Stainless steel weld metal designed to mitigate residual stresses

Shirzadi, A. A.; Bhadeshia, H. K. D. H.; Karlsson, L. and Withers, P. J. (2009). Stainless steel weld metal designed to mitigate residual stresses. Science and Technology of Welding & Joining, 14(6) pp. 559–565.



There have been considerable efforts to create welding consumables which on solid state phase transformation partly compensate for the stresses which develop when a constrained weld cools to ambient temperatures. All of these efforts have focused on structural steels which are ferritic. In the present work, alloy design methods have been used to create a stainless steel welding consumable which solidifies as δ ferrite, transforms almost entirely into austenite which then undergoes martensitic transformation at a low temperature of about 220C. At the same time, the carbon concentration has been kept to a minimum to avoid phenomena such as sensitisation. The measured mechanical properties, especially toughness, seem to be significantly better than commercially available martensitic stainless steel welding consumables, and it has been demonstrated that the use of the new alloy reduces distortion in the final joint.

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