Study on producing non-tapered holes with adaptively collimating high peak power pulsed Nd:YAG laser - Details

Author：

Jiang, Menghua (Jiang, Menghua.) | Li, Qiang (Li, Qiang.) (Scholars：李强) | Lei, Hong (Lei, Hong.) | Wang, Jinguo (Wang, Jinguo.) | Hui, Yongling (Hui, Yongling.)

Indexed by：

EI Scopus PKU CSCD

Abstract：

Experiments　of　laser　percussion　drilling　are　carried　out　on　nickel-based　superalloy　using　a　modified　pulsed　Nd:YAG　laser.　Peak　power,　pulse　energy　and　assist　gas　pressure　are　optimized　experimentally.　Experimental　results　demonstrate　that　a　pulse　combination　with　increasing　pulse　energy　is　an　effective　method　to　produce　non-tapered　holes.　Even　negative　taper　holes　can　be　produced　through　increasing　the　number　of　pulses　in　the　pulse　combination.　Focal　position　is　an　important　factor　that　affects　the　taper　of　holes,　and　1.1~1.7　mm　above　the　surface　of　the　sample　helps　reducing　the　taper　of　holes.　Non-tapered　holes　with　diameter　of　480　and　510　μm　are　drilled　on　nickel-based　superalloy　with　thickness　of　1.5　and　3.0　mm.　Variation　of　hole　diameter　is　about　30　μm,　and　hole　taper　is　less　than　1%.　A　feasible　method　of　producing　parallel　holes　and　an　applied　Nd:YAG　laser　have　been　presented　for　laser　percussion　drilling,　may　also　be　used　on　other　materials.

Keyword：

Nickel Infill drilling Superalloys Pulsed lasers Boreholes Neodymium lasers Musical instruments Yttrium aluminum garnet Nickel alloys

Author Community：

[ 1 ] [Jiang, Menghua]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Li, Qiang]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Lei, Hong]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Wang, Jinguo]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Hui, Yongling]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China