PSI - Issue 36

Valentin Ilyushenko et al. / Procedia Structural Integrity 36 (2022) 100–105 V. Ilyushenko, T. Maydanchuk, E. Lukianchenko, S. Kozulin, S. Marynenko / Structural Integrity Procedia 00 (2021) 000 – 000 3

102

а

b

c

d

Fig. 2. Appearance of defects in copper chambers after operation: a – a network of deep cracks; b – traces from mechanical stress; c – local burnout of copper on the end part of the chamber; d – through burns walls of water-cooling channels.

In order to clarify the causes of deep cracks on the end part of the chamber, comparative studies of metal samples cut from the end (position II) and tail parts of the chamber, position I (Fig. 3) were carried out. Mechanical properties at different temperatures were investigated, and metallographic, chemical and gas analysis of copper was carried out.

a

b

Fig. 3. Samples for mechanical tests (a) and the place of sample cutting (b).