Generating 60nm thickness along the grain boundaries of a microstructure

I generated a microstructure (5 x 5 x 2 micrometer)  using Abaqus input file (attached).  But the microstructure does not have

grainboundary thickness.

 

I would like to generate thickness (60nm) along the grain boundaries using hypermesh.

 

Could you help me generating 60nm thickness along the grain boundaries?

 

Thank you

 

 

 Operating System and Version:                Windows 10

 

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