{TAIL ~ The surface area} of {HEAD ~ a metallic substrate} may first be painted with a paint material suitable to generate the plasma, which results in shock waves to form the region having deep compressive residual stresses 
{ TAIL ~ The surface area } of { HEAD ~ a metallic substrate } may first be painted with a paint material suitable to generate the plasma , which results in shock waves to form the region having deep compressive residual stresses
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH