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热处理对Ti-44Al-4Nb-4Zr-1B合金组织和性能的影响

发表时间:2012-05-15  浏览量:988  下载量:273
全部作者: 孙红亮,黄泽文
作者单位: 材料先进技术教育部重点实验室,西南交通大学材料科学与工程学院
摘 要: 研究不同的热处理工艺对铸造Ti-44Al-4Nb-4Zr-1B合金的片层晶团尺寸的细化作用。结果表明:铸造Ti-44Al-4Nb-4Zr-1B合金的700℃高温强度比室温下提高了约130~200 MPa. 室温及高温断裂延伸率都比较小,但是高温的断裂延伸率相对于室温有较大提高。在α+γ两相区进行的热处理可以细化该合金的晶团尺寸,但是这种片层晶团尺寸的细化对室温、高温强度及高温持久性能影响不大。
关 键 词: 材料学;TiAl基合金;热处理;显微组织;力学性能
Title: The effect of different heat treatment process on microstructure and mechanical properties of casting Ti-44Al-4Nb-4Zr-1B alloy
Author: SUN Hongliang, HUANG Zewen
Organization: Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Material Science and Engineering, Southwest Jiaotong University
Abstract: The effect of different heat treatment process on microstructure and mechanical properties of casting Ti-44Al-4Nb-4Zr-1B alloy was investigated. The results indicate that at 700℃ the tensile stress is increased by about 130-200 MPa, and the elongation to failure is significantly improved, compared to those at room temperature. The colonies of this cast alloy can be refined to some degree through some heat treatment schemes in the α+γ two-phase region, but the refinement has a little influence on tensile properties and stress rupture life.
Key words: materials science; TiAl-based alloy; heat treatment; microstructure; mechanical properties
发表期数: 2012年5月第9期
引用格式: 孙红亮,黄泽文. 热处理对Ti-44Al-4Nb-4Zr-1B合金组织和性能的影响[J]. 中国科技论文在线精品论文,2012,5(9):847-851.
 
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