Design TiZrCuNi filler materials for vacuum brazing TA15 alloy. (May 2020)

• Record Type: Journal Article
• Authors: Jing, Yongjuan; Xiong, Huaping; Shang, Yonglai; Wang, Jinsan; Cheng, Yaoyong; Jiang, Jun
• Is Part Of: Journal of manufacturing processes. Volume 53(2020)
• Page Start: 328
• Page End: 335
• Publication Date: 2020-05
• Subjects: TA15 -- Brazing -- Filler material design -- Joint strength; Production management -- Data processing -- Periodicals; Manufacturing processes -- Periodicals; Procestechnologie; Productietechniek; Production -- Gestion -- Informatique -- Périodiques; Fabrication -- Périodiques; Manufacturing processes; Production management -- Data processing; Periodicals; 670.5
• DOI: 10.1016/j.jmapro.2020.02.021
• Languages: English
• ISSNs: 1526-6125

Abstract

Abstract: TA15 alloy with near α microstructure offers excellent high temperature mechanical properties for future gas turbine blades. To developing for the thin-wall and complex structure of this material, brazing is preferred. However, a new brazing material and process are required. In this study, a new theoretical modeling approach for designing Ti-based filler material for TA15 is presented by simulation on the bond strength in the crystal unit for the brazing filler material (BFM). The BFM chemical composition was determined as Ti-(17∼19)Zr-15Cu-15Ni wt.% to balance its strength, the toughness and relative lower melting temperature for TA15. All the fracture happened in the matrix rather than the brazing joints. It means that the strength of the brazed TA15 joint at room temperature was at least as strong as that of the matrix. Furthermore, under its service temperature (600℃), the strength of the brazing joint maintained almost 70 % of strength. The high joint strength and the ductile connection were attributed to the formed Widmanstätten structure and the sufficient diffusion of Cu and Ni solutes from the BFM across the interface. No intermetallics compound was formed in the joint. This model is established to optimizing a Ti-based filler material for achieving the excellent properties of brazed joints.