Research and Reports on Metals

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Okan Unal Author

unalokan78@gmail.com 90 370 433 20 21 | 90 370 433 2

Subjects of specialization
Nanostructured layer,Severe plastic deformation,Severe shot peening

Affiliation
Mechanical Engineering Department, Karabuk University, Karabuk, 78050, Turkey

Biography

Nanostructured materials have been assessed as crucial for metallurgical, industrial and biological environments [1-3]. These materials have been manufactured with two methods, one is bottomup and the other is top-down. Defects; Deformation and fracture; Severe shot peening; Severe plastic deformation; SMAT; Nanostructured layer Mechanical Engineering Department, Karabuk University, Karabuk, 78050, Turkey

Publications

Research Article Open Access

Surface Nanostructuring of AISI 1017 by Severe Shot Peening

Author(s):

Okan Unal, Remzi Varol

In this study, AISI 1017 low carbon steel was subjected to severe shot peening (SSP) by using 35mmA Almen intensity. SSP led to surface severe plastic deformation by the impingement of the shot media with very high air pressure. 40-50 µm highly deformed nanograin layer was formed right below the surface by means of sub grain creation with dislocation interaction and non-homogenous strain. Nanoindentation tests were performed to detect the hardness and reduced modulus of fine grained layer and the results reveal the hardness increased up to almost 1,5 times with compared to core. The reduced modulus is also influenced from very hard nanocrystalline layer.

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