Effect of Shot Peening on the Mechanical Properties and Cytotoxicity Behaviour of Titanium Implants Produced by 3D Printing Technology

Table 1

Parameters of shot for shot peening.

Shot	Typical chemical composition (%)		Average grain size (μm)	Grain shape	Hardness
Stainless steel shot – CrNi	Cr	16–20	400–900	Spherical	235 HV
	Ni	7–9
	Si	1.8–2.2
	Mn	0.7–1.2
	C	0.05–0.2
	Fe	Bal.
Nutshell granules	Nonferrous, organic blasting media		450–800	Angular	Approx. 2.5–3.5 mohs
Ceramic beads	ZrO2	61.98	125–250	Spherical	Approx. 7–7.5 mohs
	SiO2	27.77
	Al2O3	4.57
	CaO	3.47
	TiO2	0.34
	Fe2O3	0.14