Abstract
Heavy alloys were liquid phase sintered from compacts of mixed W, Ni, and Fe powders. The alloy compositions ranged from 93 to 97 wt pct W, with the Ni:Fe ratio maintained at 7:3. Sintering was performed under hydrogen in the 1465 to 1485 °C temperature range, giving full density within the first 15 minutes. The room temperature strength and ductility showed major degradation with sintering times in excess of two hours. Tensile tests and bend tests have been performed to isolate the fracture mode and the property determining features. Initial cracking occurs at the tungsten-tungsten grain boundaries and in the tungsten grains. These latter cracks propagate through the structure to give eventual failure. The ductility to failure is shown to be governed by the strength of the tungsten-matrix interface. The maximum elongation depends on the contiguity, which in turn is set by the alloy composition.
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References
D.V. Edmonds and P. N. Jones:Metall. Trans. A, 1979, vol. 10A, pp. 289–95.
R. V. Minakova, A. N. Pilyankevich, O. K. Teodorovich, and I. N. Frantsevich:Soviet Powder Met. Metal Ceram., 1968, vol. 7, pp. 396–99.
R. V. Minakova, A.N. Pilyankevich, O.K. Teodorovich, and I.N. Frantsevich:Soviet Powder Met. Metal Ceram., 1968, vol. 7, pp. 473–77.
E.-T. Henig, H. Hofmann, and G. Petzow:Proceedings of the 10th Plansee-Seminar, H. M. Ortner, ed., Metallwerk Plansee, Reutte, Austria, 1981, vol. 2, pp. 335–59.
D.J. Jones and P. Munnery:Powder Met., 1967, vol. 10, pp. 156–73.
R. M. German and J. E. Hanafee:Processing of Metal and Ceramic Powders, R.M. German and K.W. Lay, eds., TMS-AIME, Warrendale, PA, 1982, pp. 267–82.
B.C. Muddle and D.V. Edmonds:Phil. Trans. Royal Soc. Lond., 1980, vol. A295, p. 129.
L. G. Bazhenova, A. D. Vasilev, R. V. Minakova, and V. I. Trefilov:Soviet Powder Met. Metal Ceram., 1980, vol. 19, pp. 34–38.
H. K. Yoon, S. H. Lee, S-J. L. Kang, and D. N. Yoon:J. Mater. Sci., 1983, vol. 18, pp. 1374–80.
C-C. Ge, X-I. Xia, and E-T. Henig:Proceedings PIM-82 (International Powder Metallurgy Conference, Florence, Italy, June 1982),Associazione Italianadi Metallurgia, Milano, Italy, 1982, pp. 709-14.
M. Yodogawa:Sintering-Theory and Practice, D. Kolar, S. Pejovnik, and M.M. Ristic, eds., Elsevier Scientific Pub. Co., Amsterdam, Netherlands, 1982, pp. 519–25.
T. K. Kang, E-T. Henig, W.A. Kaysser, and G. Petzow:Modem Developments in Powder Metallurgy, H. H. Hausner, H. W. Antes, and G.D. Smith, eds., Metal Powder Industries, Princeton, NJ, 1981, vol. 14, pp. 189–203.
K-S. Churn and D.N. Yoon:Powder Met., 1979, vol. 22, pp. 175–78.
R. H. Krock and L. A. Shepard:Trans. TMS-AIME, 1963, vol. 227, pp. 1127–34.
L. Ekbom:Modern Developments in Powder Metallurgy, H.H. Hausner, H.W. Antes, and G. D. Smith, eds., Metal Powder Industries Federation, Princeton, NJ, 1981, vol. 14, pp. 177–88.
R.H. Krock:Metals for the Space Age, F. Benesovsky, ed., Metallwerk Plansee, Reutte, Austria, 1965, pp. 256–75.
R.H. Krock:J. Materials, 1966, vol. 1, pp. 278–92.
J. F. Kuzmik:Modern Developments in Powder Metallurgy, H.H. Hausner, ed., Plenum Press, New York, NY, 1966, vol. 3, pp. 166–72.
