Question

(b) Pure Ti is cooled from a temperature such that BCC (a) to hop (b) transformation occurs.
Assuming homogeneous nucleation, estimate the undercooling required to form a critical size
nucleus of 100 atoms of Titanium. Given: AH = -3.48 kJ/mol; surface energy, y=0.1 J/m2; atomic
wt. of Ti = 47.9; transformation temperature = 882°C; density of B-phase = 4500 kg/m². [8]​

Answer 1

Answer:

b) Pure Ti is cooled from a temperature such that BCC (a) to hop (b) transformation occurs. Assuming homogeneous nucleation, estimate the undercooling required to form a critical size. nucleus of 100 atoms of Titanium. ... of Ti = 47.9; transformation temperature = 882°C; density of B-phase = 4500 kg/m².

Explanation: