Acta Metall Sin  1993, Vol. 29 Issue (8): 37-43    DOI:

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EFFECT OF Ag ON TENSILE FRACTURE OF NATURAL AGED Al-Li-Cu-Mg-Zr ALLOY

JIANG Xiaojun;LI Yiyi;SHI Changxu Institute of Metal Research; Academia Sinica; ShengyangPh.D Institute of Metal Research; Academia Sinica; Shenyang 110015

JIANG Xiaojun;LI Yiyi;SHI Changxu Institute of Metal Research; Academia Sinica; ShengyangPh.D Institute of Metal Research; Academia Sinica; Shenyang 110015. EFFECT OF Ag ON TENSILE FRACTURE OF NATURAL AGED Al-Li-Cu-Mg-Zr ALLOY. Acta Metall Sin, 1993, 29(8): 37-43.

Abstract References Related Articles Recommended Metrics Download:  PDF(2482KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The tensile properties and fracture characteristics of threeAl-Li-Cu-Mg-Zr(-Ag) alloys in the natural aged temper have been studied over the tem-perature range of 77--290 K. Results show that the tensile strength and ductility of the alloyssignificantly increased with the decrease of test temperature from 153 to 77 K, except theelongation of the alloy free of Ag, which kept nearly constant for the entire temperaturerange. Planar slip behavior and transgranular shear fracture are the predominant mode forthree alloys when testing at room temperature. At cryogenic temperatures, the alloys have atendency to cracking along grain boundaries, and show different tensile behavior, i.e., theoverall deformation distribution looks fairly uniform for the alloys containing Ag, in whichthe increase of cryogenic ductility may be attributed to the homogeneous deformation. Key words:  Al-Li alloy      tensile property      fracture behaviour      minor additions      Ag      Received:  18 August 1993      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/Y1993/V29/I8/37 1 Webster D. Metall Trans A, 1987; 18: 2181． 2 Dorward R C. Scr Metall, 1986; 20: 1379． 3 Glazer J, Verzasconi S L, Sawtell R R, Morris J W Jr. Metall Trans A, 1987; 18: 1695． 4 Welpmann K, Lee Y T, Peters M. Mater Sci Eng, 1990; A129:21． 5 蒋晓军、姚大平、李依依,金属学报,1991;27:A39 6 Jiang X J, Li Y Y, Adv Cryo Eng (Mater), 1991; 38:29． 7 Dew--Hughes D, Creed E. Miller W S. Mater Sci Technol., 1988; 4: 106． 8 蒋晓军,中国科学院金属研究所博士论文,1993 9 Baumann S F, Williams D B. 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