| 孔洞形态对镍基单晶合金蠕变行为的影响 |
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| 引用本文： | 张姝,田素贵,梁福顺,于莉丽,钱本江.孔洞形态对镍基单晶合金蠕变行为的影响[J].中国有色金属学报,2011,21(4). |
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| 作者姓名： | 张姝 田素贵 梁福顺 于莉丽 钱本江 |
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| 作者单位： | 1. 沈阳工业大学材料科学与工程学院,沈阳,110023;沈阳化工学院机械工程学院,沈阳,110142
2. 沈阳工业大学材料科学与工程学院,沈阳,110023 |
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| 摘 要： | 通过蠕变性能测试及组织形貌观察,研究不同形态孔洞缺陷对单晶镍基合金蠕变性能的影响,针对合金中存在有/无裂纹孔洞等铸造缺陷,对高温蠕变期间近有/无孔洞区域的应力分布进行有限元分析,根据拉应力载荷下近孔洞区域的微观应力分布特性,分析不同形态孔洞区域应力分布对单晶合金蠕变行为及组织演化的影响.结果表明:在高温蠕变期间,近有/无裂纹孔洞区域的应力分布对合金中)γ'相筏形化的形态有明显影响,在有/无裂纹孔洞两侧极点处,存在最大应力值,且可致使其裂纹沿垂直于应力轴方向发生萌生与扩展;与无裂纹孔洞相比,在有裂纹孔洞两侧的极点处应力值较大,随着蠕变的进行,在较大应力处易于发生裂纹的扩展是合金具有较低蠕变寿命的主要原因.
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| 关 键 词： | 单晶 镍基合金 孔洞形态 有限元分析 应力分布 蠕变寿命 |
Influence of cavity morphology on creep behaviors of single crystal nickel-base superalloy |
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| ZHANG Shu,TIAN Su-gui,LIANG Fu-shun,YU Li-li,QIAN Ben-jiang.Influence of cavity morphology on creep behaviors of single crystal nickel-base superalloy[J].The Chinese Journal of Nonferrous Metals,2011,21(4). |
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| Authors: | ZHANG Shu TIAN Su-gui LIANG Fu-shun YU Li-li QIAN Ben-jiang |
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| Affiliation: | ZHANG Shu1,2,TIAN Su-gui1,LIANG Fu-shun1,YU Li-li1,QIAN Ben-jiang1 (1.School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110023,China,2.School of Mechanical Engineering,Shenyang Institute of Chemical Technology,Shenyang 110142,China) |
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| Abstract: | By means of creep properties measurement and microstructure observation,the influence of cavity morphology on the creep behaviors of a single crystal nickel-base alloy was investigated.Due to the cavity with or without cracks exists in the as-cast superalloy,the stress distribution near the cavity with or without cracks during high temperature creep was analyzed by finite elements analysis method(FEM),and the influence of the stress distribution near the cavity regions on the creep behaviors and microstruct... |
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| Keywords: | single crystal nickel-based superalloys cavity morphology FEM analysis stress distribution creep lifetime |
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