recrystallization occurs in the sheet metal and dimples infracture surface are large and deep after the electropulsing treatment.The research results show that the electropulsing treatment is aneffective method to improve the formability of titanium alloy sheets.
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| 关 键 词： | 钛合金 电脉冲技术 机械性能 扫描电镜 |
| 收稿时间： | 2006-06-07 |
| 修稿时间： | 2006-10-25 |
Effect of high density electropulsing treatment on formability of TC4 titanium alloy sheet |
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| SONG Hui,WANG Zhong-jin,GAO Tie-jun. Effect of high density electropulsing treatment on formability of TC4 titanium alloy sheet[J]. Transactions of Nonferrous Metals Society of China, 2007, 17(1): 87-92. DOI: 10.1016/S1003-6326(07)60053-3 |
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| Authors: | SONG Hui WANG Zhong-jin GAO Tie-jun |
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| Affiliation: | School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | An annealed TC4 titanium alloy sheet was treated by high density electropulsing (Jmax=(5.09–5.26)×103 A/mm2, tp=110 μs) under ambient conditions. The effect of electropulsing treatment(EPT) on the plastic deformation behavior of TC4 titanium alloy sheet was studied using uniaxial tension tests. The experimental results indicate that electropulsing treatment significantly changes the mechanical properties of sheet metal: the uniform elongation is increased by 35%, the yield stress is decreased by 19.8% and the yield to tensile ratio is decreased by 17.6%. It is of significant meaning to improve the formability of TC4 titanium alloy sheet. The optical microscope and scanning electron microscope(SEM) were used to examine the changes of the microstructure and the fracture morphology before and after the electropulsing treatment. It is found that recrystallization occurs in the sheet metal and dimples in fracture surface are large and deep after the electropulsing treatment. The research results show that the electropulsing treatment is an effective method to improve the formability of titanium alloy sheets. |
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| Keywords: | TC4 alloy titanium alloy sheet electropulsing treatment formability |
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