Narrow-gap groove wall inclination
The tendency of filler wires to deform and neck in the direction of stress. This leads to weld defects and reduced mechanical properties.
Physical-Chemical Mechanism of Action
Narrow-gap groove wall inclination is a phenomenon where the groove wires deform under stress in the direction of the stress vector and contract tightly together. This happens through micromechanical deformations and body shear processes at the groove boundaries.
Metallurgical Relevance & Welding Risks
The tendency for narrow-gap groove wall deformation can lead to various weld defects, such as stress distribution problems and reduced mechanical properties of the weld. This increases the risk of cracks and reduces the strength of the joint.
Shop Practice & Action Guidelines
To minimize narrow-gap groove wall inclination, it's important to ensure correct stress application. This includes using suitable stress joints and adhering to prescribed stress values. Also, the weld should be designed to have enough room for deformation without being too tight. For high-stress applications, it's advisable to do an extra check on the stress application.