Dislokační struktura únavově zatěžované superslitiny Inconel 713 LC při pokojové a zvýšených teplotách

Dislocation structure in fatigued Inconel 713 LC Superalloy at room and high temperature

Článek recenzovaný mimo WoS a Scopus

Dislocation structure was studied in polycrystalline superalloy INCONEL 713 LC cyclically strained under strain control with constant total strain amplitude up to failure at 23, 500, 700 and 800 °C. Thin oriented foils were studied in transmission electron microscope equipped with double tilt holder. Inhomogeneous dislocation microstructure was documented at all four temperatures. Dislocations were present both in the matrix and in the gama` precipitates. Higher dislocation density was in the matrix. Planar slip bands parallel to the {111} planes were observed at room and high temperatures. The slip bands were present at thin slabs of high dislocation density cutting both the gama channels and gama` particles.

Dislocation structure was studied in polycrystalline superalloy INCONEL 713 LC cyclically strained under strain control with constant total strain amplitude up to failure at 23, 500, 700 and 800 °C. Thin oriented foils were studied in transmission electron microscope equipped with double tilt holder. Inhomogeneous dislocation microstructure was documented at all four temperatures. Dislocations were present both in the matrix and in the gama` precipitates. Higher dislocation density was in the matrix. Planar slip bands parallel to the {111} planes were observed at room and high temperatures. The slip bands were present at thin slabs of high dislocation density cutting both the gama channels and gama` particles.

Superalloz, Inconel 713 LC, dislocation microstructure, fatigue

PETRENEC, M., OBRTLÍK, K., POLÁK, J.

28.06.2002

1335-0803

Materiálové inžinierstvo

9

3/2002

Slovenská republika

146

4

http://fstroj.utc.sk/journal-mi