DD6单晶叶片的γ′相演化
Evolution of γ′ phase in DD6 single crystal turbine blade
查看参考文献24篇
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文摘
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采用扫描电子显微镜(SEM)等手段研究DD6单晶涡轮叶片典型截面的γ′相演化规律。结果表明:与铸态组织相比,热处理态叶片各典型截面枝晶间区域的γ′相尺寸显著细化,枝晶间和枝晶干区域的γ′相尺寸趋于一致,分散度趋向减小,γ′相立方化程度提高;叶片各截面枝晶干和枝晶间区域的铸态和热处理态γ′相的尺寸均遵循正态分布规律;热处理态叶片叶身截面γ′相尺寸小于榫头,叶身截面中部位置γ′相尺寸大于前缘、尾缘γ′相尺寸。 |
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其他语种文摘
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The evolution rule of γ′ phase in typical cross sections of DD6 single crystal superalloy turbine blade was investigated experimentally by SEM. The results show that comparing with the as-cast microstructures, the γ ′ phase sizes of typical cross sections in the interdendrite regions of the heat-treated turbine blade are obviously refined, the γ′ phase sizes of the interdendritic (ID) region and dendritic core (DC) tended to be the same, and the γ′ phase size dispersion tended to decrease, the γ′ phases cubed degree increased. The sizes of as-cast and heat-treated γ′ phase in the dendrite core and interdendritic region of each cross section of the blade follow the normal distribution law. The size of γ′ phase in the section of the heat-treated blade is smaller than that of the tenon, and the size of the γ′ phase in the middle of the section is larger than that of the leading edge and trailing edge. |
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来源
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航空材料学报
,2020,40(6):8-15 【核心库】
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DOI
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10.11868/j.issn.1005-5053.2020.000023
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关键词
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镍基高温合金
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DD6
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单晶涡轮叶片
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γ′相
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地址
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1.
中国航发北京航空材料研究院, 北京, 100095
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先进高温结构材料重点实验室, 先进高温结构材料重点实验室, 北京, 100095
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-5053 |
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学科
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金属学与金属工艺 |
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文献收藏号
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CSCD:6869765
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