Fibre Laser Cutting and Chemical Etching of AZ31 for Manufacturing Biodegradable Stents

Table 4

Chemical composition of the semi-finished hollow tubes in comparison with the stents laser microcut using Ar, before and after chemical etching.

wt %	Semi-finished hollow tube	After laser microcutting with Ar		After chemical etching
	External surface	External surface	Wall	External surface	Wall
Al	3.88	1.9±0.4	1.3±0.6	4.2±0.8	2.1±0.3
Zn	0.98	0	0	1.4±0.2	0.3±0.4
Mg	95.14	98.1±0.4	98.7±0.6	94.4±0.6	97.6±0.1