材料工程2025，Vol.53Issue(10)：80-89,10.DOI:10.11868/j.issn.1001-4381.2024.000600
热处理温度对TA15钛合金室温拉伸性能二次波动行为的影响
Effect of heat treatment temperature on double fluctuation behavior of tensile properties at room temperature in TA15 titanium alloy
张明达 1杨杰 1张旺峰 1邓雨亭 1周毅 1黄浩1
作者信息
- 1. 中国航发北京航空材料研究院 先进钛合金航空科技重点实验室,北京 100095
- 折叠
摘要
Abstract
The microstructure evolution and tensile properties at room temperature of TA15 titanium alloys during heat treatment at different temperatures are investigated by optical microscopy(OM),scanning electron microscopy(SEM),and transmission electron microscopy(TEM).In particular,the double fluctuation behavior of tensile strength at room temperature in TA15 titanium alloys after heat treatment in the ranges of 800-900℃and above 950℃are characterized and analyzed in detail.The results show that with the increase of the heat treatment temperature,the microstructure evolution of equiaxed α phase+lamellar secondary α phase and β phase→equiaxed α phase+lamellar secondary α phase and β phase(internal newly formed fine α phase and β phase laths)→coarsened newly formed α phase and β phase laths undergoes in TA15 titanium alloys,which results in the increase trend of tensile strength at room temperature of TA15 alloys.The newly formed α phase and β phase laths at relatively high temperatures during the heat treatment absorb stagewise secondary α phase laths and equiaxed primary α phase,followed by coarsening as the heat treatment temperature further increases.It is concluded that the strengthening effect of newly formed α phase and β phase laths leads to the strength increase in the range of 800-900℃.Within the 900-950℃range,the newly formed lamellar α phase and β phase absorb the original lamellar secondary α+β phase,and the lamellar size in the newly formed α phase and β phase laths is relatively coarse,resulting in a slight decrease in strength.Above 950℃,the dissolution of the equiaxed α phase and its transformation into a higher proportion of newly formed α phase and lamellar β phase once again enhances the strengthening effect of the lamellar structure,causing a secondary peak in the tensile strength at room temperature above 950℃.关键词
TA15钛合金/热处理温度/组织演变/强度波动/微观机制Key words
TA15 titanium alloy/heat treatment temperature/microstructure evolution/strength fluctuation/microscopic mechanism分类
矿业与冶金引用本文复制引用
张明达,杨杰,张旺峰,邓雨亭,周毅,黄浩..热处理温度对TA15钛合金室温拉伸性能二次波动行为的影响[J].材料工程,2025,53(10):80-89,10.
