铸造2012，Vol.61Issue(7)：754-757,4.
微量Zr对铸造TiAl合金高温力学性能的影响
Effects of Trace Zirconium Addition on High Temperature Mechanical Properties of Casting TiAl Alloy
骆晨 1吕楠 2朱春雷 1李海昭 1柳学全1
作者信息
- 1. 钢铁研究总院高温材料研究所,北京100081
- 2. 辽宁科技大学材料与冶金学院,辽宁沈阳114051
- 折叠
摘要
Abstract
Based on directional lamellar microstructure of Ti-47.5Al-2.5V-l.0Cr (at.%) alloy by adding 0.2at.% Zr, the effects of trace zirconium on high temperature mechanical properties of cast TiAl alloy have been studied.The result shows that adding 0.2at.% Zr significantly increased the creep rupture life of the alloy, but did not influence the high temperature tensile strength obviously.According to examination on the microstructures of alloys before and after test, the mainly reason that trace Zr increased the rupture life is that Zr improves the lamella thermal stability of cast TiAl alloy.Additionally, Zr hinders the precipitation of equiaxed gamma grain during hot isostatic pressing, which is also beneficial to creep rupture properties.关键词
铸造TiAl合金/定向层片组织/微量Zr/高温力学性能Key words
cast titanium aluminide alloy/ directional lamellar microstructure/ trace Zr/ high temperature mechanical properties分类
矿业与冶金引用本文复制引用
骆晨,吕楠,朱春雷,李海昭,柳学全..微量Zr对铸造TiAl合金高温力学性能的影响[J].铸造,2012,61(7):754-757,4.
