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March 13, 2026SHILAP Revista de lepidopterologíaOpen Access

Single-track investigation of rapid solidification conditions of Hastelloy-X Ni-based superalloy in laser powder-bed fusion and applicability of columnar equiaxed transition criteria

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Authors

MOMasayuki OkugawaHYHaruki YoshimaYLYuheng Liu

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Overview

Investigates solidification conditions of Hastelloy-X in powder-bed fusion, indicating implications for microstructure control.

Key Points

  • The aim is to understand how the columnar-equiaxed transition (CET) criteria apply to Hastelloy-X during rapid solidification in additive manufacturing.
  • Conducted experimental observations of the microstructure and solidification conditions of Hastelloy-X.
  • Performed computational thermal-fluid dynamics simulations to analyze the cooling conditions during laser powder-bed fusion.
  • Measured temperature gradients and solidification rates during the manufacturing process.
  • Columnar crystals were formed in the melt region of the Hastelloy-X superalloy.
  • Solidification conditions were out of the range typically used for microstructure control.
  • The microstructural morphology matched predictions based on CET criteria, enhancing understanding of microstructure control.

Cite This Study

Okugawa et al. (2026) studied this question.

synapsesocial.com/papers/69b3ac2b02a1e69014ccda18https://doi.org/10.1080/17452759.2026.2639906
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