PSI - Issue 26

P. Ferro et al. / Procedia Structural Integrity 26 (2020) 11–19 Ferro et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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Table 2. Welding process parameters.

Filler metal

Current

Weld pass

Volt

Speed (cm/min)

Diameter (mm)

Type & Polarity DE - EN DE - EN

Type class

Ampere

1° 2°

ER Ti-5 ER Ti-5

3.2 3.2

95

14 15

11 11

126

Fig. 1. Phase diagram of the alloy under investigation

Two different PWHTs were investigated, a stress-relieving heat treatment (SR) and a partial solution and quenching heat treatment followed by aging (SQA) (Fig. 3).

Fig. 2. Geometries of the samples for tensile tests

a

b

T S

T SR

T aging

Water quenching

In-oven cooling

Temperature

Temperature

Air cooling

Time

Time

Fig. 3. Schematics of the PWHTs investigated: a) stress-relief (SR) heat treatment and b) partial solution and quenching heat treatment followed by aging (SQA)