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Influence of Trace Oxygen on the Mechanical Properties of High Pure Silver during Natural Aging

Influence of Trace Oxygen on the Mechanical Properties of High Pure Silver during Natural Aging
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摘要 Two kinds of high pure silver materials with 5.3 ppm oxygen and 32.7 ppm oxygen were prepared by various melting processes, both samples were subjected to accumulative rolling with 95% thickness reduction. Their mechanical properties were tested during long natural aging. Results showed that the Ag sheet with 5.3 ppm oxygen is at full annealed state when natural aging 58 days or kept at 150℃ for 30 minutes, and the Ag sheet with 32.7 ppm oxygen is a little of recovery when natural aging a year. It is suggested that appropriate oxygen interstitial solute in Ag solid solution and a few of Ag2O particles at Ag grain boundaries impede the recovery and recrystallization of Ag sheets. Two kinds of high pure silver materials with 5.3 ppm oxygen and 32.7 ppm oxygen were prepared by various melting processes, both samples were subjected to accumulative rolling with 95% thickness reduction. Their mechanical properties were tested during long natural aging. Results showed that the Ag sheet with 5.3 ppm oxygen is at full annealed state when natural aging 58 days or kept at 150℃ for 30 minutes, and the Ag sheet with 32.7 ppm oxygen is a little of recovery when natural aging a year. It is suggested that appropriate oxygen interstitial solute in Ag solid solution and a few of Ag20 particles at Ag grain boundaries impede the recovery and recrystallization of Ag sheets.
出处 《贵金属》 CAS CSCD 北大核心 2012年第A01期154-158,共5页 Precious Metals
关键词 SILVER trace oxygen natural aging mechanical property silver trace oxygen natural aging mechanical property
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