采用双光束双侧同步填丝焊接的方法制备Ti?6Al?4V合金T型接头，并对焊缝成形、组织、力学性能及其相互关系进行研究。结果表明，试验获得了质量良好的焊缝，未出现不连续、焊瘤、可见的裂纹及气孔等缺陷，同时发现其与焊接过程中稳定的熔池行为及良好的熔滴过渡有关。从接头截面可以发现，蒙皮及筋条侧热影响区的形状完全不同。热影响区和熔合区的组织包含针状马氏体α′相。热影响区及熔合区的显微硬度均高于母材，且在筋条侧靠近融合区的热影响区处显微硬度最大。沿蒙皮及筋条方向的拉伸试样均断裂于母材处，其断裂方式为延性断裂。
The T-joints of Ti?6Al?4V alloy were manufactured by double-sided synchronized laser beam welding with the homologous filler wire. The formation, microstructure and mechanical properties of welded joints as well as the correlations of each other were investigated. The results indicate that the quality of weld seams is good without defects such as discontinuity, beading, visible cracks or porosity, which is linked to the steady molten pool behavior and droplet transition. The morphologies of the heat affected zone (HAZ) located on the skin and stringer are disparate. The microstructure of the HAZ and fusion zone (FZ) is mainly comprised of acicular martensiticα′ phases. The microhardness of the HAZ and FZ is higher than that of the base metal (BM) and reaches a maximum value at the HAZ near FZ on the stringer. The tensile specimens along the skin and stringer fractured at the BM with ductile fracture surfaces.
参考文献
| [1] | E. Schubert;M. Klassen;I. Zerner.Light-weight structures produced by laser beam joining for future applications in automobile and aerospace industry[J].Journal of Materials Processing Technology,20011(1):2-8. |
| [2] | Z.B. Yang;W. Tao;L.Q. Li;Y.B. Chen;F.Z. Li;Y.L Zhang.Double-sided laser beam welded T-joints for aluminum aircraft fuselage panels: Process, microstructure, and mechanical properties[J].Materials & design,2012Jan.(Jan.):652-658. |
| [3] | A Squillace;U Prisco.Influence of filler material on micro- and macro-mechanical behaviour of laser-beam-welded T-joint for aerospace applications[J].Proceedings of the Institution of Mechanical Engineers, Part L. Journal of Materials: Design and Application,20093(3):103-115. |
| [4] | Tao, W.;Yang, Z.;Chen, Y.;Li, L.;Jiang, Z.;Zhang, Y..Double-sided fiber laser beam welding process of T-joints for aluminum aircraft fuselage panels: Filler wire melting behavior, process stability, and their effects on porosity defects[J].Optics & Laser Technology,2013:1-9. |
| [5] | Liu, H.;Nakata, K.;Yamamoto, N.;Liao, J..Microstructural characteristics and mechanical properties in laser beam welds of Ti6Al4V alloy[J].Journal of Materials Science,20123(3):1460-1470. |
| [6] | 徐培全.Ti-6Al-4V钛合金激光焊缝及其变形的微观表征[J].中国有色金属学报（英文版）,2012(09):2118-2123. |
| [7] | Wei Lu;Yaowu Shi;Yongping Lei;Xiaoyan Li.Effect of electron beam welding on the microstructures and mechanical properties of thick TC4-DT alloy[J].Materials & design,2012Feb.(Feb.):509-515. |
| [8] | T. S. BALASUBRAMANIAN;V. BALASUBRAMANIAN;M. A. MUTHUMANIKKAM;M. A. MUTHU MANICKAM.焊接方法对Ti-6Al-4V合金接头微观组织及拉伸和冲击性能的影响[J].中国有色金属学报（英文版）,2011(06):1253-1262. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%