Fatigue Properties of Superalloy IN 713LC and Relation to Microstructure

Authors

  • Ludvík KUNZ∗, Petr LUKÁŠ, Radomila KONEČNÁ Institute of Physics of Materials, Academy of Sciences of the Czech Republic

Keywords:

IN 713LC, high-cycle fatigue, casting defects, extreme value statistics

Abstract

symmetrical loading and under action of tensile mean stresses. The influence of small cyclic component superimposed on high tensile mean stress was experimentally determined. Three nominally identical casts were investigated. Fractographic observation has been made with the aim to reveal the fatigue crack initiation place, its kind and relation to the casting defects and material microstructure. The observed high scatter of lifetime data has been correlated with the defect size and defect distribution and type of crack initiation. The extreme value statistics for inclusion size originally developed by Murakami for small defects in material has been adopted and tested for this particular case.

Downloads

Published

2008-09-06

Issue

Vol. 14 No. 3 (2008)

Section

METALS, ALLOYS, COATINGS

License

 

The copyrights for articles in this journal are retained by the author(s), with first publication rights granted to the journal. By virtue of their appearance in this open-access journal, articles are free to use with proper attribution in educational and other non-commercial settings.