Quality evaluation of precision micro holes drilled using pulsed Nd:YAG laser on aerospace nickel-based superalloy

Critical micron sized holes (<1mm) are highly demanded for improving the performance of the aviation engines. These holes are being manufactured either by Electric Discharge Machining (EDM) or by short pulsed laser. Nickel-based superalloys are generally used in technologically advanced industrie...

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Bibliographic Details
Published inMaterials today : proceedings Vol. 19; pp. 575 - 582
Main Authors Gurav, Mangesh M., Gupta, Umashanker, Dabade, U.A.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2019
Subjects
Microhardness
Pulsed Nd:YAG laser
Recast layer
Trepanning
Water Jet guided laser
Trepanning
Recast layer
Microhardness
Pulsed Nd:YAG laser
Water Jet guided laser
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Summary:Critical micron sized holes (<1mm) are highly demanded for improving the performance of the aviation engines. These holes are being manufactured either by Electric Discharge Machining (EDM) or by short pulsed laser. Nickel-based superalloys are generally used in technologically advanced industries like aerospace, nuclear and marine etc. The meeting of aerospace quality to such holes is challenging as the mentioned processes induced several defects because of intense thermal energy used for removal of material. This study is focused on quality evaluation of the holes drilled by pulsed Nd:YAG laser in conventional dry mode and water jet guided mode. Drilling has been carried out in trepanning mode to achieve better hole quality. The drilled holes are evaluated in some of stringent dimensional, form, surface roughness and metallurgical aspects. Water Jet guided laser (WJGL) drilled holes shows much improved quality as compared to conventional dry laser drilling and EDM drilling.
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2019.07.736