Acta Metall Sin  1996, Vol. 32 Issue (3): 289-293    DOI:

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EFFECT OF PREOXIDATION ON DUCTILITY OF Ni_3Al BASE ALLOYS AT ELEVATED TEMPERATURE

YE Changiiang; LI Tiefan(State Key Laboratory for Corrosion and Protection; Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences; Shenyang 110015 )( Jinan University; Guangzhou 510632 )(Manuscript received 1 995-0 1-27; in revised form 1995-08-09)

YE Changiiang; LI Tiefan(State Key Laboratory for Corrosion and Protection; Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences; Shenyang 110015 )( Jinan University; Guangzhou 510632 )(Manuscript received 1 995-0 1-27; in revised form 1995-08-09). EFFECT OF PREOXIDATION ON DUCTILITY OF Ni_3Al BASE ALLOYS AT ELEVATED TEMPERATURE. Acta Metall Sin, 1996, 32(3): 289-293.

Abstract References Related Articles Recommended Metrics Download:  PDF(428KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The fine-grained Ni-11 .82Al-1 .03Zr-0. 1B alloy formed Ni-rich oxide layer after preoxidized in air at 1000℃ for 15 min. This kind of preoxidation caused a severe embrittlement at 600℃ in air, and did not affect the ductility under vacuum. When the environment of preoxidation changed from air to argon atmosphere (po2 =10-1 Pa), the oxidation rate constant decreased by a factor of 103, but the oxidation rate constant for Al is expected to be independent of the externally applied oxygen partial pressure. Free energy of the formation for Al2O3 is more negative than that for NiO. The preoxidation at the argon atmosphere , by which Al-rich oxide layer formed on the large-grain specimens, retarded the embrittlement in air, but caused a ductility loss under vacuum. Correspondent: LI Tiefan, professor, Institute of Corrosion and Protection of Metals, Chinese Academy of Sciences, Shenyang 110015 Key words:  preoxidation      Ni-rich oxide layer      Al-rich oxide layer      dynamic embrittlement      Received:  18 March 1996      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/Y1996/V32/I3/289 1LiuCT,WhiteC．ActaMetall,1987;35:6432TakeyamaM,LiuC．ActaMetall．1989;37:26813TakeyamaM,LiuCT．ScrMetall．1989;23:7274FuekiK,WagnerJB．JElectrochemSoc,1965;112:3845叶长江,李铁藩.金属学报,1995;31:B109& [1] ZHU Jiahong;WAN Xiaojing(Shanghai University of Technology)(Manuscript received 1 April;1993;in revised form 8 July;1993). ENVIRONMENTAL EMBRITTLEMENT IN Fe_3Al BASED ALLOYS[J]. 金属学报, 1994, 30(3): 139-144. No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed