Abstract
The effects of Au/Cu ratio and gallium content on the low-temperature age-hardening were examined in Au-Cu binary and Au-Cu-Ga ternary alloys by hardness testing, X-ray diffraction and differential thermal analysis. In alloys in which the Au/Cu ratios greatly deviated from the equiatomic one, age-hardenability at 37 °C significantly decreased. Gallium addition lowered the liquidus temperature and increased the age-hardening rate. It is considered that the diffusion rate of the constituents increased with lowering of the liquidus temperature, and that consequently, gallium addition improved the age-hardenability.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. Wilm,Metallurgie 8 (1911) 225.
T. Shiraishi andM. Ohta,J. Mater. Sci. 24 (1989) 1049.
M. Ohta, T. Shiraishi, M. Nakagawa andS. Matsuya,ibid. 29 (1994) 2803.
H. Okamoto, D. J. Chakrabarti, D. E. Laughlin andT. B. Massalski,Bull. Alloy Phase Diagr. 8 (1987) 495.
P. Shewmon, in “Diffusion in Solids”, 2nd Edn (TMS, Warrendale, PA, 1989) p. 147.
“Metals Data Handbook”, 2nd Edn (Japan Institute of Metals, Maruzen, Tokyo, 1984) p.8.
M. Nakagawa, private communication, Kyushu University, Japan, 1994.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ouchida, R., Shiraishi, T., Nakagawa, M. et al. Effects of Au/Cu ratio and gallium content on the low-temperature age-hardening in Au-Cu-Ga alloys. J Mater Sci 30, 3863–3866 (1995). https://doi.org/10.1007/BF01153947
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01153947