Abstract
Void nucleation and growth was studied in three binary equiaxed α-β Ti-Mn alloys containing 1.8 wt pct Mn (alloy 2), 3.9 wt pct Mn (alloy 3), and 5.8 wt pct Mn (alloy 4) given heat treatments to vary the alpha size at constant volume fraction of alpha. Void nucleation rates expressed as number of voids per unit volume,N v, increased exponentially with true strain, ε. WhenN v was normalized with respect to the number of alpha particles or grains per unit volume, Nα T,N v/Nα T was found to be largest for the largest alpha size in each alloy series. Void size distributions as a function of strain for one alloy containing 3.9 wt pct Mn (alloy 3 given heat treatment B,3B) were presented and, as expected, the largest number of voids occurred at the smallest void sizes. Void growth rates for alloys 3 and 4 were found to increase with increasing particle size and this was ascribed to decreasing constraints to slip with increasing particle size. For alloy 2C with the largestα grain size void growth rates were smallest and this behavior was attributed to the growth inhibiting effects of multiple twinning. Evidence was adduced to show that nucleating voids grow more rapidly than established voids.
Similar content being viewed by others
References
J. Knott and A. H. Cottrell:J. of Iron and Steel Institute, 1963, vol. 201, p. 249.
A. Franklin and W.M. Tegart:J. of Iron and Steel Institute, 1954, vol. 202, p. 588.
K. Puttick:Phil. Mag., 1959, vol. 4, pp. 964–69.
A. Cottrell:Fracture, J. Wiley & Sons Book Co., New York, NY, 1959, p. 20.
C.F. Tipper:Metallurgia, 1949, vol. 39, pp. 133–37.
M.A. Greenfield and H. Margolin:Metall. Trans., 1972, vol. 3, pp. 2649–59.
H. Margolin and Y. Mahajan:Metall. Trans. A, 1978, vol. 9A, pp. 781–91.
H. Margolin and T. V. Vijayaraghavan:Metall. Trans. A, 1983, vol. 14A, pp. 2043–53.
H. Margolin and L. Rozenberg:Titanium ’80, Science and Technol- ogy, TMS-AIME, Warrendale, PA, 1981, vol. 3, pp. 1637–43.
H. C. Rogers: The effect of material variables on ductility,Ductility, ASM Seminar, ASM, Metals Park, OH, 1967, pp. 31–56.
T. V. Vijayaraghavan: Polytechnic University, 333, Jay Street, Brooklyn, NY 11201, unpublished research, 1987.
R.W. Bauer and H.G.F. Wilsdorf:Scripta Metall., 1973, vol. 7, pp. 1213–20.
H. Margolin, J.C. Chesnutt, J.C. Williams, and G. Lutjering:Tita- nium ’80, Science and Technology, 1980, vol. 1, pp. 109–216.
T. V. Vijayaraghavan: M. S. Thesis, Polytechnic Inst. of New York, 1982.
E. E. Underwood:Quantitative Microscopy: R. T. DeHoff and F. N. Rhines, eds., McGraw-Hill Book Co., ch. 6, pp. 149-200.
P. Bridgman:Studies in Large Plastic Flow and Fracture,McGraw-Hill, New York, NY, 1952, pp. 9–37.
S. Ankem and H. Margolin:Metall. Trans. A, 1986, vol. 17A, pp. 2209–26.
S. Ankem and H. Margolin:Metall. Trans. A, 1982, vol. 13A, pp. 603–09.
Author information
Authors and Affiliations
Additional information
T. V. Vijayaraghavan, Formerly Graduate Student, Polytechnic University, Brooklyn, NY
Rights and permissions
About this article
Cite this article
Vijayaraghavan, T.V., Margolin, H. Observations on void nucleation and growth in α/β Ti-Mn alloys. Metall Trans A 19, 1311–1317 (1988). https://doi.org/10.1007/BF02662592
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02662592