Corrosion and Tarnish Behaviour of 925Ag75Cu and 925Ag40Cu35Zn Alloys in Synthetic Sweat and H2S Atmosphere

Yang, Qing; Xiong, Weihao; Zhen, Yang; Dingjie, Shen; Wang, Ronghui

doi:10.1016/s1875-5372(10)60092-6

Cited by 6 publications

(2 citation statements)

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“…The heat treatment processes for 92. 5 above 745 °C to dissolve all the copper in the silver matrix and rapid quenching in water to create super-saturated state, and aging at low temperature (typically 300 °C for 30-60 min) leading to formation of very fine Cu-rich precipitates. To abstain the fire scale and obtain the suitable spring property, the aging treatment would be performed after casting without homogenization.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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Microstructural and Mechanical Development of As-Cast and Heat-Treated 935AgCu Alloys

Sakultanchareonchai

Chairuangsri

Imurai

et al. 2017

MSF

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Microstructural and mechanical development of the various heat-treated 935 Ag-Cu alloys were explored. The heat-treatment processes were applied viz. holding before quenching for 2 and 15 min, homogenization at 750 °C for 60 min followed by water quenching, and aging at 350 °C for 15 to 60 min followed by water quench. It was found that the specimens with copper addition gave a high resiliency in all heat treatment conditions however the effect of homogenization with aging treatment fostered deep blemish or fire scale on its surface. The amplifications of resiliency of 935 heat-treated AgCuSn and AgCuBe alloy were increased but elongation values were slightly reduced. The 935 AgCuBeSn specimens produced adequate resiliency and elongation after aging at 350 °C for 15 to 60 min followed by water quenching. Partial dissolution and spheroidization of eutectic phase were occurred by homogenization treatment at 750 °C. Aging treatment promoted precipitation of 3-20 nm fcc (Cu,Sn)–rich precipitates and engendered an improvement of hardness, yield strength and the modulus of resilience or resiliency.

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Section: Mechanical Propertiesmentioning

confidence: 99%

“…Several alloying elements such as. Al, Au, Ge, Ir, Mn, Pd, Pt, Se, Te and Zn, have been studied for improving resiliency including anti-tarnishing by using grain refining and heat treatment [1][2][3][4][5][6]. Beryllium [7] has been expected to enhance the potential of precipitation hardening in Ag-Cu alloy.…”

Section: Introductionmentioning

confidence: 99%