姜英,方晓英,王友林,彭欢,杜佳泽

• 1:山东理工大学机械工程学院

摘要(Abstract)：

采用电子背散射衍射(EBSD)技术研究了不同温度轧制黄铜H68样品退火后的晶界特征分布(GBCD)。黄铜H68再结晶样品在不同温度下(-20℃、室温、100℃)进行6%轧制,随后进行650℃×10 min退火处理。结果表明:在室温下轧制退火比在100℃轧制退火和-20℃轧制退火生成更高比例的特殊晶界,其值达到78.7%;较大尺寸(400μm)的∑3n(n=1,2,3)特殊晶粒团使外围的一般大角晶界网络连通性被阻断,实现了合金的GBCD优化。分析指出:在室温下轧制,合金的层错能有利于后续退火中形成退火孪晶,并发生Σ3n(n=1,2,3)晶界迁移与交互反应;在100℃下轧制,合金的层错能较高,有利于后续退火中生成一般大角度晶界包围的新生晶粒;在-20℃下轧制,合金的层错能较低,后续退火中晶界迁移的驱动力不足,不能实现GBCD优化。

关键词(KeyWords)： 黄铜 H68;轧制;晶界特征分布

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50771060)

作者(Author): 姜英,方晓英,王友林,彭欢,杜佳泽

DOI: 10.13289/j.issn.1009-6264.2014.01.008

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