PSI - Issue 14

Afroz Shaikh et al. / Procedia Structural Integrity 14 (2019) 782–789 Afroz Shaikh / Structural Integrity Procedia 00 (2018) 000–000

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- 14% higher as compared to that of FC specimen. The highest hardness (472.5 HV) is obtained for the heat treatment cycle HT 3 followed by WQ. Thus, it can be observed that cooling rate has a significant effect on the hardness of the sample.

b

a

Martensitic α (α’)

Blocky Acicular α

c

d

Plate-like Acicular α

f

e

Fig .5. Microstructure of heat treated samples (a-b) 1050°C FC up to 950 °C & WQ; (c-d) 1050°C FC up to 950 °C & AC; (e-f) 1050°C FC up to 950 °C & FC .

Fig. 6. Influence of solution treatment and cooling rate on hardness of Ti6Al4V alloy.