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Understanding the precise elastic modulus of individual γ and γ′ phases is crucial for estimating the elastic misfit between these phases, because it is a key factor in controlling the formation of raft structures and local stress/strain around γ′ precipitates. Despite its importance, research in this area remains limited. This study determines the elastic modulus of 6th generation Ni-base single crystal superalloy TMS-238 and its tie-lined γ and γ phases under equilibrium conditions above 900 °C. We fabricated TMS-238 and its tie-lined alloys with varying γ′ volume fractions. Using the rectangular parallelepiped resonance (RPR) method, we measured the elastic modulus from room temperature to 1100 °C. Elastic moduli between tie-lined phases were then estimated above 900 °C using composite models. Our findings were compared with those of Ni-Al binary alloys, Ni-Al-X ternary alloys, and multi-component systems, providing a comprehensive understanding of the elastic properties.

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• Creative Commons BY Attribution 4.0 International
  

Keyword: Elastic moduli

Date published: 2025-04-29

Publisher: Elsevier BV

Journal:

• Materials Science and Engineering: A (ISSN: 09215093) vol. 941 148410

Funding:

• Advanced Low Carbon Technology Research and Development Program JPMJAL1302
• New Energy and Industrial Technology Development Organization JPNP21007
• Japan Science and Technology Corporation
• New Energy and Industrial Technology Development Organization
• Japan Science and Technology Agency

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

MDR DOI:

First published URL: https://doi.org/10.1016/j.msea.2025.148410

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Updated at: 2025-12-19 16:30:16 +0900

Published on MDR: 2025-12-19 14:11:47 +0900