| Residual stress in quenched 7075 aluminum alloy thick plates |
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| 作者姓名： | 林高用 张辉 朱伟 彭大暑 梁轩 周鸿章 |
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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，School of Materials Science and Engineering，Northeast Light Alloys Cooperation Limited Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，College of Materials Science and Engineering，Hunan University，Changsha 410082，China，Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，Harbin 150060，China |
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| 基金项目： | Project (G19990 64 90 8)supportedbytheNationalKeyFundamentalResearchandDevelopmentProgramofChina |
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| 摘 要： | 1 INTRODUCTION70 75isoneoftheprecipitation hardenedalu minumalloysmainlyusedasplateandforgingsintheaerospaceindustry .Itshighstrengthisachievedthroughaquenchingoperationwherethematerialisrapidlycooledfromthesolutionheattreatmenttem perature(4 75℃ )toroomtemperature ,whichcancausetheadverseeffectofintroducingresidualstress ,leavingthematerialunsuitableforfurthermachiningoperationsandforservice13] .Residualstressinthequenchingoperationforaluminumalloysisusuallystudiedbynumericalprediction…
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Residual stress in quenched 7075 aluminum alloy thick plates |
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| LIN Gao yong ,ZHANG Hui ,ZHU Wei ,PENG Da shu ,LIANG Xuan ,ZHOU Hong zhang.Residual stress in quenched 7075 aluminum alloy thick plates[J].Transactions of Nonferrous Metals Society of China,2003,13(3). |
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| Authors: | LIN Gao yong ZHANG Hui ZHU Wei PENG Da shu LIANG Xuan ZHOU Hong zhang |
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| Affiliation: | LIN Gao yong 1,ZHANG Hui 1,2,ZHU Wei 1,PENG Da shu 1,LIANG Xuan 1,ZHOU Hong zhang 3 |
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| Abstract: | The influence of quenching water temperature, pre-stretching amount and aging temperature and times on residual stress in 7075 aluminum thick plate was studied by the measurement of residual stress using drilling hole method. The results indicate that residual stress decreases by 30% with increasing quenching water temperature from 40 ℃ to 80 ℃, 20% with increasing aging temperature from 100 ℃ to 180 ℃,and 20% with increasing aging times from 5 h to 25 h. Also, residual stress decreases to zero with increasing pre-stretching amount to approximately 2%. Hence, residual stress in 7075 aluminum thick plate is reduced by the control of quenching water temperature at 80 ℃ and with pre-stretching amount of about 2%. An optimal aging temperature and time should be systemically investigated to obtain combination of high mechanical performances and lower residual stress for manufacturing of 7075 aluminum alloy thick plates. |
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| Keywords: | 7075 aluminum alloy thick plate quenching residual stress |
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