<abstract xmlns="http://www.w3.org/1999/xhtml"><p>This paper analyses the nickel based superalloy Inconel 713C casts typically used in high and low pressure turbines of aircraft engines. The ingots were manufactured in the Research and Development Laboratory for Aerospace Materials at the Rzeszów University of Technology. The superalloy structures were analysed by the following methods: X-ray diffraction orientation measurement and ultrasonic wave propagation. Ultrasonic techniques are mainly used to measure the blade wall’s thickness. Measurement accuracy is determined by the velocity of the ultrasonic wave in the material tested. This work evaluates the effect of the nickel-based superalloy microstructure on the velocity of the ultrasonic wave propagation. Three different macrostructures: equiax (EQ), directionally solidified (DS) and single crystal (SX) were analysed. The authors determined the crystal misorientation in the obtained casts as the deviation of [001] crystallographic direction from the withdrawal axis or the main axis of the ingots. The measurements performed allowed researchers to identify significant differences in the wave velocity between EQ, DS and SX structures.</p></abstract>

This paper analyses the nickel based superalloy Inconel 713C casts typically used in high and low pressure turbines of aircraft engines. The ingots were manufactured in the Research and Development Laboratory for Aerospace Materials at the Rzeszów University of Technology. The superalloy structures were analysed by the following methods: X-ray diffraction orientation measurement and ultrasonic wave propagation. Ultrasonic techniques are mainly used to measure the blade wall’s thickness. Measurement accuracy is determined by the velocity of the ultrasonic wave in the material tested. This work evaluates the effect of the nickel-based superalloy microstructure on the velocity of the ultrasonic wave propagation. Three different macrostructures: equiax (EQ), directionally solidified (DS) and single crystal (SX) were analysed. The authors determined the crystal misorientation in the obtained casts as the deviation of [001] crystallographic direction from the withdrawal axis or the main axis of the ingots. The measurements performed allowed researchers to identify significant differences in the wave velocity between EQ, DS and SX structures.

The Effect of Superalloy Structure on Ultrasonic Wave Parameters

Research and Development Laboratory for Aerospace Materials, Rzeszow University of Technology, Poland

Department of Material Science, Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Poland

Institute of Materials Science, University of Silesia, Katowice, Poland

Fatigue of Aircraft Structures

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"The Effect of Superalloy Structure on Ultrasonic Wave Parameters"}

This paper analyses the nickel based superalloy Inconel 713C casts typically used in high and low pressure turbines of aircraft engines. The ingots were...

The Effect of Superalloy Structure on Ultrasonic Wave Parameters

Published Online: Jun 30, 2016

Page range: 61 - 65

DOI: https://doi.org/10.1515/fas-2015-0010

Keywords
ultrasonic nondestructive testing, superalloy, turbine blade, macrostructure, crystalline orientation

© 2015 Jacek Nawrocki et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The Effect of Superalloy Structure on Ultrasonic Wave Parameters

Published Online: Jun 30, 2016

Page range: 61 - 65

DOI: https://doi.org/10.1515/fas-2015-0010

Keywordsultrasonic nondestructive testing, superalloy, turbine blade, macrostructure, crystalline orientation

© 2015 Jacek Nawrocki et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
ultrasonic nondestructive testing, superalloy, turbine blade, macrostructure, crystalline orientation