Coherency and loss of coherency in lamellar TiAl

作者: P.M. Hazzledine

DOI: 10.1016/S0966-9795(98)00034-X

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摘要: A grain of fully lamellar TiAl is modeled as a periodic multilayer which may contain any number layers, each with different lattice parameters, (isotropic) elastic constants and thicknesses. Formulae are given for the coherence (plane) stress strain tensors in layer. The γ layers all have inplane shears biaxial tension whereas α2 principally compression. stresses expected various forms coherent tabulated. Estimates made thicknesses at material becomes semi- or partially- residual these materials.

参考文章(5)
J. W. Matthews, Misfit dislocations in screw orientation Philosophical Magazine. ,vol. 29, pp. 797- 802 ,(1974) , 10.1080/14786437408222071
J Matthews, Defects in epitaxial multilayers I. Misfit dislocations Journal of Crystal Growth. ,vol. 27, pp. 118- 125 ,(1974) , 10.1016/0022-0248(74)90424-2
M YAMAGUCHI, Y UMAKOSHI, The deformation behaviour of intermetallic superlattice compounds Progress in Materials Science. ,vol. 34, pp. 1- 148 ,(1990) , 10.1016/0079-6425(90)90002-Q
T. Nakano, A. Yokoyama, Y. Umakoshi, Effect of Nb addition on the plastic behavior of TiAl crystals containing oriented lamellae Scripta Metallurgica Et Materialia. ,vol. 27, pp. 1253- 1258 ,(1992) , 10.1016/0956-716X(92)90066-N
Bimal K. Kad, Peter M. Hazzledine, Shear boundaries in lamellar TiAl Philosophical Magazine Letters. ,vol. 66, pp. 133- 139 ,(1992) , 10.1080/09500839208229275