Diffusion Bonding of Ti6Al4V at Low Temperature via SMAT

Metals

Guofeng Wang¹  Liqiang Zhan¹  Yuqing Chen¹  Yongkang Liu¹  He Diao¹  Yuelin Wang² 

[1] Harbin Institute of Technology, School of Materials Science and Engineering, Harbin 150001, China;Shenyang Aircraft Industry (Group) Co., Ltd., Shenyang 110850, China;

关键词: surface mechanical attrition treatment;    nanostructure;    low-temperature diffusion bonding;   

DOI  :  10.3390/met12010094

来源: DOAJ

【 摘 要 】

Titanium alloys used to be welded to gain good joint strength at 920 °C through diffusion bonding. However, due to the heat preservation at high temperatures for a long time, we obtain joints with great bond strength while the mechanical properties of the sheet are lost. In this paper, taking Ti6Al4V alloy as an example, we studied the microstructure of the surface under the different times of surface mechanical attrition treatment (SMAT). In addition, the microstructure and mechanical properties after diffusion bonding at 800 °C-5 MPa-1 h were also conducted. The results show that the shear strength of TC4 alloy welded joint after SMAT treatment is improved, and the maximum shear strength can reach 797.7 MPa, up about 32.4%

【 授权许可】

Unknown