brief biography
My name is Ali Ahmed Elasheri , i'm 24 years old , I graduated from faculty of engineering-Cairo university in may 2013 from the department of material science and metallurgical engineering , and i have been working as a teaching assistant at the same department since October 2013. My research point is the studying the effect of the nitrogen composition in shielding gas and backing gas on the properties of welded metal ( super duplex stainless steel and super austentic stainless steel ).