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Tutorial: Weldability of Aluminum – Alumina (Aluminum Oxide, Al₂O₃)3
In this tutorial, we will discuss the phenomena that occur in aluminum when the welding process is not properly selected and the effects that exposure to the surrounding environment—particularly oxygen—has on the material. This interaction leads to the formation of aluminum oxide (Al₂O₃), commonly known as alumina.
We will also explain the importance of understanding the electrical engineering principles and process variables associated with welding, as they play a critical role in achieving sound weld quality, proper oxide removal, and reliable welding performance.
Tutorial: Weldability of Stainless Steels – Sensitization (Part 2)
In this tutorial, we will discuss the phenomenon of sensitization that occurs during the welding of stainless steels, its theoretical principles, and its effects on the material's corrosion resistance.
We will explain how sensitization develops, the metallurgical mechanisms involved, the conditions that promote its occurrence, and its impact on the corrosion performance of stainless steel weldments. Understanding this phenomenon is essential for selecting the appropriate materials, welding procedures, and heat input to preserve the corrosion resistance and long-term integrity of welded components.
Tutorial: Stainless Steel Weldability – Hot Cracking (Part 1)
In this tutorial, we will discuss the mechanisms that lead to hot cracking in stainless steels during welding. We will explain how the improper selection of the filler metal, an unsuitable chemical composition of the base metal and/or filler metal, and other metallurgical factors can contribute to the formation of cracks during the welding process.
The tutorial will cover the theoretical principles of hot cracking, the conditions that promote its occurrence, its effects on weld integrity, and the engineering considerations required to prevent this type of discontinuity through proper material selection and welding procedure control.