Abstract
Heavily drawn Cu-Nb alloys display quite high ultimate tensile strengths. A modification to the consumable arc-casting technique used to prepare these alloys is shown to decrease the as-cast niobium dendrite diameter,t 0, and also increase strength. Evaluation of strength, niobium filament spacing and thickness data show that strength varies with as-cast niobium dendrite size as somewhere betweent −0.36o tot −0.50o . Splat-cooling techniques demonstrate that minimum niobium dendrite sizes as small as 0.22μm are possible. These sizes are over a factor of 10 smaller than has been achieved by consumable arc casting, and it is therefore suggested that processing rapidly solidified powders of Cu-Nb alloys should have significant advantages for preparing high-strength heavily drawn Cu-Nb alloys.
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References
J. Bevk, J. P. Harbison andJ. L. Bell,J. Appl. Phys. 49 (1979) 6031.
K. R. Karasek andJ. Bevk,Scripta Metall. 14 (1980) 431.
Idem, J. Appl. Phys. 52 (1981) 1370.
P. D. Funkenbusch andT. H. Courtney,Acta Metall. 33 (1985) 913.
P. D. Funkenbusch, J. K. Lee andT. H. Courtney,Met. Trans. 18A (1987) 1249.
A. R. Pelton, F. C. Laabs, W. A. Spitzig andC. C. Cheng,Ultramicroscopy 22 (1987) 251.
S. Chumbley andC. Trybus, unpublished research, Ames Laboratory, Ames, Iowa (1988).
W. A. Spitzig, A. R. Pelton andF. C. Laabs,Acta Metall. 35 (1987) 2427.
W. A. Spitzig andC. L. Trybus, unpublished research, Ames Laboratory, Ames, Iowa (1988).
W. A. Spitzig andP. D. Krotz,Acta Metall. (1987).
C. V. Renaud, E. Gregory andJ. Wong,Adv. Cry. Eng. 32 (1986) 443.
J. D. Verhoeven, F. A. Schmidt, E. D. Gibson andW. A. Spitzig,J. Metals 38(9) (1986) 20.
W. A. Spitzig andP. D. Krotz,Scripta Metall. 21 (1987) 1143.
J. J. Sue, J. D. Verhoeven, E. D. Gibson, J. E. Ostenson andD. K. Finnemore,Acta Metall. 29 (1981) 1791.
J. P. Harbison andJ. Bevk,J. Appl. Phys. 48 (1978) 5180.
E. R. Underwood, “Quantitative Stereology” (Addison-Wesley, Reading, Massachusetts, 1970) p. 83.
J. D. Verhoeven, J. J. Sue, D. K. Finnemore, E. D. Gibson andJ. E. Ostenson,J. Mater. Sci. 15 (1980) 1907.
E. Klar andJ. W. Fesko, “Metals Handbook”, Vol. 7, Powder Metallurgy, 9th Edn (American Society for Metals, Metals Park, Ohio, 1984) p. 25.
J. D. Verhoeven andE. D. Gibson,J. Mater. Sci. 13 (1978) 1576.
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Verhoeven, J.D., Spitzig, W.A., Schmidt, F.A. et al. Processing to optimize the strength of heavily drawn Cu-Nb alloys. J Mater Sci 24, 1015–1020 (1989). https://doi.org/10.1007/BF01148792
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DOI: https://doi.org/10.1007/BF01148792