Acta Metall Sin  1990, Vol. 26 Issue (3): 5-9    DOI:

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SLIP FEATURE AND GRAIN BOUNDARY BEHAVIOURS OF Ni_3 Al ALLOYS DURING DEFORMATION

LIN Dongliang;CHEN Da T. L. Lin Shanghai Jiaotong University ;professor;Deportment of Materials Science;Shanghai Jiactong University; Shanghai 200030

LIN Dongliang;CHEN Da T. L. Lin Shanghai Jiaotong University ;professor;Deportment of Materials Science;Shanghai Jiactong University; Shanghai 200030. SLIP FEATURE AND GRAIN BOUNDARY BEHAVIOURS OF Ni_3 Al ALLOYS DURING DEFORMATION. Acta Metall Sin, 1990, 26(3): 5-9.

Abstract References Related Articles Recommended Metrics Download:  PDF(1718KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The deformation behaviours of Ni_3Al alloys with various chemicalcompositions and subjected to different heat treatments were in situ observed underSEM. Moreover, in situ observations of slip trace were supplemented by the directobservation of dislocation arrangements under TEM. In B-doped Ni_3Al alloys it isshown that close to the grain boundary there exists a thin slip transition region,within which slip lines are reoriented or other slip systems are operated to producea local strain accommodation and to relax the stress concentration at grain bound-aries. Boron seems to lower the stress for dislocation generation from the grainboundary or to ease the cross-slip close to the boundary,and also to increase the numberof dislocation sources. However, B-enhenced ductility is seriously affected by alloystoichiometry, the addition of a tertiary alloy element and heat treatment, etc. Key words:  Ni_3Al      intermetallic compound      deformation      slip      dislocation      Received:  18 March 1990      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/Y1990/V26/I3/5 1 Koch C C, Liu C T, Stoloff N S. Proc. of Symp. on High Temperature Ordered Intermetallic Alloys, MRS, 1985 and 1987 2 Stoloff N S. Int Met Rev, 1984; 29: 123 3 Liu C T, White C L, Horton J A. Acta Metall, 1985; 33: 213 4 Liu C T. White C L. Proc Materials Research Society Symposium on High Temperature Ordered Intermetallic Alloy, Boston, MA, Nov. 26--30, 1984, Vo1． 39: 365--380 5 Shulson E M, Weihs T P, Baker I, Frost H J, Horton J A. Acta Metall, 1986; 34: 1395 6 Bond G M, Robertson I M, Birnbaum H K. 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