Acta Metall Sin  1995, Vol. 31 Issue (23): 477-483    DOI:

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IN SITU TEM OBSERVATION OF DISLOCATION EMISSION,MOTION AND SCC INITIATION IN Ti_3Al+Nb UNDER METHANOL CORROSION

GAO Kewei;CHU Wuyang;XIAO Jimei(University of Science and Technology Beijing;Beijing 100083)(Manuscript received 1995-02-27)

GAO Kewei;CHU Wuyang;XIAO Jimei(University of Science and Technology Beijing;Beijing 100083)(Manuscript received 1995-02-27). IN SITU TEM OBSERVATION OF DISLOCATION EMISSION,MOTION AND SCC INITIATION IN Ti_3Al+Nb UNDER METHANOL CORROSION. Acta Metall Sin, 1995, 31(23): 477-483.

Abstract References Related Articles Recommended Metrics Download:  PDF(629KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The in situ TEM observations of dislocation emission,motion and initiation of nanocrack in Ti_3Al+Nb under methanol corrosion were carried out.Using a special constant displacement device,the dislocation coniguration change ahead of a loaded crack tip before and after anodic dissolution in methanol and the initiation,propagation of nanometre scale stress corrosion cracks have been observed.The results showed that localized anodic dissolution of Ti_3Al+Nb in methanol at room temperature facilitated dislocation emission,multiplication and motion.A nanocrack initiated in the dislocation free zone or at the blunted crack tip after dislocation emission, multiplication and motion reached a critical condition. Key words:  Ti_3Al+Nb      dislocation emission      stress corrosion crack      TEM in situ observation      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/Y1995/V31/I23/477 1UhligHH．JElectrochemSoc,1976;123:16992RevieRW,UhligHH．ActaMetall,1974;22:6193SmialowskiM,KostanskingJ．CorrosSci,1979;19:10194Gu8,ChuWY,QiaoLJ,HsiaoCM,ScrMetallMater,1994;31:1615黄彦良,曹楚南,林海潮.金属学报,1993,29:B2126魏学军,周向阳,柯伟,金属学报,1993;29:B2697KanfmanMJ,FinkJI．ActaMetal,1985;36:22138褚武扬.氢损伤与滞后断裂.北京:冶金工业出版社,1988:3619张跃,褚武扬,王燕斌.乔利杰,肖纪美.金属学报,1994;30:A3510MagninT,ChieragattiR,OltraR．ActaMetallMater,1990;38:13l311JonesDAMetallTrans,1985;16A:113312黄一中,陈奇志,袁昌言,褚武扬.金属学报,1994;30:B45313RiceJR,ThomsonR．PhilosMag,1974,29:7314陈奇志,褚武扬,肖纪美,中国科学,1994;A24:115高克玮,陈奇志,褚武扬,肖纪美.中国科学,1994,A24:99316张跃,褚武扬,王燕斌,肖纪美.中国科学,1994,A24．55117OhrSM．MaterSciEng,1985;72:118谷飘,张静武,万发荣,褚武扬.金属学报,1995,31:A15619ZhangY,WangYB,ChuWY,HsiaoCM．ScrMetallMater,1992;26:926 [1] CHANG Litao. 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