Three-dimensional morphology of an ultrafine Al-Si eutectic produced via laser rapid solidification

Zhou, Xinyi; Chao, Paul; Sloan, Luke; Lien, Huai-Hsun; Hunter, Allen H.; Misra, Amit; Shahani, Ashwin J.

doi:10.1016/j.scriptamat.2023.115471

Three-dimensional morphology of an ultrafine Al-Si eutectic produced via laser rapid solidification

Journal Article · Tue Apr 11 00:00:00 EDT 2023 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2023.115471· OSTI ID:2420588

Zhou, Xinyi ^[1]; ^[2]; ^[2]; Lien, Huai-Hsun ^[2]; Hunter, Allen H. ^[2]; Misra, Amit ^[2]; Shahani, Ashwin J. ^[2]

Univ. of Michigan, Ann Arbor, MI (United States); OSTI
Univ. of Michigan, Ann Arbor, MI (United States)

Al-Si alloys processed by laser rapid solidification yield eutectic microstructures with ultrafine and interconnected fibers. Such fibrous structures have long been thought to bear resemblance to those formed in impurity-doped alloys upon conventional casting. Here, we show that any similarity is purely superficial. By harnessing high-throughput characterization and computer vision techniques, we perform a three-dimensional analysis of the branching behavior of the ultrafine eutectic and compare it against an impurity-modified eutectic as well as a random fractal (as a benchmark). Differences in the branching statistics point to different microstructural origins of the impurity- and quench-modified eutectic. Finally, our quantitative approach is not limited to the data presented here but can be used to extract abstract information from other volumetric datasets, without customization.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0016808

OSTI ID:: 2420588

Alternate ID(s):: OSTI ID: 1971186

Journal Information:: Scripta Materialia, Journal Name: Scripta Materialia Vol. 232; ISSN 1359-6462

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Three-dimensional morphology of an ultrafine Al-Si eutectic produced via laser rapid solidification

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