PSI - Issue 81

Valeriy Lazaryuk et al. / Procedia Structural Integrity 81 (2026) 529–535

533

The combined effect of laser power and scanning speed on defect formation in scribed grooves can be expressed through the linear energy input, defined as E lin = P / v, which represents the energy delivered per unit length of the laser path. A similar idea has been used in studies of laser scribing of composite materials, where the stability of the process and the extent of thermal damage are determined by the local heat input per unit length (Hintze et al., 2016).

a)

b)

c)

d)

e)

f)

g)

h)

Fig. 8. Groove width (GW) and heat-affected zone width (HAZW) as functions of scanning speed (V) at different laser powers (P): (a – g) experimental dependencies; (h) comparison of regression slopes for GW (K GW ) and HAZW (K HAZW ) at the corresponding power levels.