Acta Metall Sin  1998, Vol. 34 Issue (6): 615-620    DOI:

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EMBRITTLEMENT BEHAVIOR OF 7075 ALUMINUM ALLOY IN LIQUID METAL Ga

LIU Xiaomin; QIAO Lijie; CHU Wuyang(Department of Materials Physics; University of Science and Technology Beijing; Beijing 100083)Coerespondent: LIU Xiaomin; Tel: (010)62332906

LIU Xiaomin; QIAO Lijie; CHU Wuyang(Department of Materials Physics; University of Science and Technology Beijing; Beijing 100083)Coerespondent: LIU Xiaomin; Tel: (010)62332906. EMBRITTLEMENT BEHAVIOR OF 7075 ALUMINUM ALLOY IN LIQUID METAL Ga. Acta Metall Sin, 1998, 34(6): 615-620.

Abstract References Related Articles Recommended Metrics Download:  PDF(1934KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The liquid metal--induced embrittlement(LME) of 7075 aluminum alloy byGa was investigated by using modified WOL notched specimen. The results showed that the adsorption of Ga atoms could facilitate localized plastic deformation of the base metal and there was an observable concave plastic zone around the notch tip. Then a microcrack would initiate when the adsorption -- facilit at ed plastic deformation reached to a crit ical condit ion. The threshold stress intensity factor of LME under the applied tensile stress was 1.7 MPa'ml/2. When the specimen was loaded in the opposite direction(the displacement V <0),a microcrack would initiate in the tensile stress zone away from the notch tip. The microcrack would propagate towards tensile stress zone and arrest at compressive stress zone. The nominal threshold stress intensity factor for the inverse loading was 3.5 MPa'm1/2. The fracture surfaces of LME for all the specimens were intergranular. Key words:  7075 aluminum alloy      liquid metal-induced embrittlement (LME)      Ga      Received:  18 June 1998      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/Y1998/V34/I6/615 1 Nichobo M G,Old C F.J Mater Sci, 1979; 14:1 2 Reynolds A Pistoner G E. Metall Tranus A, 1991; 22: 1849 3 Kargol J A, Albrighy D L. Metall Trans A, 1977; 8: 27 4 Lynch S P Acta Metall 1988;36:2639 5 Chu W Y, Hsiao C M, Wang J W. Metall Trans A, 1985; 16: 1663 6 Su Y J ,Wang Y B ,Chu W Y Sci in Chin E,1997;27:N05 7 Cbu W Y, Liu T H, Hsiao C M. Corrosion , 1981; 37: 320 8 褚武扬.断裂力学基础.北京:科学出版社.1979:163 (Chu W Y.Fundamental of Fracture Mechanism Beijing Science Press ,1979:163) 9 褚武扬.氢损伤与滞后断裂.北京:冶金工业出版社,1988:475 (Chu W Y. 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