AWS Welding Metallurgy & Materials Flashcards
6 cards from real Uncategorized practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 AWS Welding Metallurgy & Materials flashcards as text
What is the heat-affected zone (HAZ) in welding?
Answer: Area of base metal altered by heat
The heat-affected zone is the area of base metal that was not melted but whose mechanical properties and microstructure were altered by the heat of welding.
Which metal is most prone to hydrogen-induced cracking during welding?
Answer: High-strength steel
High-strength steels are particularly susceptible to hydrogen-induced cracking due to their hardness and microstructure.
What is the function of preheating in welding?
Answer: Minimizes risk of cracking
Preheating reduces the cooling rate of the weld and surrounding base metal, helping to prevent cracking and hydrogen entrapment.
What type of stainless steel is most commonly used in welding applications?
Answer: Austenitic
Austenitic stainless steels, such as 304 and 316, are widely used due to their corrosion resistance and weldability.
Which welding defect is typically caused by contamination or improper shielding gas?
Answer: Porosity
Porosity is a common defect caused by gas entrapment, often due to moisture, dirt, or poor shielding during welding.
Which material requires special attention due to high thermal conductivity and oxidation potential during welding?
Answer: Aluminum
Aluminum has high thermal conductivity and forms an oxide layer that must be removed for proper fusion.