Acta Metall Sin  1991, Vol. 27 Issue (5): 21-26    DOI:

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MICROSTRUCTURE AND MECHANICAL PROPERTIES OF 8090 AI-Li ALLOY

LIU Yulin;ZHANG Yun;ZHAO Hong'en;HU Zhuangqi;SHI Changxu Institute of Metal Research; Academia Sinica; Shenyang Correspondent: HU Zhuangqi; professor; Institute of Metal Research; Academia Sinica

LIU Yulin;ZHANG Yun;ZHAO Hong'en;HU Zhuangqi;SHI Changxu Institute of Metal Research; Academia Sinica; Shenyang Correspondent: HU Zhuangqi; professor; Institute of Metal Research; Academia Sinica. MICROSTRUCTURE AND MECHANICAL PROPERTIES OF 8090 AI-Li ALLOY. Acta Metall Sin, 1991, 27(5): 21-26.

Abstract References Related Articles Recommended Metrics Download:  PDF(1694KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The change of mechanical properties of the 8090 Al-Li alloy influenced by aging is attributed to the change of δ′phase particle size and the precipitation of S′phase. The δ′phase may easily precipitate and rapidly grow, but the S′phase can only precipitate with a longer stage of incubation. The S′phase precipitation would be promoted by cold work prior to aging. The co-precipitation of δ′and S′phases could improve the strength and plasicity of the alloy, for which aging at 190℃ for 20-30 h seems to be optimal. In addition, the precipitate free zone (PFZ) can form at high angle grain boundary and its width is over 200 nm at peak aging condition.But at sub-grain boundary, the formation of PFZ is difficult. Key words:  Al-Li alloy      aging      microstructure      mechanical properties      Received:  18 May 1991      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1991/V27/I5/21 1 张匀,赵洪恩,姚大平,高国忠,陈继志,胡壮麒.金属学报,1989;25:A161 2 Lin F S, Chakrabortty S B, Starke E A Jr. Metall Trans, 1982; 13A: 401 3 Crooks R E, Starke E A Jr. Metall Trans, 1984; 15A: 1367 4 Webster D, Kirkbride R. Metall Trans, 1986; 17A: 2007 5 Venkateswara Rao K T, Ritchie R O. Mater Sci Technol, 1989; 5: 882 6 Srivatsan T S, Plan Place T. J Mater Sci, 1989; 24: 1543 7 Shakesheff A J, McDarmaid D S, Gregson P J. In: Sanders T H Jr., Starke E A Jr. eds., Aluminum-Lithium Alloys, Proc 5th Int Aluminum-Lithium Conf, Williamsburg, Virginia, March 27--31, 1989, Birmingham, UK: Materials and Component Engineering Publications Ltd., 1989: 201 8 Verdu C, Gentzbittel J M, Fourgeres R. 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