| 奥氏体合金中溶质原子的晶界偏聚与晶界沉淀 |
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| 引用本文： | 李蓬,刘雅静.奥氏体合金中溶质原子的晶界偏聚与晶界沉淀[J].东北大学学报(自然科学版),1993(5). |
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| 作者姓名： | 李蓬 刘雅静 |
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| 作者单位： | 东北工学院物理学系
(李蓬)，东北工学院物理学系(刘雅静) |
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| 摘 要： | 用扫描电镜和透射电镜研究了晶界沉淀的形貌和化学组成,发现高温加热时生成富Ti 的厚片状晶界沉淀(MC);以后的低温加热时生成 Mo含量较高的薄片状晶界沉淀。不同冷却速度条件下的晶界沉淀(M_7C_3)的Cr 含量不同,加热后的冷却过程中,较低温度下析出的晶界沉淀(M_(23)C_6)中的Cr,Mn 含量较高。结果表明:溶质原子的错配度、点阵溶解度及沉淀温度对晶界沉淀产生影响。
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| 关 键 词： | 晶界偏聚 错配度 点阵溶解度 晶界沉淀 |
Boundary Segregation and Precipitation of Solute Atoms in Austenite Alloys |
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| Li Peng,Liu Yajing.Boundary Segregation and Precipitation of Solute Atoms in Austenite Alloys[J].Journal of Northeastern University(Natural Science),1993(5). |
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| Authors: | Li Peng Liu Yajing |
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| Abstract: | The morphology and chemical composition of boundary precipitates in austenite alloys were studied by SEM and TEM. It was found that thick-lamina Ti-rich precipates will take place at grain boundary when heating the alloys at high temperature and, on the other hand, thin-lamina Mo-rich precipates will take place at low temperature. At different cooting rates, Cr content in boundary precipitates (M7C3)was found also different. In the cooling process carried out after heating, Cr and Mn contents in boundary precipitates (M23C6) will increase to a certain degree. The results indicate that misfit of solute atoms, lattice solubility and precipitation temperature all have effects on boundary precipitation. |
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| Keywords: | boundary segregation misfit lattice solubility boundary precipitation |
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