Effect of Strain Rate on Plastic Deformation Behavior of Y-CSZ Single Crystal

Deock-Soo Cheong; Chang Sam Kim

Korean Journal of Materials Research, Vol.20, No.1, 7-11, January, 2010

DOI10.3740/MRSK.2010.20.1.007 Export Citation

Effect of Strain Rate on Plastic Deformation Behavior of Y-CSZ Single Crystal

Deock-Soo Cheong, and Chang Sam Kim^{1, †}

Department of Materials Science and Engineering,, Dankook University, Cheonan, Chungnam 330-714, Korea
¹Battery Research Center, Korea Institute of Science and Technology, Seoul 136-791, Korea

E-mail:

Yttria stabilized zirconia (Y-CSZ) single crystals show plastic deformation at high temperatures by activating dislocations. The effect of strain rate on the plastic behavior of this crystal was studied. As increasing strain rate from ε = 1.04 × 10-5 sec-1 to 2.08 × 10-5 sec-1 the yield drop was suppressed and resulted in higher Young's modulus and yield stress. Dislocation structures of the strained crystals were analyzed using a transmission electron microscope to elucidate the plastic behavior of these crystals. In the early stage of plastic deformation, dislocation dipoles and prismatic dislocation loops were formed in both samples. However, dislocation density was increased by increasing strain rate. Strong sessile dislocations were observed in the sample with higher strain rate, which may cause the higher work hardening.

Keywords:yttria stabilized zirconia;plastic deformation;dislocations;yield stress;strain rates

[References]

Fries E, Guiberteau F, Dominguez-Rodriguez A, Cheong DS, Heuer AH, Phil. Mag. A, 60(1), 107 (1989)
Dominguez-Rodriguez A, Cheong DS, Heuer AH, Phil. Mag. A, 64(4), 923 (1991)
Cheong DS, Dominguez-Rodriguez A, Heuer AH, Phil. Mag. A, 60(1), 123 (1989)
Johnston WG, J. Appl. Phys., 33(9), 2050 (1962)
Hirsch PB, Howie A, Nicholson RB, Pashley DW, Whelan MJ, Electron Microscopy of Thin Crystals', Robert E. Krieger Pub. Co., Huntington, N.Y., USA (1977). (1977)
Ingel RP, Lewis D, Bauer BA, Rice RW, J. Am. Ceram. Soc., 65(108), 1203 (1982)
Amelincx S, Dekeyser WJ, J. Appl. Phys., 29, 1000 (1958)
Gilman JJ, Johnston WG, Solid State Physics, 13 (1963)
Hirsch PB, Mitchell TE, Work Hardening of Metals, ed. Hirth JP, Weertman J, Gordon and Beach Science Publishers, Inc., N. Y., USA (1968). (1968)
Teleman AS, Acta. Met., 10(9), 813 (1962)
Yust CS, MaHargue CJ, J. Nucl. Mat., 31, 121 (1969)
Pletka BJ, Mitchell TE, Heuer AH, J. Am. Ceram. Soc., 57(9), 388 (1974)
Segall RL, Partridge PG, Hirsch PB, Phil. Mag., 6, 1493 (1961)
Cheong DS, Thesis PD, C. W. R. U., Cleveland, Ohio (1989). (1989)
Gilman JJ, Johnston WG, Dislocations and Mechanical Properties of Crystals, p.116, Wiley, N.Y., USA (1956). (1956)

[1] Fries E, Guiberteau F, Dominguez-Rodriguez A, Cheong DS, Heuer AH, Phil. Mag. A, 60(1), 107 (1989)

[2] Dominguez-Rodriguez A, Cheong DS, Heuer AH, Phil. Mag. A, 64(4), 923 (1991)

[3] Cheong DS, Dominguez-Rodriguez A, Heuer AH, Phil. Mag. A, 60(1), 123 (1989)

[4] Johnston WG, J. Appl. Phys., 33(9), 2050 (1962)

[5] Hirsch PB, Howie A, Nicholson RB, Pashley DW, Whelan MJ, Electron Microscopy of Thin Crystals', Robert E. Krieger Pub. Co., Huntington, N.Y., USA (1977). (1977)

[6] Ingel RP, Lewis D, Bauer BA, Rice RW, J. Am. Ceram. Soc., 65(108), 1203 (1982)

[7] Amelincx S, Dekeyser WJ, J. Appl. Phys., 29, 1000 (1958)

[8] Gilman JJ, Johnston WG, Solid State Physics, 13 (1963)

[9] Hirsch PB, Mitchell TE, Work Hardening of Metals, ed. Hirth JP, Weertman J, Gordon and Beach Science Publishers, Inc., N. Y., USA (1968). (1968)

[10] Teleman AS, Acta. Met., 10(9), 813 (1962)

[11] Yust CS, MaHargue CJ, J. Nucl. Mat., 31, 121 (1969)

[12] Pletka BJ, Mitchell TE, Heuer AH, J. Am. Ceram. Soc., 57(9), 388 (1974)

[13] Segall RL, Partridge PG, Hirsch PB, Phil. Mag., 6, 1493 (1961)

[14] Cheong DS, Thesis PD, C. W. R. U., Cleveland, Ohio (1989). (1989)

[15] Gilman JJ, Johnston WG, Dislocations and Mechanical Properties of Crystals, p.116, Wiley, N.Y., USA (1956). (1956)