Ni含量对钴基高温合金组织与性能的影响
Effect of Ni content on microstructure and properties of Co-based superalloys
查看参考文献18篇
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文摘
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采用非自耗真空熔炼炉制备钴基高温合金铸锭,利用扫描电子显微镜(SEM)和X射线衍射分析仪(XRD)研究Ni含量(0%,5%,10%,20%(原子分数))对钴基高温合金组织和晶格错配度的影响。通过对不同Ni含量的合金进行高温压缩实验,研究Ni含量对钴基高温合金性能的影响。结果表明:随着Ni含量的增加,γ'相的平均尺寸增加;当Ni含量从0%增加到15%时,合金中强化相的体积分数逐渐增加,当Ni含量增加到20%时,合金中强化相的体积分数稍有减少;Ni含量从0%增加到10%时,γ/γ'两相的晶格错配度降低,Ni含量从10%增加到15%时,γ/γ'两相的晶格错配度略有增加,当Ni含量增加到20%时,γ/γ'两相的晶格错配度又开始降低;Ni含量为5%的合金屈服强度最高。 |
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其他语种文摘
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Co-based superalloys casting ingots were prepared by vacuum smelting furnaces, and the influence of Ni content on the microstructure and lattice misfit of Co-based superalloys were studied by X-ray diffraction analysis (XRD) and scanning electron microscope (SEM).The effect of Ni content on the properties of Co-based superalloys was studied by high temperature compression test.The results show that the average size of the γ' phase increases with the increment of Ni content.When the Ni content rises from 0% to 15%, the volume fraction of the γ ' phase in the alloy increases gradually, which peaks at 15% Ni content.After that the volume fraction of the γ' phase decreases slightly when the Ni content increases to 20%.When the Ni content increases from0 to 10%, the lattice misfit between γ/γ' phase decreases.While the misfit of the γ/γ' phase increases slightly when the Ni content raises to 20%.The Ni content increases from 10% to 15%, the lattice misfit of the γ/γ' phase begins to decreases again.Through the test of high temperature compression of the alloy, the yield strength of the alloy with 5% Ni content is the highest. |
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来源
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航空材料学报
,2019,39(6):73-80 【核心库】
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DOI
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10.11868/j.issn.1005-5053.2019.000036
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关键词
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高温合金
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Ni
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错配度
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组织形貌
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屈服强度
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地址
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1.
江苏科技大学材料科学与工程学院, 江苏, 镇江, 212003
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东北大学工程研究生院冶金系, 日本, 仙台, 980-8579
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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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基金
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国家自然科学基金面上项目
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江苏省自然科学青年基金项目
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文献收藏号
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CSCD:6638077
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