Investigator: prof. RNDr. Ludvík Kunz, CSc., dr. h. c.
Number of Project: 106/05/2112
Agency: Czech Science Foundation
Duration: 01. 01. 2005 - 31. 12. 2007

The goal of the project is to determine experimentally the high-temperature lifetime and cyclic creep data of Ni-base cast superalloy IN713LC under action of high tensile mean loads in high-cycle fatigue region. Attention is devoted to the cyclic slip localization, changes of ?/?' &alpha microstructure, crack initiation and early crack propagation. An attempt is made to describe, explain and quantify the cyclic creep behaviour on the basis of the knowledge of loading rate and cyclic plasticity their influence on the formation of unidirectional plastic strain.

R. Mintách, L. Kunz, K. Hrbáček: Influence of Tensile Mean Stress on Fatigue Lifetime of Cast Superalloy IN713 LC. In: Sborník z konf. TRANSCOM 2005, Vol.5, p. 23-26.

Kunz, L., Lukáš, P., Mintách, R., Hrbáček, K.: Effect of Mean stress on High-Cycle Fatigue Strength on IN 713 LC Superalloy. Kovové Materiály 44 (2006) 275-281.

Kunz, L., Lukáš, P., Mintách, R., Hrbáček, K.: Effect of Mean Stress on High-Cycle Fatigue Strength of IN 713 LC Superalloy. Kovové Materiály 44 (2006) 275-281.

Kunz, L., Lukáš, P.: Deformation Behaviour and Fracture of Ni-Based Single Crystals at Simultaneous Action of High-Cycle Fatigue and Creep. Materálové inžinierstvo 14 (2/2007) 15-20

KUNZ, L., LUKÁŠ, P., MINTÁCH, R.: Effect of Vibrations on Lifetime of Ni Base Single Crystals Subjected to Tensile Stress. MSMF-5 (106/05/2112). Mater. Sci. Forum 567-568 (2008) 293-296.