Abstract
Neutron diffraction measurements of internal elastic strains and crystallographic orientation were performed during compressive deformation of martensitic NiTi containing 0 vol pct and 20 vol pct TiC particles. For bulk NiTi, some twinning takes place upon initial loading below the apparent yield stress, resulting in a low apparent Young's modulus; for reinforced NiTi, the elastic mismatch from the stiff particles enhances this effect. However, elastic load transfer between matrix and reinforcement takes place above and below the composite apparent yield stress, in good agreement with continuum mechanics predictions. Macroscopic plastic deformation occurs by matrix twinning, whereby (1 0 0) planes tend to align perpendicular to the stress axis. The elastic TiC particles do not alter the overall twinning behavior, indicating that the mismatch stresses associated with NiTi plastic deformation are fully relaxed by localized twinning at the interface between the matrix and the reinforcement. For both bulk and reinforced NiTi, partial reverse twinning takes place upon unloading, as indicated by a Bauschinger effect followed by rubberlike behavior, resulting in very low residual stresses in the unloaded condition. Shape-memory heat treatment leads to further recovery of the preferred orientation and very low residual stresses, as a result of self-accommodation during the phase transformations. It is concluded that, except for elastic load transfer, the thermal, transformation, and plastic mismatches resulting from the TiC particles are efficiently canceled by matrix twinning, in contrast to metal matrix composites deforming by slip.
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References
J. Perkins:Met. Forum, 1981, vol. 4, pp. 153–63.
T. Saburi and S. Nenno: inSolid-Solid Phase Transformations, H.I. Aaronson, D.E. Laughlin, R.F. Sekerka, and C.M. Wayman, eds., TMS-AIME, Warrendale, PA, 1982, pp. 1455–79.
K. Otsuka and K. Shimizu:Int. Met. Rev., 1986, vol. 31, pp. 93–114.
K. Shimizu and T. Tadaki: inShape Memory Alloys, H. Funakubo, ed., Gordon and Breach, New York, NY, 1987, pp. 1–60.
T. Honma: inShape Memory Alloys, H. Funakubo, ed., Gordon and Breach, New York, NY, 1987, pp. 61–115.
C.M. Wayman and J.D. Harrison:J. Met., 1989, vol. 41, pp. 26–28.
E. Hombogen: inProgress in Shape Memory Alloys, S. Euken, ed., DGM, Oberursel, Germany, 1992, pp. 3–19.
C.M. Wayman:MRS Bull, 1993, vol. 18, pp. 49–56.
D. Mari and D.C. Dunand:Metall. Mater. Trans. A, 1995, vol. 26A, pp. 2833–47.
K.L. Fukami-Ushiro, D. Mari, and D.C. Dunand:Metall. Mater. Trans. A, 1996, vol. 27A, pp. 183–191.
K.L. Fukami-Ushiro and D.C. Dunand:Metall. Mater. Trans. A, 1996, vol. 27A, pp. 193–203.
D. Mari, L. Bataillard, D.C. Dunand, and R. Gotthardt:J. Phys IV, 1995, vol. 5, pp. 659–664.
I.C. Noyan and J.B. Cohen:Residual Stress, Springer-Verlag, New York, NY, 1987, pp. 63–116.
M.T. Hutchings: inMeasurement of Residual and Applied Stress Using Neutron Diffraction, M.T. Hutchings and A.D. Krawitz, eds., Kluwer, Dordrecht, 1992, pp. 3–18.
A.D. Krawitz: inMeasurement of Residual and Applied Stress Using Neutron Diffraction, M.T. Hutchings and A.D. Krawitz, eds., Kluwer, Dordrecht, 1992, pp. 405–20.
G.E. Bacon:Neutron Diffraction, Oxford University Press, Oxford, United Kingdom, 1962, pp. 72–73.
M.A.M. Bourke, J.A. Goldstone, M.G. Stout, A.C. Lawson, and J.E. Allison: inResidual Stresses in Composites: Measurement Modeling and Effects on Thermomechanical Behavior, E.V. Barrera and I. Dutta, eds., TMS, Warrendale, PA, 1993, pp. 67–77.
M.A.M. Bourke, J.A. Goldstone, N. Shi, J.E. Allison, M.G. Stout, and A.C. Lawson:Scripta Metall. Mater., 1993, vol. 29, pp. 771–76.
J.A. Goldstone: Los Alamos National Laboratory, Los Alamos, NM, private communication, 1990.
R.B. Von Dreele, J.D. Jorgensen, and C.G. Windsor:J. Appl. Crystal, 1982, vol. 15, pp. 581–89.
A.C. Larson and R.B. Von Dreele: Los Alamos National Laboratory Report No. LA-UR 86-748, Los Alamos, NM, 1986.
CM. Jackson, H.J. Wagner, and R.J. Wasilewski: NASA-SP 5110, 1972, p. 49.
The CRC Materials Science and Engineering Handbook, J. Shackelford and W. Alexander, eds., CRC Press, Boca Raton, FL, 1992, pp. 358–436.
