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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 1    March 1999

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AGEING CHARACTERISTICS AND MICROSTRUCTURE OF Al-Mg-Li ALLOYS CONTAINING SMALL AMOUNT OF SILVER①
Chen Zhiguo and Zheng Ziqiao

Department of Materials Science and Engineering,Central South University of Technology, Changsha 410083, P. R. China

Abstract:The ageing behavior and microstructures of the Al-Mg-Li alloys containing small amounts of silver have been studied. The results showed that small quantities of silver could modify the ageing characteristics of Al-Mg-Li alloys, enhance the peak hardness and strength, and delay the ageing peaks. X-Ray diffraction analysis showed thatTphase was present in the Al-Mg-Li alloy containing 0.52%(mass fraction, %) Ag, and TEM observations showed that silver prevented the growth ofδ′phase during ageing.

 

Key words: Al-Li alloy ageing microstructure silver

ISSN 1672-7029
CN 43-1423/U

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