| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 763472 | Engineering Failure Analysis | 2014 | 7 Pages |
•Cleavage fracture in thick steel plate occurred due to tensile stresses in the “Z” axis.•Rolled banded ferrite–pearlite microstructure and phosphorus segregations are characteristic.•Steel plate has a very good contraction in the “Z” axis.•Steel plate has a very low toughness in the central part.•After normalizing the toughness of the central part of the plate was highly improved.
Due to residual tensile stresses acting through the material’s thickness a cleavage fracture occurred in the central part of a thick steel plate during the cooling of a welded T-joint. Steel in the normalized rolled state, without non-metallic inclusions and with a very good contraction in the “Z” axis, is brittle because of its banded, ferrite–pearlite microstructure, which is dependent on phosphorus segregation. A normalizing heat treatment greatly improved the toughness of the central part of the thick plate and prevented its cracking during the cooling of the welded T-joint.
