1. peening - Noun
2. peening - Verb
English Wikipedia has an article on:peeningWikipedia
peening (countable and uncountable, plural peenings)
The hardening of a metal surface by hammering, or by blasting with shot
peening
present participle of peen
Shot peening adds an additional layer of hardness to the re-manufactured crankshaft. Source: Internet
Step 16: Shot peening The next step is to process the industrial crankshaft in using shot peen machinery. Source: Internet