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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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镍基690合金时效过程中晶界碳化物的形貌演化
, PP. 195-198
Keywords: 碳化物,晶界类型,690合金,热处理
Abstract:
用SEM研究了含有高比例低∑重位点阵(CSL)晶界的镍基690合金在715℃时效过程中不同类型晶界上碳化物的形貌演化.结果表明低∑CSL晶界与一般大角晶界上碳化物的形貌演化特征有明显区别.晶界上的碳化物粒子尺寸随∑值降低而减小,共格∑3晶界上的小尺寸碳化物在长时间时效后无明显变化;非共格∑3晶界和∑9晶界附近都观察到板条状碳化物,并随时效时间延长明显长大,非共格∑3晶界两侧都存在碳化物板条,而∑9晶界上的碳化物板条只在晶界一侧生长;∑27晶界与一般大角晶界处的碳化物形貌相似,在晶界附近未观察到板条状碳化物.
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