Acta Metall Sin  1990, Vol. 26 Issue (2): 57-63    DOI:

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FRACTURE MECHANISM OF PRE-DEFORMATION-AGED Al-2.73Li ALLOY

SUN Dongli;YANG Dezhuang;CUI Yuexian;LEI Tingquan Harbin Institute of Technology Faculty 921;Department No.9; Harbin Institute of Technology; Harbin 150006

SUN Dongli;YANG Dezhuang;CUI Yuexian;LEI Tingquan Harbin Institute of Technology Faculty 921;Department No.9; Harbin Institute of Technology; Harbin 150006. FRACTURE MECHANISM OF PRE-DEFORMATION-AGED Al-2.73Li ALLOY. Acta Metall Sin, 1990, 26(2): 57-63.

Abstract References Related Articles Recommended Metrics Download:  PDF(2092KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The fracture mechanism of deformation-aged Al-Li alloy was approach-ed by investigating the influence of prior cold deformation on the precipitationkinetics as well as the behaviours of work hardening and fracture for Al-2.73 Lialloy. The experimemal results show that the work hardening rate and thestrength are increased and the ductility is decreased by prior cold defromation.The decrease in ductility is mainly due to the cell dislocation substructure distri-buted inhomogeneously and the hardening of precipitates free zones at grain bound-aries caused by prior cold deformation. The failure mode in the alloy is a mixedintergranular and transgranular fracture. The tendency of intergranular fracture isintensified through the deformation-aging. The mechanisms of intergranular failurein the alloy are different under various deformation-aging treatments Key words:  Al-Li alloy      deformation-aging      precipitation      strengthening      fracture      Received:  18 February 1990      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/Y1990/V26/I2/57 1 Starke E A Jr., Sanders T H Jr. Aluminium-Lithium Alloys, TMS-AIMS, 1981 2 Starke E A Jr., Sanders T H Jr. Aluminium-Lithium Alloys II, TMS AIME, 1984 3 Baker C, Gregson P J, Harris S J, Pell C J, Aluminium-Lithium Alloys III, London: The Institute of Metals, 1986 4 Furulawa M, Miura Y, Nemoto M. 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