Y. Kudoh, M. Tokohami, S. Miyazaki, and K. Otsuka:Acta Metall., 1985, vol. 33, pp. 2049–56.
W. Bührer, R. Gotthardt, A. Kulik, and O. Mercier:J. Phys., 1982, vol. 43, pp. 219–24.
A.A. Golestaneh and J.M. Carpenter:Acta Metall. Mater., 1990, vol. 38, pp. 1291–1305.
J.W. Hutchinson and R.M. McMeeking: inFundamentals of Metal Matrix Composites, S. Suresh, A. Mortensen, and A. Needleman, eds., Butterworth-Heinemann, Boston, MA, 1993, pp. 158–73.
P.E. McHugh, R.J. Asaro, and C.F. Shih: inFundamentals of Metal Matrix Composites, S. Suresh, A. Mortensen, and A. Needleman, eds., Butterworth-Heinemann, Boston, MA, 1993, pp. 139–57.
T.W. Clyne and P.J. Withers:An Introduction to Metal Matrix Composites, Cambridge University Press, Cambridge, United Kingdom, 1993, pp. 44–165.
T.M. Brill, S. Mittelbach, W. Assmus, M. Mullner, and B. Luthi:J. Phys.: Condens. Mater., 1991, vol. 3, pp. 9621–27.
S. Spinner and A.G. Rozner:J. Acoust. Soc. Am., 1966, vol. 40, pp. 1009–15.
W. Bührer, R. Gotthardt, and M.S. Wechsler: inInt. Conf. on Martensitic Transformations, Japan Institute of Metals, Sendai, 1986, pp. 687–702.
D.C. Dunand: inThe Encyclopedia of Advanced Materials, D. Bloor, R.J. Brook, M.C Flemings, and S. Mahajan, eds., Pergamon Press, Elmsford, NY, 1994, pp. 1502–07.
M.A.M. Bourke, J.A. Goldstone, M.G. Stout, and A. Needleman: inFundamentals of Metal Matrix Composites, S. Suresh, A. Mortensen, and A. Needleman, eds., Butterworth-Heinemann, Boston MA, 1993, pp. 61–80.
R. Chang and L.J. Graham:J. Appl. Phys., 1966, vol. 37, pp. 3778–83.
P.B. Prangneil, T. Downes, W.M. Stobbs, and P.J. Withers:Acta Metall. Mater., 1994, vol. 42, pp. 3425–36.
A.J. Allen, M.A.M. Bourke, S. Dawes, M.T. Hutchings, and P.J. Withers:Acta Metall. Mater., 1992, vol. 40, pp. 2361–73.
C.A. Lewis, W.M. Stobbs, and P.J. Withers:Mater. Sci. Eng., 1993, vol. A171,pp. 1–11.
T. Onda, Y. Bando, T. Ohba, and K. Otsuka:Mater. Trans. JIM, 1992, vol. 33, pp. 354–59.
K. Otsuka, T. Tamura, and K. Shimizu:Phys. Status Solidi, 1971, vol. 5, pp. 457–70.
S.P. Gupta and A.A. Johnson:Trans. Jpn. Inst. Met., 1973, vol. 14, pp. 292–302.
O. Matsumoto, S. Myiazaki, K. Otsuka, and H. Tamura:Acta Metall., 1987, vol. 35, pp. 2137–44.
B.A. Bilby and A.G. Crocker:Proc. R. Soc. Lond., 1965, vol. 288A, pp. 240–55.
K.M. Knowles and D.A. Smith:Acta Metall., 1981, vol. 29, pp. 101–10.
K. Mandagopal, J. Singh, and S. Banerjee:Scripta Metall. Mater., 1991, vol. 25, pp. 2153–58.
M.F. Ashby: in2nd Int. Conf. on the Strength of Metals and Alloys, Pacific Grove, CA, ASM, Metals Park, OH, 1970, pp. 507–41.
M.F. Ashby:Phil. Mag., 1970, vol. 21, pp. 399–424.
R.J. Wasilewski: inShape Memory Effects in Alloys, J. Perkins ed., Plenum Publishing, NY, 1975, pp. 245–71.
J.F. Nye:Physical Properties of Crystals, Oxford University Press, Oxford, United Kingdom, 1985.
J.D. Eshelby:Proc. R. Soc. Lond., 1957, vol. A241, p. 376.
P.J. Withers, W.M. Stobbs, and O.B. Pedersen:Acta Metall., 1989, vol. 37, pp. 3061–84.
H.J. Frost and M.F. Ashby:Deformation-Mechanism Maps: The Plasticity and Creep of Metals and Ceramics, Pergamon Press, Elmsford, NY, 1982, p. 166.
ASM Handbook: Alloy Phase Diagrams, ASM, Materials Park, OH, 1992, p. 319.
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Dunand, D.C., Mari, D., Bourke, M.A.M. et al. NiTi and NiTi-TiC composites: Part IV. Neutron diffraction study of twinning and shape-memory recovery. Metall Mater Trans A 27, 2820–2836 (1996). https://doi.org/10.1007/BF02652374
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DOI: https://doi.org/10.1007/BF02652374