Heat treatment caused an increase in ductility. Aging caused an increase in strength and hardness with a decrease in ductility. Overaging caused decreases in strength and ductility. Solution treating resulted in a single phase. The precipitation of coherent intermetallic compounds caused maximum strengthening with minimum loss of ductility.
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References
1.
Asgar, K.: The Relationship Between the Physical Properties and Microstructure of Chromium Cobalt-Base Alloys Used in Dentistry, PhD dissertation, Ann Arbor, University of Michigan, 1959.
2.
Asgar, K. and Peyton, F.A.: Effect of Microstructure on the Physical Properties of Cobalt-Base Alloys , J Dent Res40: 63, 1961.
3.
Christian, J.W. : The Theory of Transformations in Metals and Alloys, New York: Pergamon Press , 1965, p 973.
4.
Storms, E.K. : The Refractory Carbides, New York: Academic Press, 1967, p 373.
5.
Mohammed, H. , and Asgar, K.: A New Dental Superalloy System: I. Theory and Alloy Design, J Dent Res52: 136, 1973.
6.
Mohammed, H. , and Asgar, K.: A New Dental Superalloy System: II. Mechanical Properties, J Dent Res52: 145, 1973.
7.
Mohammed, H. ; Asgar, K.; and Bigelow, W.C.: A New Dental Superalloy System: III. Microstructure and Phase Transformations, J Dent Res52: 151, 1973.
8.
Drapier, J.M. ; DE Brouwer, J.L.; and Cout-Souradis , D.: Refractory Metals and Intermetallic Precipitates in Cobalt-Chromium Alloys, Cobalt27: 59, 1965.
9.
Korchynsky, M., and Fountain, R.W.: Precipitation Phenomena in Cobalt-Tantalum Alloys, Trans AIME215: 1033, 1959.
10.
Sims:; C.T. : A Contemporary view of Cobalt-Base Alloys , J Metals21: 27-42, 1969.
11.
Freidel, J.: Dislocations, Oxford: Pergamon Press , 1964, p 594.
12.
Mohammed, H. , and Asgar, K.: A New Superalloy System: Embrittling Phase Transformations, J Dent Res53: 7-14, 1974.
13.
Beattie, H.J. , JR., and Hagel, W.C.: Compositional Control of Phases Precipitating in Complex Austenetic Alloys, Trans AIME233: 277, 1965 .
