In:
Applied Optics, Optica Publishing Group, Vol. 61, No. 11 ( 2022-04-10), p. 2929-
Abstract:
We construct a numerical model
for multipulse laser drilling. It is found that the previous laser-pulse-induced temperature accumulation, thermal stress
occurrence, and crater morphology change promote subsequent pulse laser drilling. Among them, previous laser-pulse-induced temperature
accumulation contributes significantly to the drilled crater depth when the workpiece temperature is higher than its melting point just
before the subsequent laser pulse irradiation, especially in a short pulse interval condition. The crater morphology change becomes the
main contributor when the workpiece temperature decreases below the melting point, often in a long pulse interval condition. Besides, the
previous occurrence of laser-pulse-induced thermal stress always has had little influence on the drilled crater. This work can be a
theoretical reference, especially for multipulse laser manufacturing.
Type of Medium:
Online Resource
ISSN:
1559-128X
,
2155-3165
Language:
English
Publisher:
Optica Publishing Group
Publication Date:
2022
detail.hit.zdb_id:
207387-0
Permalink