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A new method for strengthening gold
Gold Bulletin
  • Alan M. Russell, Iowa State University
  • Kai Xu, Iowa State University
  • L. Scott Chumbley, Iowa State University
  • James Parks, Iowa State University
  • Joel Harringa, Iowa State University
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Metal-metal composites were first produced in a copper matrix in the 1970’s, and they have since been produced in several other binary metal systems. This strengthening technique reinforces a ductile metal matrix with a ductile metal second phase. In some binary systems, this technique confers extraordinarily high strength and hardness while still maintaining low electrical resistivity. This article reports on the first gold matrix metal-metal composite, which was produced by deformation processing a 90%Au-10%Ag powder compact. The Au-Ag specimen studied had an ultimate tensile strength of 550 MPa and an electrical resistivity only 8% higher than that of pure Au at a deformation processing true strain of 5.6. The 590 nm average Ag filament thickness in this composite was relatively coarse compared to other deformation processed composites, which suggests that substantially higher strengths would be possible in a gold matrix metal-metal composite using deformation processing to higher true strains to reduce the filament thickness.

This article is from Gold Bulletin 31 (1998): 88-92, doi: 10.1007/BF03214768. Posted with permission.

Copyright © 1998 L. Scott Chumbley et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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L. Scott Chumbley
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Alan M. Russell, Kai Xu, L. Scott Chumbley, James Parks, et al.. "A new method for strengthening gold" Gold Bulletin Vol. 31 Iss. 3 (1998) p. 88 - 92
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