| Y, Nb对快速凝固TiAl合金组织和性能的影响 |
| |
| 引用本文： | 柴丽华,陈玉勇,刘志光.Y, Nb对快速凝固TiAl合金组织和性能的影响[J].稀有金属材料与工程,2011,40(11):1976-1980. |
| |
| 作者姓名： | 柴丽华 陈玉勇 刘志光 |
| |
| 作者单位： | 哈尔滨工业大学,黑龙江哈尔滨,150001 |
| |
| 基金项目： | 国家自然科学基金 (50674037) |
| |
| 摘 要： | 研究了元素Y和Nb对用熔体快淬法制备的TiAl基快速凝固合金组织及性能的影响。发现添加Y的快速凝固TiAl合金主要为等轴晶,主要组成相为α2和少量的γ相。随着Y含量的增加,γ相的含量增加,快速凝固TiAl合金的组织逐渐细化。不同Nb含量的快速凝固TiAl合金的组织为块状结构和层片状结构,主要由γ和α2两相组成,层片间距显著细化,为15～17nm。快速凝固TiAl合金的硬度比其铸态合金显著提高。
|
| 关 键 词： | TiAl 组织 硬度 Y Nb |
| 收稿时间： | 2010/11/22 0:00:00 |
Effects of Y and Nb on the Microstructure and Mechanical Properties of Rapidly Solidified TiAl Alloys |
| |
| Chai Lihu,Chen Yuyong and Liu Zhiguang.Effects of Y and Nb on the Microstructure and Mechanical Properties of Rapidly Solidified TiAl Alloys[J].Rare Metal Materials and Engineering,2011,40(11):1976-1980. |
| |
| Authors: | Chai Lihu Chen Yuyong and Liu Zhiguang |
| |
| Affiliation: | Harbin Institute of Technology, Harbin 150001, China |
| |
| Abstract: | The effects of Y and Nb on the microstructure and mechanical properties of rapidly solidified TiAl alloys were investigated.Results show that the rapidly solidified TiAl alloys with various Y contents are of equiaxed microstructure,and composed mainly of α2 and a few amount of γ phase.With Y content increasing,the volume fraction of γ phase is increased and the microstructure of the TiAl alloys is gradually refined.The alloys with various Nb contents show lamellar structure with reduced interlamellar spacings of 15-17 nm and massive structure.γ and α2 are also the two main phases for rapidly solidified TiAl alloys with various Nb addition.The hardness of rapidly solidified TiAl alloys is higher than that of the conventionally cast TiAl alloys. |
| |
| Keywords: | TiAl microstructure hardness Y Nb |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《稀有金属材料与工程》浏览原始摘要信息 |
|
点击此处可从《稀有金属材料与工程》下载全文 |
|
