Insights into the high-speed electrochemical discharge drilling for film cooling hole: Machining phenomena, morphological evolution, and visualize simulation

Geng, Tianyu; Xu, Zhengyang; Lu, Jiangwei; Ning, Jin; Yang, Zongju

doi:10.1016/j.ijmachtools.2024.104126

Cited by 8 publications

(1 citation statement)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Currently, Gao et al [12] have investigated the machining of thermal barrier coating lm cooling holes by presenting a composite approach of electric discharge machining and abrasive water jet. Geng et al [13] proposed a back ush electrochemical discharge machining technique to address recast layers and fractures, resulting in high-quality lm cooling holes. Geng et al [14] investigated the recast layer and elemental distribution after lm cooling hole machining using ECDM, while Liu et al [15] examined gas lm purity and consistent discharge energy distribution with ECDM.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of electrochemical discharge machining on film cooling holes with thermal barrier coatings

Zhang,

Chen,

et al. 2024

Preprint

View full text Add to dashboard Cite

This paper investigates the electrochemical discharge machining (ECDM) mechanism to address the susceptibility of coatings to cracking, delamination, microcracks, and recast layers during the machining of film cooling holes with thermal barrier coatings. By using NaOH as the working fluid and enhancing chip removal through electrode rotation, this study investigates the machining state transition laws, material removal mechanisms, and post-processing workpiece surface integrity in ECDM of film cooling holes with thermal barrier coatings. The results indicate that only the electrochemical discharge effect is active during the ECDM of the ceramic layer, with material removal primarily dependent on rapid thermal cycling and electrochemical discharge. In contrast, for metal substrates, both electrochemical and electrical discharge machining occur, involving electrochemical and thermal effects. This study provides valuable insights for the efficient and high-quality production of film cooling holes with thermal barrier coatings.

show abstract