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Assessment of the chemical composition homogeneity of turbine blades from a jet engine turbine
1
Instytut Transportu/ Institute of Transport, Politechnika Poznańska / Poznan University of Technology, Poland
2
Institute of Technical Chemistry and Electrochemistry, Poznań University of Technology, Poland
Submission date: 2026-07-17
Final revision date: 2026-09-29
Acceptance date: 2026-10-02
Online publication date: 2026-10-08
Corresponding author
Grzegorz M. Szymański
Instytut Transportu/ Institute of Transport, Politechnika Poznańska / Poznan University of Technology, Piotrowo 3, 60-965, Poznań, Poland
Instytut Transportu/ Institute of Transport, Politechnika Poznańska / Poznan University of Technology, Piotrowo 3, 60-965, Poznań, Poland
KEYWORDS
TOPICS
ABSTRACT
The variability of primary emission signals from high-pressure turbine blades originating from the same stage of an SO-3 turbojet engine was evaluated using Laser Ablation coupled with Microwave-Induced Plasma Optical Emission Spectrometry (LA-MIP OES). Forty turbine blades were investigated, with one analytical measurement performed for each blade. Direct solid sampling enabled multi-element analysis without chemical sample preparation. The primary emission signal intensities of nickel, molybdenum, chromium, cobalt, and aluminum were statistically evaluated using mean values, standard deviations, coefficients of variation, interquartile ranges, confidence intervals, and boxplot analysis. The coefficients of variation ranged from 3.44% to 11.60%, indicating relatively low variability of the measured emission signals among the investigated blades. The lowest variability was observed for cobalt, nickel, and molybdenum, whereas chromium exhibited the highest dispersion. The results demonstrate a high degree of uniformity of the measured emission signals and indicate the potential of LA-MIP OES for comparative assessment of turbine blade materials.
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