Acta Metall Sin  1991, Vol. 27 Issue (1): 39-43    DOI:

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ANOMALOUS TENSILE FRACTURE BEHAVIOUR OF AN Al-Li-Zn-Zr ALLOY AT ROOM TEMPERATURE AND UNDER LOW TEMPERATURES

JIANG Xiaojun;YAO Daping;LI Yiyi Institute of Metal Research; Academia Sinica; Shenyang

JIANG Xiaojun;YAO Daping;LI Yiyi Institute of Metal Research; Academia Sinica; Shenyang. ANOMALOUS TENSILE FRACTURE BEHAVIOUR OF AN Al-Li-Zn-Zr ALLOY AT ROOM TEMPERATURE AND UNDER LOW TEMPERATURES. Acta Metall Sin, 1991, 27(1): 39-43.

Abstract References Related Articles Recommended Metrics Download:  PDF(1378KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The tensile properties and fracture behaviour of an Al-Li-Zn-Zr alloyhave been investigated in the temperature range of 295 to 77 K. The ultimatestrength and elongation increase with decreasing temperature, whereas the yieldstrength remains merely unchanged. Its fracture is transgranular obviously at roomtemperature, but it appears mainly as intergranular mode at 77 K. The deformationmode near the fracture surface is similar at both ambient and cryogenic tempera-tures. However, at room temperature, the ftacture of the alloy is mainly concernedwith the planar slipping, which may be weakened markedly at 77 K, and at thesame time, the fracture behaviour of the alloy is dependent on the interaction betweenslip bands and grain boundaries. Key words:  Al-Li alloy      tensile properties      fracture behaviour      Received:  18 January 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/I1/39 1 Webster D. In: Baker C, Gregson P J, Harris S J, Peel C J eds., Aluminium-Lithium Alloys III, Proc 3rd Int Aluminium-Lithium Conference. University of Oxford, 8--11 July. 1985, The Institute of Metals. London, 1986: 602 2 Dorward R C. Scr Metall, 1986; 20: 1379 3 Glazer J, Verzasconi S L, Sawtell R R, Morris J W Jr. Metall Trans, 1987; 18A: 1695 4 Welpmann K, Lee Y T, Peters M. 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: 1513 5 Dew-Hughes D. Creed E, Miller W S. Mater Sci Technol, 1988; 4: 106 6 Morris J W Jr., Glazer J. 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