航空材料学报2011，Vol.31Issue(z1)：80-84,5.
TG6高温钛合金中α2相的沉淀析出行为及其对塑性的影响
Precipitation Behavior of α2 Phase in High Temperature Titanium Alloy and Effect on the Tensile Plasticity
摘要
Abstract
The increasing heat resistance requirement of high temperature titanium alloy is usually obtained by the means of adding high content of Al, Sn, Zr and Si. However, the tensile plasticity may decrease remarkably due to the precipitation of α2 phase and Silicide which precipitated after long-time thermal exposure. This paper studies the precipitation behavior of α2 phase of TG6 titanium alloy in the different heat treatment states and its influence on tensile plasticity. The results show that the optimal dynamic temperature for α2 precipitation in the α matrix is about 600℃ for TG6 titanium alloy. The α2 phase has a coherent orientation relationship and small misfit with the α matrix. The precipitation of a2 may promote the concentration of dislocation slip plane and block the cross slip which may result in a inhomogeneous distribution of slip band and thick slip band, which may lead a significant loss of tensile plasticity.关键词
高温钛合金/α2相/沉淀析出Key words
TG6 titanium alloy/α2 phasesprecipitation behavior引用本文复制引用
李娟,蔡建明,黄旭,曹春晓..TG6高温钛合金中α2相的沉淀析出行为及其对塑性的影响[J].航空材料学报,2011,31(z1):80-84,5.基金项目
国家重点基础研究发展计划项目资助(2007CB613803) （2007CB613803）
