Inspectioneering Journal

Effect of High Temperature Hydrogen Attack in Dissimilar Materials

By Samer E. Ibrahim, Academic Researcher at Robert Gordon University. This article appears in the May/June 2018 issue of Inspectioneering Journal.


Dissimilar materials are welded in many industrial and manufacturing applications.  During welding, the mechanical and chemical properties of the metals involved need to be considered for the various welding qualification records.  The properties of the two metals being joined (the base metals) need to be compatible and similar to the filler metal, which is used to weld them together (creating a transition zone known as the heat affected zone).  Therefore the development of a welding qualification procedure for dissimilar materials welding processes typically requires more research compared to the process for welding similar materials.1

In this investigation, the importance of some factors for welding dissimilar metals, such as material selection, electrode selection, and the operational variables are discussed.  Additional considerations include the type of application and the environment where the dissimilar weld will operate and its impact on the long term performance of the materials and the dissimilar weld.

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Comments and Discussion

Posted by Nathaniel Griffen on June 29, 2018
It seems like this article blames the dissimilar... Log in or register to read the rest of this comment.

Posted by Samer Ibrahim on July 25, 2018
Thanks Nathaniel Griffen for your comment, And... Log in or register to read the rest of this comment.

Posted by Scott Dufault on August 14, 2018
Samer: Thank you for your article. I noticed... Log in or register to read the rest of this comment.

Posted by Samer Ibrahim on August 14, 2018
Thanks Scott for the note, Here is my reply: 1-... Log in or register to read the rest of this comment.

Posted by Mohamed Ebaid on October 18, 2018
Thanks Mr. Same for your article Log in or register to read the rest of this comment.

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