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OALib Journal期刊
ISSN: 2333-9721
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双晶镍基高温合金定向凝固过程的结构演化
DOI: DOI:10.3724/SP.J.1037.2010.00280, PP. 1327-1334
Keywords: 高温合金,定向凝固,枝晶生长,晶粒竞争长大
Abstract:
研究了双晶镍基高温合金IN792定向凝固过程的结构演化.对于汇聚生长晶粒,非择优取向枝晶在晶界处能够阻挡择优取向枝晶的生长,从而导致晶界从非择优取向晶粒向择优取向晶粒倾斜,竞争长大的结果是择优取向晶粒消失,非择优取向晶粒获胜;对于发散生长晶粒,晶界处会形成新的枝晶,从而导致晶界从择优取向晶粒向非择优取向晶粒倾斜,竞争长大的结果是择优取向晶粒获胜,非择优取向晶粒消失.
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