| Stress relaxation behavior of Ti-6Al-4V alloy |
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| 作者姓名： | 刘勇 尹钟大 朱景川 李明伟 |
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| 作者单位： | School of Materials Science and Engineering，School of Materials Science and Engineering，School of Materials Science and Engineering，School of Materials Science and Engineering Harbin Institute of Technology，Harbin 150001，China，Harbin Institute of Technology，Harbin 150001，China，Harbin Institute of Technology，Harbin 150001，China，Harbin Institute of Technology，Harbin 150001，China |
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| 摘 要： | 1 INTRODUCTIONTi 6Al 4VisoneofthemostimportantTial loys1,2 ] .Butthisalloyhasbadformabilityforitshighelasticresilience .Therefore ,hotsizingisimpor tant36 ] .Asthebaseofhotsizing ,thestudyofstressrelaxationhasimportanttheoreticalvalueandpracticalsignificance .Ontheotherhand ,Ti 6Al 4Visusedasfastenermaterialssometimes .Whenthefastenersworkatthetemperaturehigherthanroomtemperature ,stressrelaxationmayresultsinacci dents .Sohowtopreventthestressrelaxationisveryimportant7] .Uptonow ,…
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Stress relaxation behavior of Ti-6Al-4V alloy |
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| LIU Yong,YIN Zhong da,ZHU Jing chuan,LI Ming wei.Stress relaxation behavior of Ti-6Al-4V alloy[J].Transactions of Nonferrous Metals Society of China,2003,13(4). |
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| Authors: | LIU Yong YIN Zhong da ZHU Jing chuan LI Ming wei |
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| Abstract: | The stress relaxation behavior of Ti-6Al-4V alloy was studied and the change in microstructure resulted from stress relaxation was observed by TEM. Results show that stress relaxes very fast in the first stage while slowly in the second stage; the relationship between plastic strain rate and stress can be obtained from stress relaxation experiments. The plastic strain rate exponent is 4 at 400 ℃, and 1.6 at 600 ℃. TEM observation and plastic strain rate exponent show that the dominant deformation mechanisms are dislocation creep at 400 ℃, recovery creep at 600 ℃ and recrystallization at 800 ℃, respectively. The stress relaxation mechanism figure is given. |
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| Keywords: | stress relaxation Ti 6Al 4V alloy microstructure deformation mechanism |
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