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Nano-mechanical properties of novel intermetallic coatings on 316L bioimplant material

In the present work, Nano-mechanical properties of intermetallic layer formed on 316L austenitic stainless steel have been investigated. Hot dip aluminizing technique applied on stainless steel samples for coating and composition of Al-Si alloys maintained as 8%, 10%, 12% and 14%. Nano-mechanical properties of the Intermetallic formed have been evaluated using Nano-indentation technique at room temperature and results were compared. On the basis of our observations and obtained results it is concluded that with increasing silicon percentage the thickness of the intermetallic layer increases. However, the Nano-mechanical results showed that this layer is brittle in nature. Therefore, it can be inferred that for bio-implant application the thickness of the layer needs to be at lower level as possible.