Session: 25-03 Deformation Modeling + Life Prediction

Paper Number: 151363

Future Prediction of Phase Transition of Single Crystal Nickel Based Superalloys for Gas Turbine Blades via Discrete Cosine Transform and Maximum Entropy Method 

It is well known that the Discrete Cosine Transform can express the creep curves of various materials very well. Moreover, it is known that the Discrete Cosine Transform can interpolate and extrapolate the creep curves of various materials by using the short term creep data. In addition, it was reported that distribution of the dislocations in the Nickel based superalloys can be extracted from the creep rate curves by utilizing the Discrete Cosine Transform at TurboExpo2022. Furthermore, it is recognized that the Maximum Entropy method incorporating the Discrete Cosine Transform can predict the dynamic phase transition of single crystal Nickel based superalloys for gas turbine blades with interpolation between two SEM metallographic charts during the creep phenomena at TurboExpo2023 and TurboExpo2024. There are many SEM charts in various papers and data bases. Hence, researchers in this field can predict the dynamic phase transition by utilizing two SEM charts chosen from those papers or data bases. However, prediction with extrapolation of dynamic phase transition in the near future during the creep phenomena at high temperature and high pressure via the Maximum Entropy method incorporating the Discrete Cosine Transform has not been reported yet. Therefore, in TurboExpo2025, it will be reported that the prediction with extrapolation of dynamic phase transition in the near future of single crystal Nickel based superalloys during the creep phenomena at high temperature and high pressure can be possible by using the Discrete Cosine Transform and the Maximum Entropy method.

Presenting Author: Hideo Hiraguchi The Institution of Professional Engineers, Japan (MEXT : Ministry of Education, Culture, Sports, Science and Technology, Japan)

Presenting Author Biography: Hideo Hiraguchi
･Bachelor of Engineering (Institute of Science Tokyo, Formaly:Tokyo Institute of Technology)
･Master of Engineering (Institute of Science Tokyo, Formaly:Tokyo Institute of Technology)
･Professional Engineer, Japan (Mechanical)
･APEC Engineer (Mechanical)

Mr. Hiraguchi has discovered a new creep equation of high temperature materials for gas turbines, boilers and so on using the Discrete Cosine Transform.

On the 11th June 2019, he made a presentation at ICM13 (IUTAM) on the new creep equation using the Discrete Cosine Transform in Melbourne, Australia.

On the 23th September 2020, he made a presentation at TurboExpo2020 (ASME) on the new prediction method of long-term creep curves using short-term creep data via the Discrete Cosine Transform.

On the 9th June 2021, he made a presentation at TurboExpo2021 (ASME) on "STUDY ON RELATIONSHIP BETWEEN DISLOCATION DENSITY AND CREEP STRAIN RATE OF SINGLE CRYSTAL Ni BASED SUPERALLOY FOR GAS TURBINES USING THE DISCRETE COSINE TRANSFORM".

On the 27th June 2023, he made a presentation at TurboExpo2023 (ASME) on "A NOVEL ESTIMATION METHOD FOR PHASE TRANSITION FOLLOWING HIGH TEMPERATURE CREEP STRAIN RATE OF SINGLE CRYSTAL Ni BASED SUPERALLOYS FOR GAS TURBINE BLADES VIA COMBINATION OF DISCRETE COSINE TRANSFORM AND MAXIMUM ENTROPY METHOD".

On the 28th June 2024, he made a presentation at TurboExpo2024 (ASME) on “Optimum Geometrical Models for Prediction of Phase Transition of Single Crystal Nickel Based Superalloys via the Discrete Cosine Transform and the Maximum Entropy Method”.

List of papers
(1) H. Hiraguchi, “Study on the display formula of the rate constant α of the creep equation by the modified θ projection applied to the turbine material”, Proceedings of Asian Congress on Gas Turbines 2018 (ACGT2018), ACGT2018-TS53, Morioka, Japan, August 22-24, 2018.
(2) H. Hiraguchi, “On the proposal of a new creep equation of high temperature materials”, Proceedings of the 56 th Symposium on Strength of Materials at High Temperatures of the Society of Materials Science, Japan, pp. 77-78, Ishigaki, Okinawa, Japan, December 6-7, 2018.
(3) H. Hiraguchi, “Study on New Creep Life Evaluation Method using Discrete Cosine Transform”, Proceedings of the 13th International Conference on the Mechanical Behaviour of Materials (ICM13, IUTAM), Melbourne, Australia, 11-14 June, 2019, Paper ID: 13.
(4) H. Hiraguchi, “On the Expression of the Anomalous High-Temperature Creep Curve of Ni-Cr-W Superalloy by Single Equation using the Discrete Cosine Transform”, Proceedings of Ibaraki Conference 2019 of JSME, 22 August, 2019.
(5) H. Hiraguchi, “Study on the expression of the rate constant α of the creep equation by modified θ projection applied to turbine materials”, Heliyon (Elsevier) 5 (10), October, 2019.
(6) H. Hiraguchi, "Study on new creep equation using discrete cosine transform for high temperature materials", Heliyon (Elsevier) 5 (10), October, 2019.
(7) H. Hiraguchi, "Application of Two-Dimensional Discrete Cosine Transform to Coefficients of Bailey-Norton Creep Law", Proceedings of ATEM'19 (International Conference on Advanced Technology in Experimental Mechanics 2019), JSME-MMD, October 7-10, 2019, Niigata, Japan.
(8) H. Hiraguchi, "NEW NUMERICAL ANALYSIS METHOD FOR CREEP LIFETIME OF GAS TURBINE MATERIALS BY USING THE DISCRETE COSINE TRANSFORM", Proceedings of ASME Turbo Expo 2020, 23 September, 2020, GT2020-14029.
(9) H. Hiraguchi, "STUDY ON RELATIONSHIP BETWEEN DISLOCATION DENSITY AND CREEP STRAIN RATE
OF SINGLE CRYSTAL Ni BASED SUPERALLOY FOR GAS TURBINES USING THE DISCRETE COSINE TRANSFORM", Proceedings of ASME Turbo Expo 2021, 7-11 June, 2021, GT2021-58801.
(10) H. Hiraguchi, "A NOVEL ESTIMATION METHOD FOR PHASE TRANSITION FOLLOWING HIGH TEMPERATURE CREEP STRAIN RATE OF SINGLE CRYSTAL Ni BASED SUPERALLOYS FOR GAS TURBINE BLADES VIA COMBINATION OF DISCRETE COSINE TRANSFORM AND MAXIMUM ENTROPY METHOD", Proceedings of ASME Turbo Expo 2023 (Turbomachinery Technical Conference and Exposition GT2023), GT2023-100786, June 26-30, 2023, Boston, Massachusetts, USA.
(11) H. Hiraguchi, “Optimum Geometrical Models for Prediction of Phase Transition of Single Crystal Nickel Based Superalloys via the Discrete Cosine Transform and the Maximum Entropy Method”, Proceedings of ASME Turbo Expo 2024 (Turbomachinery Technical Conference and Exposition GT2024), GT2024- 120879, June 24-28, 2024, London, United Kingdom.

Authors:

Hideo Hiraguchi The Institution of Professional Engineers, Japan (MEXT : Ministry of Education, Culture, Sports, Science and Technology, Japan)