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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Hf含量对镍基粉末高温合金中γ'相形态的影响
DOI: 10.3724/SP.J.1037.2012.00136, PP. 1011-1017
Keywords: 粉末高温合金,Ni3(Al,Ti),？γ'相形态稳定性
Abstract:
研究了含Hf镍基粉末高温合金在长期时效处理过程中γ'相形态的演化过程.结果表明合金在高温长期处理过程中立方状γ'相发生分裂,呈现出二重平行状和八重小立方体组态,八重小立方体组态作为择优形态不再发生分裂,处于低能稳定状态.不同Hf含量合金的错配度发生明显变化,γ'相的长大或粗化过程可以粗略地分为“界面控制”和“应变控制”2个阶段,γ'相间弹性相互作用能对合金中析出相的形态变化起着重要作用.
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