Abstract
Influences of the external tension and compression on the morphological changes of γ′ precipitates during coarsening in an Ni-15 at. % Al single crystal were experimentally investigated, and theoretical evalutions on the energetically favourable shape and its orientation were also derived based upon the anisotropic elasticity theory. The shape transformation with growth in size is experimentally found to follow the sequence: cuboid→rod→ plate, under all annealing conditions, i.e. compression-annealing, tension-annealing and external stress-free annealing. However, the external stresses give preferential orientation to such microstructures. The tension of the [001] direction aligns the rods and plates along the tension axis, while the compression aligns them on a plane perpendicular to the compression axis. Theoretical evaluations based upon the anisotropic elasticity for the energetically favourable shapes and orientations of γ′ are consistent with experimental results except in the appearance of rods after compression-annealing. This discrepancy is understood by a conception that the shape transformation is influenced not only by energetics in the elastic strain and interfacial energies, but also by elastic interaction energy.
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References
Y. Nakada and W. C. Leslie, Trans. ASM 60 (1967) 223.
J. M. Obiak and D. F. Paulonis, Met. Trans. 5 (1974) 143.
G. Sauthoff, Z. Metalk. 68 (1977) 500.
T. Eto, A. Sato and T. Mori, Acta Met. 26 (1978) 499.
M. Lauthan, J. Nucl. Mater. 9 (1963) 170.
Idem, Trans. Met. Soc. AIME 227 (1963) 1166.
J. K. Tien and S. M. Copley, Met. Trans 2 (1971) 215, 543.
A. Pineau, Acta Met. 24 (1976) 550.
J. D. Eshelby, Prog. Solid. Mech. 2 (1961) 89.
Idem, Proc. Roy. Soc. A 241 (1957) 376.
E. Hornbogen and M. Roth, Z. Metalk. 58 (1967) 842.
R. G. Davies and N. S. Stoloff, Trans. AIME 233 (1965) 714.
R. O. Williams, ibid 215 (1959) 1026.
J. Kagawa, T. Miyazaki and H. Mori, Trans. Japan Inst. Metals 18 (1977) 707.
A. Chou, A. Datta, G. H. Meier and W. A. Soffa, J. Mater. Sci. 13 (1978) 541.
K. Ono and R. Stern, Trans. Met. Soc. AIME 245 (1969) 171.
H. B. Hontington, Solid Stat. Phys. 7 (1958) 265.
N. Kinoshita and T. Mura, Phys. Stat. Sol. (a) 5 (1971) 759.
S. C. Lin and T. Mura, ibid 15 (1973) 281.
J. K. Lee and D. M. Barnett, Met. Trans. 8A (1977) 96.
A. J. Ardell, Acta Met. 16 (1968) 511.
C. L. Corey and B. Lisowsky, Trans. Met Soc. AIME, 239 (1967) 239.
A. G. Khachaturyan, Phys. Stat. Sol. (a) 26 (1974) 61.
H. Yamauchi, Busseiken-dayori 14 (1974) 24 (in Japanese).
H. Yamauchi and D. de Fontaine, (to be published).
D. Chellman and A. J. Ardell, Acta Met. 22 (1974) 577.
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Formerly at the Graduate School of Nagoya Institute of Technology.
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Miyazaki, T., Nakamura, K. & Mori, H. Experimental and theoretical investigations on morphological changes of γ′ precipitates in Ni -Al single crystals during uniaxial stress-annealing. J Mater Sci 14, 1827–1837 (1979). https://doi.org/10.1007/BF00551021
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DOI: https://doi.org/10.1007/BF00551021