By -
Date 04-22-2001 19:13
At the best of times peening is less than satisfactory, because there is so little control that one has over the process. (Possibly if one peens with steel shot, a small degree of repeatability can be assured.) Often, peening produces more problems than solutions.
Also, I think that with Hadfield manganese steel, you will be working against yourself, because of the extrememy high work hardening rate of this steel. These steels are generally used where abrasion impact conditions are present. In the as-welded condition the deposits are not very hard, but as it experiences impacts it tends to harden substantially. If you therefore want to reduce stresses in your Hadfield weld, you should not expose it to any cold deformation. (e.g. Peening)
Why do you want to reduce the weld stresses in any case? You may have other problems that are not related to weld residual stresses! (This we could obviously not know.)
Regards
Niekie