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Wear properties of shock-consolidated amorphous and microcrystalline Ni-38 wt % Mo−8 wt % Cr-1. 5 wt % B alloy powders

Published online by Cambridge University Press:  31 January 2011

Thad Vreeland Jr. ,
Naresh N. Thadhani ,
Andrew H. Mutz ,
Susan P. Thomas  and
Roger K. Nibert
Thad Vreeland Jr.
Affiliation:
Division of Engineering and Applied Science, California Institute of Technology, Pasadena, California 91125
Naresh N. Thadhani
Affiliation:
Division of Engineering and Applied Science, California Institute of Technology, Pasadena, California 91125
Andrew H. Mutz
Affiliation:
Division of Engineering and Applied Science, California Institute of Technology, Pasadena, California 91125
Susan P. Thomas
Affiliation:
Roy C. Ingersoll Research Center, Borg-Warner Corporation, Des Plaines, Illinois 60018
Roger K. Nibert
Affiliation:
Roy C. Ingersoll Research Center, Borg-Warner Corporation, Des Plaines, Illinois 60018
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Abstract

Powder flakes prepared from 50/um thick melt-spun ribbons of Markomet 1064 (Ni52.5 Mo38 Cr8 B 1.5 wt %) were shock consolidated in the unannealed and annealed condition. The unannealed powder flakes (microhardness 933 kg/mm2) are amorphous while flakes annealed at 900°C for 2 h have a fcc crystal structure, with a microcrystalline grain size of 0.3 μm and microhardness of 800 kg/mm2. The shock-consolidated amorphous powder compact (∼250 kJ/kg shock energy) shows no crystal peaks in an x-ray diffractometer scan. Compacts of annealed powder (400–600 kJ/kg shock energies) contain amorphous material (18%–21%), which was rapidly quenched from the melt formed at interparticle regions during the consolidation process. The microhardness of the amorphous interparticle material is 1100 kg/mm2. Wear properties of the compacts measured in the low velocity friction apparatus (LVFA) pin-on-disk tests show low average friction values (−0.03). The 60 h cumulative wear appears to correlate with the energy of shock compaction rather than the metallic glass content. The Falex ring-on-block test also showed that both the Markomet amorphous compact and the compact containing a mixture of amorphous and microcrystalline phases performed almost equally and wore half as much as the base-line SAE-01 steel-polished sample.

Type
Articles
Information
Journal of Materials Research , Volume 1 , Issue 5 , October 1986 , pp. 661 - 666
Copyright
Copyright © Materials Research Society 1986

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References

REFERENCES

1Davis, L. A., in Metallic Glasses (American Society for Metals, Metals Park, OH, 1976), p. 203.Google Scholar
2Mehra, M., Ph.D. dissertation, California Institute of Technology, Pasadena, CA, 1984.Google Scholar
3Cline, C. F. and Hopper, R. W., Scr. Metall. 11, 1137 (1977).Google Scholar
4Morris, D. G., Met. Sci. 16, 457 (1982).Google Scholar
5Raybould, D., J. Mater. Sci. 16, 589 (1981).CrossRefGoogle Scholar
6Morris, D. G., Mater. Sci. Eng. 57, 187 (1983).Google Scholar
7Vreeland, T. Jr., Kasiraj, P., Mutz, A. H., and Thadhani, N. N., in the Proceedings of the International Conference on Metallurgical Applications of Shock-Wave and High-Strain-Rate Phenomena, edited by Murr, L. E. (Dekker, New York, 1986), p. 231.Google Scholar
8Schwartz, R., Kasiraj, P., and Vreeland, T. Jr., in Ref. 7, p. 313.Google Scholar
9Kasiraj, P., Kostka, D., Vreeland, T. Jr., and Ahrens, T. J., J. Non-Cryst. Sol. 61 and 62, 967 (1984).Google Scholar
10Vreeland, T. Jr., Kasiraj, P., and Ahrens, T. J., in the Proceedings of the Materials Research Society Symposium on Rapidly Solidified Metastable Materials, edited by Kear, B. H. and Geissen, B. C. (Elsevier, New York, 1984), p. 139.Google Scholar
11Thadhani, N. N., Mutz, A. H., Kasiraj, P., and Vreeland, T. Jr., in Ref. 7, p. 247.Google Scholar
12Thadhani, N. N., Mutz, A. H., and Vreeland, T. Jr., in the Proceedings of the 43rd Annual Meeting of the Electron Microscopy Society of America, edited by Bailey, G. W. (San Francisco Press, San Francisco, 1985), p. 38.Google Scholar
13Ahrens, T. J., Thadhani, N. N., Mutz, A. H., Vreeland, T. Jr., Schwarz, R. B., Tyburczy, J. A., Shastri, S. L. M., and Peng, T. C., in Ref. 7, p. 83.Google Scholar
14Haviland, M. L. and Rogers, J. T., Lubr. Engr. 17, 110 (1961).Google Scholar
15Albertson, C. and Wolfram, G., ASLE Trans. 12, 77 (1969).Google Scholar
16Rogers, J. J. and Gallopoulos, N. E., ASLE Trans. 10, 102 (1967).Google Scholar
17ASTM Data Ser., Designation D2714-68 revised 5.02, 504 (1986).Google Scholar