In-situ study on grain refinement mechanism of Al-13Cu alloys modified by high entropy alloy particles and ultrasonic treatment.

ABSTRACT: This study explores the grain refinement mechanisms of primary α-Al during solidification of Al-13 wt% Cu alloy modified by FeCoCrNiAl high-entropy alloy (HEA) particles via ultrasonic treatment. In situ X-ray radiography combined with machine learning-based computer vision techniques was employed to systematically analyze the nucleation and growth behaviors of α-Al grains. Results indicate a significant grain refinement effect associated with increased HEA particle content and higher cooling rates. Specifically, the addition of 2.0 wt% HEA particles reduce the primary α-Al grain size notably, achieving approximately 213 μm at a cooling rate of 1.0 K/s. At a cooling rate of 0.2 K/s, raising the HEA content from 0.5 to 2.0 wt% markedly increases the maximum nucleation rate (from 8.6 to 30.3

SUBMITTER: Cao Y 

PROVIDER: S-EPMC12423412 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature