Acta Metall Sin  1998, Vol. 34 Issue (9): 945-949    DOI:

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COMPRESSION CREEP BEHAVIOR AND INSTABILITY MECHANISM OF TiAl PST CRYSTALS AT HIGH TEMPERATURE

LIN Jianguo; ZHANG Yonggang; CHEN Changqi (Department of Materials Science and Engineering; Beijing University of Aeronautics and Astronautics; Beijing 100083)Correspondent: Lin Jianguo; postdoctoral; Tel: (010)62017251-7809

LIN Jianguo; ZHANG Yonggang; CHEN Changqi (Department of Materials Science and Engineering; Beijing University of Aeronautics and Astronautics; Beijing 100083)Correspondent: Lin Jianguo; postdoctoral; Tel: (010)62017251-7809. COMPRESSION CREEP BEHAVIOR AND INSTABILITY MECHANISM OF TiAl PST CRYSTALS AT HIGH TEMPERATURE. Acta Metall Sin, 1998, 34(9): 945-949.

Abstract References Related Articles Recommended Metrics Download:  PDF(2066KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The compression creep behavior and creep instability of TiAl PST crystals with three orientations at 800℃ were investigated. The results indicated that the creep resistance of PST crystals is strongly dependent on the anglebetween the lamellar boundaries and loading axis. The creep instability is identified to occur in different ways in the samples with the three orientations. For samples with =90°, the creep instability is associated with the spheroidization of α2 and the formation of the shear band during the creep, it may account for the early onset of the tertiary creep in these oriented samples. Key words:  TiAl alloy      PST crystal      creep behavior      Received:  18 September 1998      Service E-mail this article Add to citation manager E-mail Alert RSS Collect articles（） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1998/V34/I9/945 1 Chesnutt J C. In:Antolovich S D,Stusrud R W , Mackay R A,Anton D L, Khan T, Kissinger R D. Klarstrom D L eds., Superulloys 1992, New York: The Minerals, Metals and Materials Society, 1992; 381 2 Beddoes J, Wallace W, Zhao L. Int Met Mater Rev, 1995; 40: 197 3 Zhang W J, Spigarelli S, Cerri E, Evangelister E, Franceconi L. Mater Sci Eng, 1996; A211: 15 4 Inui H, Oh M H, Nakamura A, Yamaguchi M. Acta Metall Mater, 1992; 27: 1253 5 FujiwaraT;Nakamura A,HosomiM,Nishtani S R,Shira Y,Yamaguchi M. Philos Mag A, 1990;61:591 6 Minonishi Y, OtsukaM; TanakaK. In: Izumi ed.,Intermetallic Compounds. Sendai: The Japan Institute of Metals,1991:543 7 Verhoeven J D. Fundamentals of Phsysical Metallurgy. 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