Look up: peening

1. Peening
   The mechanical working of metals by means of hammer blows. Peening tends to stretch the surface of the cold metal, thereby relieving contraction stresses.
   Found on http://www.diracdelta.co.uk/science/sour
   
   
2. Peening
   A stream of sharp material particles which break superficial fibres, reducing internal stress fields.
   Found on http://www.poeton.co.uk/w1/glossary.htm
   
   
3. peening
   technique which consists in deforming a metal part by a series of hammer blows,for example to set a rivet or burr end of bolt to prevent loss of the nut Category: Transport • mechanical working of metal by hammer blows or shot impingement Category: Iron and steel industries
   Found on http://www.mijnwoordenboek.nl/definition
   
   
4. Peening
   The stretching of metal by hammering or rolling the surface.
   Found on http://www.encyclo.co.uk/local/21038
   
   
5. Peening
   A technique of blasting the surface of metal with shot. Improves appearance and hardens the surface.
   Found on http://www.metalbulletin.com/Glossary.ht
   
   
6. Peening
   `Peening` is the process of working a metal`s surface to improve its material properties, usually by mechanical means such as hammer blows or by blasting with shot (shot peening). Peening is normally a cold work process (date=January 2011-->). It tends to expand the surface of the cold metal, thereb...
   Found on http://en.wikipedia.org/wiki/Peening