Question

4. It is required to drl 0.3 mm diameter holes in a nickel sheet using a pulsed Nd:YAG 2nd harmonic laser with a 9 kW peak power output. How long will it take to reach the melting point on the top surface? a. b. How long will it take to reach the boiling point at the surface so hole drilling can begin?

Answer 1

0) Assume hom tey; d ( hadiiu) - I.rxlom ほ00-300 AT= 1400 K Tine右heah molting temp. Tm=Foo I- 0-65)- 4.45 xlo m TTa 2 (400x 0. q0 0 2324 Tv 3110-300 2810 k So, tv- 2 2x y.ys XloG 02324