| 热变形对FGH96高温合金原始颗粒边界的影响 |
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| 引用本文： | 傅豪,王梦雅,纪箴,田高峰,秦恬,贾成厂.热变形对FGH96高温合金原始颗粒边界的影响[J].粉末冶金技术,2018,36(3):201-205. |
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| 作者姓名： | 傅豪 王梦雅 纪箴 田高峰 秦恬 贾成厂 |
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| 作者单位： | 1.北京科技大学材料科学与工程学院, 北京 100083 |
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| 摘 要： | 通过Gleeble-1500热模拟试验机对热等静压成形FGH96高温合金进行热压缩试验，其中温度为1075℃，变形速率为0.001 s-1，变形量为70%。利用场发射扫描电镜、透射电镜和电子能谱研究了合金原始颗粒边界（prior particle boundary，PPB）的组成，讨论了原始颗粒边界在FGH96高温合金再结晶过程中的作用，并分析了合金热变形对原始颗粒边界的影响。结果表明:热等静压成形FGH96高温合金中的原始颗粒边界主要由Ti的碳化物和γˊ相共同组成；原始颗粒边界对合金热变形再结晶形核起促进作用，对晶粒长大起阻碍作用；合金热变形可以改善原始颗粒边界在组织中的分布，从而使晶粒长大过程顺利进行。
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| 关 键 词： | 高温合金 热压缩 原始颗粒边界 再结晶 |
| 收稿时间： | 2018-01-16 |
Effect of thermal deformation on prior particle boundary of FGH96 superalloy |
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| Affiliation: | 1.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China2.National Key Laboratory of Advanced High Temperature Structural Materials, Beijing Institute of Aeronautical Materials, Beijing 100095, China |
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| Abstract: | The hot compression test of FGH96 superalloy made by hot isostatic pressing was carried out on Gleeble-1500 thermal simulator at 1075℃ with the deformation of 70% under the deformation rate of 0.001 s-1. Field emission scanning electron microscopy, transmission electron microscopy, and electron spectroscopy were used to study the composition of prior particle boundary (PPB), the role of PPB on the recrystallization FGH96 superalloy was investigated, and the effect of alloy thermal deformation on PPB was analyzed. The results show that, the prior particle boundary in hot isostatic pressed FGH96 superalloy mainly consists of Ti carbide and γ' phase. The PPBs play the promoting role on recrystallization nucleation and hinder the grain growth. The thermal deformation can improve the distribution of PPB, which is in favour of the grain growth process. |
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