Study on Crack Behavior of GH3230 Superalloy Fabricated via High-Throughput Additive Manufacturing

Autor: Xiaoqun Li, Yaqing Hou, Weidong Cai, Hongyao Yu, Xuandong Wang, Fafa Li, Yazhou He, Dupeng He, Hao Zhang
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Materials, Vol 17, Iss 17, p 4225 (2024)
Druh dokumentu: article
ISSN: 1996-1944
DOI: 10.3390/ma17174225
Popis: This study utilized Fe, Co, Ni elemental powders alongside GH3230 pre-alloyed powder as raw materials, employing high-throughput additive manufacturing based on laser powder bed fusion in situ to alloying technology to fabricate the bulk samples library for GH3230 superalloy efficiently. A quantitative identification algorithm for detecting crack and hole defects in additive manufacturing samples was developed. The primary focus was to analyze the composition variations in specimens at varying Fe, Co, and Ni elemental compositions and their impact on crack formation. Experimental results demonstrated that increased laser power improved element distribution uniformity but it proved to be not significantly effective in reducing crack defects. Moreover, augmented Fe and Co alloying content could not eliminate these defects. However, elevated Ni content led to a decrease in the alloy’s solidification cracking index and carbide reduction in solidification products. Notably, a significant reduction in cracks was observed when the Ni content of the alloy reached 63 wt.%, and these defects were nearly eliminated at 67 wt.% Ni content.
Databáze: Directory of Open Access Journals
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