White-Color Cu-Zn-Mn Alloys with Low Season Cracking Susceptibility

Manganese is one of the important elements to improve mechanical properties and control the surface color of Cu-Zn alloys. However, little is known about the mechanical property and season cracking susceptibility of the Cu-Zn-Mn alloys which contain more than 5mass%Mn. In this paper, we intend to ex...

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Veröffentlicht in:Journal of the Society of Materials Science, Japan Japan, 2004/02/15, Vol.53(2), pp.188-192
Hauptverfasser: YOSHIMURA, Yasuharu, KITA, Kazuhiko, INOUE, Akihisa
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Sprache:jpn
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Zusammenfassung:Manganese is one of the important elements to improve mechanical properties and control the surface color of Cu-Zn alloys. However, little is known about the mechanical property and season cracking susceptibility of the Cu-Zn-Mn alloys which contain more than 5mass%Mn. In this paper, we intend to examine the effect of manganese on the fundamental properties of Cu-Zn alloys, and to develop a new Cu-Zn-Mn alloy with much lower susceptibility and good mechanical property. The color properties of a* and b* values of the Cu-Zn-Mn alloys can be controlled by the change of Zn and Mn concentrations, and a Cu-25mass%Zn-10mass%Mn alloy has the same white color as Nickel Silver. The ternary alloy also exhibits the lowest season cracking susceptibility which is nearly the same as that for Cu-15mass%Zn alloy, by suppression of the formation tendency of surface oxide film during exposure in the ammonical environment.
ISSN:0514-5163
1880-7488
DOI:10.2472/jsms.53.188