Near - surface work-hardening of wares with complex shapes using a composite schemes of deformation

 
S.E.Shejkin,
    
N.Rudik,
 
C.F.Studenets,
 
D.A.Sergach,
 
А.G.Raab
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Electron Microscopy and Strength of Materials - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2013, #19
http://www.materials.kiev.ua/article/762

Abstract

Results of gradient hardening of steel and titanium billets strengthening by surface severe plastic deformation are proposed. Surface strengthening obtained by different methods: polling with rotation; asymmetric knurling or reduction with polling. It is shown that coincidence deformation obtained by application of some different schemes give essential rise of hardening. Cooling of machining surface may increase hardening, too. Strengthening effects may be considerably explained by mechanism of structural formation under combined technologies of surface plastic deformation. Full text download


GRADIENT DEFORMATION STRUCTURE, MICROHARDNESS., NEAR-SURFACE SEVERE DEFORMATION