PSI - Issue 14

P. Rama Rao et al. / Procedia Structural Integrity 14 (2019) 322–329 P R Rao et al/ Structural Integrity Procedia 00 (2018) 000–000

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from Ti-rich phase, α-Ti rich phase, (Ti, Zr) 2 Cu and eutectoid rich region, which are depicted in figure 4 (a) figure 4 (b) figure 4 (c) and figure 4(d), respectively. The EDX spectra collected from diffusion zone 1, diffusion zone 2, discontinuous reaction zone and central zone, which are shown in figure 5(a) figure 5(b) figure 5(c) and figure 5 (d), respectively. Approximate average chemical compositions obtained from such numerous experiments are shown in Table 2.

Fig. 4. Further FESEM images of the interface microstructures of Ti/Ti 20 Zr 20 Cu 50 Ni 10 /Ti composite brazed joint at 990 K for a period of 10 min: (a) Diffusion zone 1 (b) diffusion zone 2, (c) discontinuous reaction zone and (d) central zone.

Fig. 5 The EDX spectra of the interface microstructures of Ti/Ti 20 Zr 20 Cu 50 Ni 10 /Ti composite joint brazed at 990 K for a period of 10 min.

Table 2. EDX analyses based elemental chemical composition analysis of interface microstructures of Ti/ Ti 20 Zr 20 Cu 50 Ni 10 /Ti composite brazing joint 990 K for a period of 30 min

Elements (at. %)

Area

Ti

Zr

Cu

Ni

Phases

Spectrum 1

100.00

---

---

--

Ti-rich

Spectrum 2

91.35

2.07 5.63 0.95 α-Ti

Ref[4]

3.30 10.32 0.82 (Ti, Zr) 2 Cu Ref[5]

Spectrum 3

85.56

Spectrum 4

85.60

3.86 9.53 1.02 Eutectoid

Ref[3]