What does the term CVN stand for in welding terms?

The term CVN stands for Charpy V-Notch, which is a standard test used in welding and materials science to determine the impact toughness of materials. The Charpy test measures how much energy a material can absorb before fracturing, which is particularly important in assessing the performance of welded joints, especially under conditions that could expose them to low temperatures or high-stress environments.

In this test, a notched specimen is struck by a swinging pendulum, and the energy absorbed in breaking the specimen is measured. The presence of the notch creates a stress concentration, simulating conditions that might be encountered in real-world applications. Understanding the CVN value of a welded joint is essential, as it helps engineers and welding professionals ensure that materials will perform adequately in their intended use, especially in structural applications.

The other options do not relate to the established terminology used in welding contexts, which is why they are not the correct choice.