Abstract
The creep deformation of Mar-M200 single crystals of various orientations has been studied at a temperature of 1400°F. It was found by a combination of transmission microscopy and analysis of lattice rotations that shear of the γ−γ′ structure occurs by the glide of loosely coupled intrinsic/extrinsic fault pairs with a net Burgers vector ofa <112>. The orientation dependencies of both the rate and extent of primary creep are correlated with the Schmid factors and multiplicity of slip for {111}<112> systems. It is also shown that strain hardening due to intersecting slip is necessary to obtain the transition from primary to steady-state creep. In addition, it was found that the deformation mode is a function of strain rate at 1400°F. In contrast to the observed glide mechanism during creep, tensile deformation occurs by the shear of the γ and γ′ phases bya/2 <110> superlattice pairs.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
W. Betteridge and A. W. Franklin:J. Inst. Metals, 1956–57, vol 85, p. 473.
D. McLean:J. Inst. Metals, 1956–57, vol. 85, p. 468.
C. W. Weaver:J. Inst. Metals, 1959–60, vol. 88, p. 296.
R. F. Decker, J. P. Rowe, and J. W. Freeman: National Advisory Committee for Aeronautics, Report 1392, 1960.
J. Heslop:J. Inst. Metals, 1962–63, vol. 91, p. 28.
E. L. Raymond:Trans. TMS-AIME, 1967, vol. 239, p. 1415.
G. A. Webster and B. J. Piearcey:Trans. Quart. ASM, 1966, vol. 59, p. 847.
G. A. Webster and C. P. Sullivan:J. Inst. Metals, 1967, vol. 95, p. 138.
P. W. Davies and H. E. Evans:J. Inst. Metals, 1968, vol. 96, p. 245.
C. P. Sullivan, G. A. Webster, and B. J. Piearcey:J. Inst. Metals, 1968, vol. 96, p. 274.
P. W. Davies, D. Sidey, and B. Wilshire:J. Inst. Metals, 1969, vol. 97, p. 15.
D. Sidey and B. Wilshire:Met. Sci. Jour., 1969, vol. 3, p. 56.
F. L. VerSnyder, R. B. Barrow, B. J. Piearcey, and L. W. Sink:Trans. Am. Found. Soc., 1969, vol. 55, p. 10.
O. H. Kriege and J. M. Baris:Trans. Quart. ASM, 1969, vol. 62, p. 195.
R. K. Penny, E. G. Ellison, and G. A. Webster:Mater. Res. Std., 1966, vol. 6, p. 76. Also see, D. N. Tishler and C. H. Wells,Ibid. Mater. Res. Std., 1966, vol. 6, p. 20.
B. H. Kear and M. F. Hornbecker:Trans. Quart. ASM, 1967, vol. 60, p. 644.
B. H. Kear, G. R. Leverant, and J. M. Oblak:Trns. Quart. ASM, 1969, vol. 62, p. 639.
E. Schmid and W. Boas:Plasticity of Crystals, p. 57, F. A. Hughes and Co., London, 1950.
H. I. L. Huang, O. D. Sherby, and J. E. Dorn: AIME Trans., 1956, vol. 206, p. 1385.
S. M. Copley and B. H. Kear:Trans. TMS-AIME, 1967, vol. 239, p. 984.
J. B. Wachtman, Jr:Creep of Crystalline Nonmetals, Creep and Recovery, p. 344, ASM, Cleveland, Ohio, 1957.
H. L. Burghoff and C. H. Mathewson:AIME Trans. 1941, vol. 143 p. 45.
W. G. Johnston:J. Appl. Phys., 1962, vol. 33, p. 2716.
E. A. Calnan and C. J. B. Clews:Phil. Mag., 1951, vol. 42, p. 616.
P. R. Paslay, C. H. Wells, and G. R. Leverant: Accepted for publication inJ. App. Mech.
J. Weertman:J. Appl. Phys, 1957, vol. 28, p. 1185.
J. Weertman:Trans. TMS-AIME, 1960, vol. 218, p. 207.
F. Garofalo:Fundamentals of Creep and Creep-Rupture in Metals, The Macmillan Co., p. 91, New York, 1965.
G. A. Webster and B. J. Piearcey:Mat. Sci. Jour., 1967, vol. 1, p. 97.
J. E. Cannaday, R. J. Austin, and R. K. Saxer:Trans. TMS-AIME, 1966, vol. 236, p. 595.
J. P. Dennison, R. J. Llewellyn, and B. Wilshire:J. Inst. Metals, 1967, vol. 95, p. 115.
G. R. Leverant and D. N. Duhl: unpublished research, Pratt and Whitney Aircraft, Middletown, Conn., 1968.
A. B. Kuper, D. Lazarus, J. R. Manning, and C. T. Tomizuka:J. Appl. Phys., 1956, vol. 104, p. 1536.
E. Orowan:Symposium on Internal Stresses in Metals and Alloys, p. 451. Inst. Met., London, 1948.
B. H. Kear and B. J. Piearcey:Trans. TMS-AIME, 1967, vol. 239, p. 1209.
A. Giamei and B. H. Kear: unpublished research, Pratt and Whitney Aircaraft, Middletown, Conn., 1969.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Leverant, G.R., Kear, B.H. The mechanism of creep in gamma prime precipitation-hardened nickel-base alloys at intermediate temperatures. Metall Trans 1, 491–498 (1970). https://doi.org/10.1007/BF02811560
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02811560