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首页> 外文会议>THERMEC 2011;International conference on processing manufacturing of advanced materials >Effect of Heat Treatments and Small Addition of Fe on the Occurrence of Serration in Al-Zn Alloys
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Effect of Heat Treatments and Small Addition of Fe on the Occurrence of Serration in Al-Zn Alloys

机译：热处理和少量添加铁对铝锌合金中锯齿状发生的影响

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The effect of heat treatment conditions and small addition of Fe on occurrence of serration in Al-Zn alloys was investigated. Specimens were aged for various times up to 5Ms at 293K or 273K after quenching from various temperatures (T_Q), 398K to 853K, and tensile-tested at room temperature. Serration occurred more easily according as Tq became lower and the aging time became snorter: in the case that T_Q=473K serration was observed even after aging for 2.6Ms, while in the case that T_qQ=773K serration did not occur irrespective of aging conditions. Serration was also recognized when the specimens were furnace-cooled from 773K to room temperature. Thus, for the binary alloy serration was observed only when the aging period was short enough, but addition of Fe to the binary alloy prolonged the aging period where serration could be recognized. Aging rate measured by hardness was remarkably retarded with the increase of Fe addition. These results together with those obtained by the electrical resistometry suggest that the serration in Al-Zn alloys occurs in the early stage of aging where small GP zones or solute clusters are formed.
机译：研究了热处理条件和少量添加铁对Al-Zn合金中出现锯齿的影响。从各种温度（T_Q），398K到853K淬火后，将样品在293K或273K下老化5Ms的不同时间，并在室温下进行拉伸测试。随着Tq降低和老化时间变干，锯齿更容易出现：即使在老化2.6M​​s后仍观察到T_Q = 473K锯齿，而无论老化条件如何，都不会出现T_qQ = 773K锯齿。当将样品从773K炉冷到室温时，也可以看到锯齿。因此，对于二元合金，仅当时效时间足够短时才观察到锯齿，但是向二元合金中添加Fe会延长可识别锯齿的时效时间。随着Fe添加量的增加，通过硬度测量的时效速率显着延迟。这些结果以及通过电阻法获得的结果表明，Al-Zn合金中的锯齿出现在时效的早期，即形成小的GP区域或溶质团簇。

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