| dc.description.abstract | Abstract. Dynamic Compression Plate (DCP) is a plate made of biomaterials like stainless steel
316L (SS-316L) or titanium, which is used for joining fractured/broken bones for fast recovery.
Due to its excellent properties on corrosion, toughness, and hardness; SS-316L is widely used for
medical application. Despite its excellent properties, the surface of SS-316L commonly degraded
after machining. Therefore, the surface of SS-316L needs to be treated before further use. Shot
peening is one of the methods to increase the surface hardness and roughness of material. This
research aims to investigate the effect of shot peening to the surface of DCP made of SS-316L from
its microstructures, surface roughness, and hardness. In this research, the DCP is designed for
joining arms, which are upper-arm (humerus) and forearm (radius and ulna). First we machined the
DCP to have holes and bend the plate to match the user bone structure. The DCP is 105 mm × 12
mm × 4 mm in dimension and has 6 holes, 5 mm diameter each, with holes aligned to the plate.
After machining, the surface is modified by shot peening using following properties: steel ball (0.4
mm in diameter and hardness 250 HV), 100 mm nozzle-to-plate distance, and shot for 10 minutes.
Our parameters are variations in pressure, ranging from 4 to 6 bar. The microstructure of the treated
surface was analyzed after shot peening. The result shows that the shot peening treatment of SS-
316L has increases its surface hardness and roughness with significant change on its microstructure,
which makes a better surface characteristics for DCP. | en_US |
