| TA15线性摩擦焊接头高周疲劳性能分析 |
| |
| 引用本文： | 张传臣,张田仓,刘 颖.TA15线性摩擦焊接头高周疲劳性能分析[J].焊接学报,2018,39(5):105-108. |
| |
| 作者姓名： | 张传臣 张田仓 刘 颖 |
| |
| 作者单位： | 中国航空制造技术研究院航空焊接与连接技术航空科技重点实验室 |
| |
| 摘 要： | 在相同热处理制度下，开展了TA15钛合金母材与TA15线性摩擦焊接头高周疲劳性能试验，并对疲劳断口进行扫描电镜分析. 结果表明,从S-N曲线低应力区到高应力区，焊缝针状组织的疲劳强度高于母材双态组织，随着应力的增大，两种组织的疲劳强度差异逐渐缩小；接头针状组织的疲劳极限(463 MPa)高于母材双态组织(423 MPa). 断口分析结果表明，TA15母材的疲劳断口相对较平，扩展区二次裂纹较少，而线性摩擦焊接头中存在较多的二次裂纹，降低了裂纹扩展速度，说明针状组织的疲劳性能优于双态组织.
|
| 关 键 词： | TA15钛合金 线性摩擦焊 组织 疲劳性能 |
| 收稿时间： | 2016/11/23 0:00:00 |
Cycle fatigue properties of TA15 titanium alloy linear friction welded joint |
| |
| ZHANG Chuanchen,ZHANG Tiancang,LIU Ying.Cycle fatigue properties of TA15 titanium alloy linear friction welded joint[J].Transactions of The China Welding Institution,2018,39(5):105-108. |
| |
| Authors: | ZHANG Chuanchen ZHANG Tiancang LIU Ying |
| |
| Abstract: | The high cycle fatigue properties and fracture features of TA15 titanium alloy and Linear Friction Welded (LFW) joint were investigated. The results show that fatigue strength of bi-model structure of TA15 base metal is lower than acicular structure of welded joint，and with the stress increasing，the fatigue property gap between welded joint microstructure and base metal microstructure gradually decreasing. The fatigue limit of LFW joint acicular structure (463 MPa) is higher than that of base metal bi-modal structure (423 MPa) in the high cycle. Fracture analysis results show that the fracture of TA15 base metal is smooth and second cracks are less than those of welded joint in extended area. Second cracks reduced the crack growth rate, which shows that the fatigue property of acicular structure is superior to that of bi-modal structure. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《焊接学报》浏览原始摘要信息 |
|
点击此处可从《焊接学报》下载全文 |
