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Description:

Mechanical testing featuring miniaturised specimens are resource-efficient alternative to standardised testing that can offer unparalleled insights. In this work, the established electro-thermal mechanical testing (ETMT) procedure was used for evaluating potential damage to microstructure given by unexpected thermal/mechanical load. Two conceptualised scenarios were considered. The first case concerns property deterioration given long-term complex exposure of temperature and stress for a turbine blade. The second case concerns an ‘accidental’ solution treatment at near-incipient melting temperature. Quasi-static and dynamic tests were carried out to pick up potential property change against the reference condition. For the reference microstructure, low cycle fatigue was shown successful in yielding reproducible fatigue life and pick up location dependent hardening response between suction vs pressure side of a turbine blade. The property difference, given each scenario, was benchmarked accordingly and rationalised with microscopic evidence.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Ni-base single crystal superalloy, Turbine blade, Heat treatment, Miniature tensile test

Date published: 2026-01-14

Publisher: Springer Science and Business Media LLC

Journal:

• Metallurgical and Materials Transactions A (ISSN: 10735623) vol. 57 issue. 5 p. 1766-1779

Funding:

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1007/s11661-025-08096-6

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Updated at: 2026-04-20 13:39:52 +0900

Published on MDR: 2026-04-20 16:27:33 +0900