Search results
Results From The WOW.Com Content Network
Lamellar tearing is a welding defect that occurs in rolled steel plates that have been welded together in a way that creates shrinkage forces perpendicular to the faces of the plates and is caused mainly by sulfurous inclusions in the material. [24]
A casting defect is an undesired irregularity in a metal casting process. Some defects can be tolerated while others can be repaired, otherwise they must be eliminated. They are broken down into five main categories: gas porosity, shrinkage defects, mould material defects, pouring metal defects, and metallurgical defects.
Therefore, if liquid material is not available to compensate for this shrinkage a shrinkage defect forms. [3] When progressive solidification dominates over directional solidification a shrinkage defect will form. [2] The geometrical shape of the mold cavity has a direct effect on progressive and directional solidification.
Engineering Critical Assessment (ECA) is a procedure by which the safety of a welded structure with defects or flaws can be determined. ECAs utilize the material properties and expected stress history to determine a flaw acceptance criteria which will ensure that welds will not fail during the construction or service life of the welded structure. [1]
Shrinkage (accounting), loss of product inventory due to theft, damage, spoilage, etc. Shrinkage defect or shrinkage void, a casting defect caused by metal solidifying from the outside inward; Shrinkage (statistics), a technique to improve an estimator; Shrinkage (slang)
In welding, equivalent carbon content (C.E) is used to understand how the different alloying elements affect hardness of the steel being welded. This is then directly related to hydrogen-induced cold cracking , which is the most common weld defect for steel, thus it is most commonly used to determine weldability .
A bronze casting showing the sprue and risers. A riser, also known as a feeder, [1] is a reservoir built into a metal casting mold to prevent cavities due to shrinkage.Most metals are less dense as a liquid than as a solid so castings shrink upon cooling, which can leave a void at the last point to solidify.
Weld mapping is the process of assigning information to a weld repair or joint to enable easy identification of weld processes, production (welders, their qualifications, date welded), quality (visual inspection, NDT, standards and specifications) and traceability (tracking weld joints and welded castings, the origin of weld materials).