H. Takeuchi:Nippon Kinzoku Gakkaishi, 1967, vol. 31, pp. 1064–69.
E.G. Zukas:Metall. Trans. B, 1976, vol. 7B, pp. 49–54.
I.Y. Kzykovich, R. V. Makarova, O.K. Teodorovich, and I.N. Frantsevich:Soviet Powder Met. Metal Ceram., 1965, vol. 4, pp. 655–60.
J.M. Googin, W.L. Harper, A.C. Neeley, and L.R. Phillips: “Development of Ductile Tungsten Alloys,” Report Y-1364, Y-12 Plant, Union Carbide Nuclear Division, Oak Ridge, TN, August 1961.
M. R. Eisenmann and R.M. German:Prog. Powder Met., 1982, vol. 38, pp. 203–13.
A. N. Niemi, L. E. Baxa, J. K. Lee, and T. H. Courtney:Modern Developments in Powder Metallurgy, H. H. Hausner, H. W. Hausner, H. W. Antes, and G. D. Smith, eds., Metal Powder Industries Federation, Princeton, NJ, 1981, vol. 12, pp. 483–95.
I. M. Stephenson and J. White :Trans. Brit. Ceramic Soc, 1967, pp. 443-83.
L. Ebkom:Scand. J. Metallurgy, 1976, vol. 5, pp. 179–84.
G. Grathwohl and R. Warren:Mater. Sci. Eng., 1974, vol. 14, pp. 55–65.
M. Komac and L. Lange:Inter. J. Powder Met. Powder Tech., 1982, vol. 18, pp. 313–21.
K.S. Cherniavsky:Sci. Sintering, 1982, vol. 14, pp. 1–12.
J.R. Pickens and J. Gurland:Mater. Sci. Eng., 1978, vol. 33, pp. 135–42.
J. Gurland and P. B. Bardzil:Trans. AIME, 1955, vol. 203, pp. 311–15.
J. Gurland:Trans. TMS-AIME, 1963, vol. 227, pp. 1146–50.
J. L. Chermant and F. Osterstock:Powder Met. Inter., 1979, vol. 11, pp. 106–09.
J.L. Chermant and F. Osterstock:J. Mater. Sci., 1976, vol. 11, pp. 1939–51.
R. Warren and M.B. Waldron:Powder Met., 1972, vol. 15, pp. 166–80.
H. C. Lee: Ph. D. Thesis, Brown University, 1977.
H. Suzuki and K. Hayashi:Trans. Japan Inst. Metals, 1969, vol. 10, pp. 360–64.
P.B. Anderson:Panseeber. Pulverment., 1967, vol. 15, pp. 180–86.
F. V. Lenel:Powder Metallurgy Principles and Applications, Metal Powder Industries Federation, Princeton, NJ, 1980, pp. 383–400.
H. E. Exner and J. Gurland:Powder Met., 1970, vol. 13, pp. 13–30.
C. Lea, B.C. Muddle, and D. V. Edmonds:Metall. Trans. A, 1983, vol. 14A, pp. 667–77.
H.H. Hausner:Metals and Alloys, 1943, vol. 18, pp. 437–40.
F. E. Sczerzenie and H. Rogers:Hydrogen in Metals, I. M. Bernstein and A.W. Thompson, eds., ASM, Metals Park, OH, 1974, pp. 645–55.
V.G. Bukatov, V.M. Romashov, and Y. V. Gostev:Soviet Powder Met. Metal Ceram., 1982, vol. 21, pp. 785–88.
A. Joshi and D. F. Stein:Metall. Trans., 1970, vol. 1, pp. 2543–46.
J. R. Stephens:High Temperature Materials II, G. M. Ault, W. F. Barclay, and H. P. Munger, eds., Interscience Publ., New York, NY, 1963, pp. 125–37.
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Formerly a Postdoctoral Fellow at RPI under a fellowship from the Korea Science and Engineering Foundation
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Churn, K.S., German, R.M. Fracture Behavior of W-Ni-Fe Heavy Alloys. Metall Trans A 15, 331–338 (1984). https://doi.org/10.1007/BF02645119
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DOI: https://doi.org/10.1007/BF02645119