| 摘要 |
According to an embodiment of the present invention, a Y-shaped groove test piece includes: a first test piece which has a first test welding part formed in the central area and having a root surface 1-1 and a groove surface 1-2 and which has a first restraint welding part formed in the central area and having a root surface 1-3 and a groove surface 1-4; a second test piece which has a second test welding part formed in the central area, having a root surface 2-1 and a groove surface 2-2, and formed to symmetrically face the root surface 1-1 and the groove surface 1-2 of the first test welding part and which has a second restraint welding part formed in the outer area except for the central area, having a root surface 2-3 and a groove surface 2-4, and formed to symmetrically face the root surface 1-3 and the groove surface 1-4 of the first restraint welding part. The first and second test welding parts maintain a predetermined root gap. |
