Hello.

I recommend to following advises:

1) Both the base materials were thoroughly cleaned to remove contamination like rust, dust, oil and moisture to avoid welding defects that may arise due to any contamination of the base metal.

2) Chemical composition of the two grades of steel used for the study must investigated.

3) Microstructural development in the weld metal (WM) region for all specimens under different heat inputs seen through IPF (inverse pole figure) and phase maps. Microstructural features included elongated lamellar grains, serrated grain boundaries and mixed phase distribution of bcc (δ) and fcc (γ).

Good luck

Thanks.