| Ageing characteristics and microstructure of Al-4Mg-1.5Cu alloys containing silver and lithium |
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| 作者姓名： | 陈志国 郑子樵 王芝秀 |
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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 Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，Central South University，Changsha 410083，China |
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| 基金项目： | Project(0 1JJY2 0 5 8)supportedbytheNaturalScienceFoundationofHunanProvince China |
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| 摘 要： | 1 INTRODUCTIONTheroleoftraceelementsonageingofAlalloyshasbeenextensivelystudiedandhasbeenrecentlyre viewedbyPolmear ,RingerandPrabhuetal14 ] .Itwasfoundthatthesmalladditionofsilvercanstimu lateenhancedagehardeningincertainAl Cu Mgal loys,andthiseffectisevidentforawiderangeofcompositionsselectedinthe (α +θ) ,(α +S)and (α+S +T ) phasefieldsoftheternary phasedia gram57] .TheadditionofAgtoAl Cu MgalloyswithhighCutoMgratiosstimulatestheformationofanhexagonal shaped precipitate pha…
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Ageing characteristics and microstructure of Al-4Mg-1.5Cu alloys containing silver and lithium |
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| CHEN Zhi-guo,ZHENG Zi-qiao,WANG Zhi-xiu.Ageing characteristics and microstructure of Al-4Mg-1.5Cu alloys containing silver and lithium[J].Transactions of Nonferrous Metals Society of China,2003,13(6). |
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| Authors: | CHEN Zhi-guo ZHENG Zi-qiao WANG Zhi-xiu |
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| Abstract: | The ageing behavior and microstructures of the Al-4Mg-1.5Cu alloys containing silver and lithium have been studied.The results show that the effect of Li is to increase the rate of hardening,however,lithium additions in the range of 0 to 2.0% does not progressively change age hardening and precipitation process in the alloy of Al-4.0Mg-1.5Cu-0.4Ag-0.12Zr aged at 200℃,and significant age hardening and strengthening response only occur with the addition of 2.0% Li.TEM investigation results show that the remarkable increase of age hardness and strength is attributed to the fine dispersion of δ',Z phase and spherical Al3Zr/Al3Li compound particles in the 2.0%Li-containing alloy. |
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| Keywords: | Al alloy ageing microstructure lithium silver |
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