| 稀土Nd在Ti合金中的存在形态及其对Ti_3X相析出的影响 |
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| 引用本文： | 万晓景,经开良,史文,张丙,李东,杨锐. 稀土Nd在Ti合金中的存在形态及其对Ti_3X相析出的影响[J]. 材料研究学报, 1992, 6(1): 6-11 |
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| 作者姓名： | 万晓景 经开良 史文 张丙 李东 杨锐 |
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| 作者单位： | 上海工业大学冶金及材料研究所，上海工业大学，上海工业大学，上海工业大学，中国科学院金属研究所，中国科学院金属研究所 教授，上海市 200072 |
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| 基金项目： | 国家自然科学基金,5870013 |
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| 摘 要： | 用透射电镜,X 射线衍射技术研究了 Ti-Al-Nd 合金中稀土 Nd 的存在形态及其对 Ti_3X 析出的影响。结果表明,Nd 主要以脱氧产物 Nd_2O_3的颗粒弥散分布于基体中,颗粒尺寸约为100-200nm,Nd_2O_3为 bcc 结构。稀土 Nd 对合金的强化作用主要是 Nd_2O_3颗粒与位错作用引起的强化及 Nd_2O_3周围形成的位错亚结构的强化。Nd 对 Ti_3X 相析出有较好的抑制作用,其机理是稀土 Nd 的脱氧反应促使基体中氧的贫化,从而降低了合金的平均电子浓度所致。
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| 关 键 词： | 稀土Nd Ti_3X相 质点强化 |
| 收稿时间： | 1992-02-25 |
| 修稿时间： | 1992-02-25 |
EXISTENCE FORM OF RE ELEMENT Nd AND ITS EFFECT ON THE FORMATION OF Ti_3X PHASE |
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| WAN Xiaojing,JING Kailiang,SHI Wen,ZHANG BingLI Dong,YANG Rui. EXISTENCE FORM OF RE ELEMENT Nd AND ITS EFFECT ON THE FORMATION OF Ti_3X PHASE[J]. Chinese Journal of Materials Research, 1992, 6(1): 6-11 |
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| Authors: | WAN Xiaojing JING Kailiang SHI Wen ZHANG BingLI Dong YANG Rui |
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| Affiliation: | WAN Xiaojing,JING Kailiang,SHI Wen,ZHANG Bing(Shanghai University of Technology)LI Dong,YANG Rui(Institute of Metals Research,Academia Sinica) |
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| Abstract: | The existance form of RE element Nd and its effect on the precipitation ofTi_3X phase in Ti-Al-Nd alloy were investigated by TEM and X-ray diffraction techniques.The results show that the existance form of RE element Nd in Ti alloy is mainlyNd_2O_3 particles,which is the product of internal oxidation during melting and casting.The re-sults also show that the size of Nd_2O_3 particles is about 100-200nm and its structure is bcc.Thestrengthening role of Nd in titanium alloy is the combined interaction of Nd_2O_3 particles withdislocations.The depression effect of Nd on the Ti_3X phase formation is attributed to its low-ering the oxgyen concentration by internal oxidation and then lowing the average electron con-centration. |
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| Keywords: | Rare-earth element Ti_3X phase particles strengthening |
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