Acta Metall Sin  1994, Vol. 30 Issue (5): 232-238    DOI:

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FACILITATING EFFECT OF ANODIC POLARIZATION ON AMBIENT CREEP OF BRASS

GU Biao; CHU Wuyang; CHU Wei; QIAO Lijie; XIAO Jimei(University of Science and Technology Beijing)(Manuscript received 3 November; 1993; in revised form 20 December; 1993)

GU Biao; CHU Wuyang; CHU Wei; QIAO Lijie; XIAO Jimei(University of Science and Technology Beijing)(Manuscript received 3 November; 1993; in revised form 20 December; 1993). FACILITATING EFFECT OF ANODIC POLARIZATION ON AMBIENT CREEP OF BRASS. Acta Metall Sin, 1994, 30(5): 232-238.

Abstract References Related Articles Recommended Metrics Download:  PDF(517KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The effect of anodic and cathodic polarizations on the ambient creep of brass in 3.5% NaCl and CH_3COOH＋CH_3COONa solutions has been investigated. The results showed that the creep rate in both solutions increased linearly with the increase of the anodic current density and was approximately inversely proportional to the square of radius of the specimen. The dε/dt in 3.5%　NaCl solution was much higher than that in CH_3COOH＋CH_3COONa solution at the same anodic current density. The creep rate resulting from dislocation climb induced by vacancy supersaturation during the anodic polarization has been calculated as follows:dε/ dt = Aβi / r2whereA=8παMρDs△t(2△r)(1/2)／c0dFZln(L／), and β is a constant related to the degree of dezincification. The experimental data support the proposed mechanism. Cathodic polarization could also increase the ambient creep of brass by a mechanism related to hydrogen-facilitated local plastic deformation. Corresponaent; GU Buao,Department of Materials Physics, University of Science and Technology Beijing,Beijing 100083 Key words:  ambient creep      brass      anodic polarization      Received:  18 May 1994      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/Y1994/V30/I5/232 1KramerI．TransMetallSocAIME,1963;227:10032RevieRW,UhligHH．ActaMetall,1974;24:6193RevieRW,UhligHH．CorrosionSci,1972;12:6694UhligHH．JElecSci,1976;123:16695罗丙清,吕明,曹楚南．新材料研究,第二届中国材料研讨会,武汉,1988:3676SmialowskiM,KostanskiJ．CorrosSci,1979;19:10197PetitMC．DesjardiusD．In:StaehleRWed．,SCCandHEofIron-BaseAlloys,HostonNACE．TX,1977:12048黄彦良．博士论文,中国科学院金属腐蚀与防护研究所,19939HirthJP．TheoryofDislocation．2ndEd,NewYork:Wiley,1982,61910GalveleJR．CorrosSci,1987;27:111KiritaniM,YoshidaN,TakataH,MaeharaY．JPhysSocJpn,1977;38:196712FriedelJ．Distocations．NewYork:Pergamon,1964,8913SangC,ChuWY,HsiaoCM．ScrMetallMater．1991;25:275114LiJCM,ParkCG,OhrSM．ScrMetall．1986;20:37115褚武扬．氢损伤与滞后断裂,北京:冶金工业出版社,198816褚武扬,丁威,肖纪美．金属学报,1986;22:A115 [1] XUE Yingyu, TANG Jiancheng, ZHUO Haiou, YE Nan, WU Tong, ZHOU Xusheng. 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