Hostname: page-component-76fb5796d-22dnz Total loading time: 0 Render date: 2024-04-25T08:53:57.481Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of Aging and Thermal Cycling Treatments on the Damping Capacity of Cu-Mn Alloys

Published online by Cambridge University Press:  10 February 2011

T. S. Chung ,
J. H. Jun  and
Y K. Lee
T. S. Chung
Affiliation:
Agency for Defence Development, Daejun 305-600, KOREA, chungts@nownuri.net
J. H. Jun
Affiliation:
Research Institute of Iron and Steel Technology, Yonsei University, Seoul 120-749, KOREA
Y K. Lee
Affiliation:
Department of Metallurgical Engineering, Yonsei University, Seoul 120-749, KOREA
Get access

Abstract

The effects of aging and thermal cycling treatments on the damping capacity and microstructure of Cu-(47, 55, 65)%Mn alloys and Cu-65%Mn-4.5%Ni alloy have been studied using an optical microscope, a transmission electron microscope (TEM), and a cantilever type damping measuring apparatus. The maximum damping capacity appeared after aging at 400°C for 18 hours in Cu-47%Mn, 8 hours in Cu-55%Mn, 4 hours in Cu-65%Mn, and 36 hours in Cu-65%Mn-4.5%Ni alloy, respectively. Storage at 100°C slightly reduced damping capacity of these alloys, and the higher the Mn content, the smaller the amount of the degradation. This result might be ascribed to α-Mn precipitation inside microtwins in Cu-65%Mn alloy, and to the microstructural change from tweed structure to mottled structure in the other alloys. The thermal cycling treatment between room temperature (20°C) and 250°C led to an increase in damping capacity, which is probably due to the refinement of microstructure(tweed or twin).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 481: Symposium P – Science and Technology of Semiconductor Surface Preparation , 1997 , 333
Copyright
Copyright © Materials Research Society 1998

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Vitek, J.M. and Warlimont, H., Metal Science 1, 7 (1976).Google Scholar
2. Menshikov, A.Z., Farstov, Y.K., Kochetkova, L.P., Konoplev, L.M. and Dorofeyen, H., Fiz. metal. metalloved. 39, 793 (1975).Google Scholar
3. Bichinashvili, A.I., Vintaykin, Y.Z., Litvin, D.F. and Udovenko, V.A., Phys. Met. Metall. 41, 112 (1976).Google Scholar
4. Adachi, K., Yamashita, T., Farkas, D.M. and Perkins, J., Phil. Mag. 73, 1009 (1996).Google Scholar
5. Birchon, D., Bromley, D.E., and Hedly, D., Met. Sci. J. 2, 41 (1968).Google Scholar
6. Laddha, S. and Aken, D.C. Van, Metall. Mater. Trans. 26A, 957 (1995).Google Scholar
7. Shimizu, K., Okumura, Y. and Kubo, H., Trans. Jpn. Inst. Met. 23, 53 (1982).Google Scholar
8. Butler, E.P. and Kelly, P.M., Trans. Metall. Soc. AIME 242, 2099 (1968).Google Scholar
9. Favstov, Y.K, Shulga, Y.N. and Rakhshtadt, A.G., The Metallurgy of Damping Alloys (Metallurgiya, 1980).Google Scholar
10. Laddha, S. and Aken, D.C. Van and Lin, H.T., Metall. Mater. Trans. 28A, 105 (1997).Google Scholar