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The deformation behaviour of a Ni-base single crystal superalloy is studied using a multiscale approach incorporating a recently-developed videography arrangement, allowing for full-field digital image correlation. Single crystal CMSX-4 in the ⟨001⟩ orientation was used to obtain a significant tensile dataset spanning temperatures from ambient to 900 °C and strain rates from 10-1 to 10-5 s-1. A multiscale approach was applied particularly to three strain rates at 800 °C, to determine transitions in the deformation mechanisms. It is demonstrated that the macroscopic deformation patterns correlate well with microscopic observations; moreover, the full-field strain mapping offers useful insights into the underlying shear and slip events. The strain rate sensitivity was particularly pronounced in the regime emphasised and evidence is presented for transitions in deformation mechanism within a single test as deformation proceeds.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Ni-base single crystal superalloy, Digital image correlation, In-situ tensile test, Strain rate sensitivity

Date published: 2026-01-15

Publisher: Springer Science and Business Media LLC

Journal:

• Metallurgical and Materials Transactions A (ISSN: 10735623) vol. 57 issue. 5 p. 1780-1793

Funding:

• 内閣府 (地方大学・地域産業創生交付金事業「先端金属素材グローバル拠点の創出−Next Generation TATARA Project」)

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

MDR DOI:

First published URL: https://doi.org/10.1007/s11661-025-08098-4

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Updated at: 2026-04-20 13:52:14 +0900

Published on MDR: 2026-04-20 16:27:32 +0900