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Methods of weld testing and analysis are used to assure the quality and correctness of the weld after it is completed. This term generally refers to testing and analysis focused on the quality and strength of the weld but may refer to technological actions to check for the presence, position, and extent of welds.
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]
Quality requirements of welded joints depend on the form of application, e.g. in the space or fly industry weld errors are not allowed. [1] Science try to gets good quality welds. There are many scientific articles describing the weld test, e.g. hardness, [2] [3] [4] tensile tests. [3]
The weldability, also known as joinability, [1] of a material refers to its ability to be welded. Many metals and thermoplastics can be welded, but some are easier to weld than others (see Rheological weldability). A material's weldability is used to determine the welding process and to compare the final weld quality to other materials.
Welding - Welding of reinforcing steel - Part 1: Load-bearing welded joints ISO 17660-2: Welding - Welding of reinforcing steel - Part 1: Non-load bearing welded joints ISO/TR 20172: Welding — Grouping systems for materials — European materials ISO/TR 20173: Welding — Grouping systems for materials — American materials ISO/TR 20174
[1] [2] The process of wire drawing changes material properties due to cold working. The area reduction in small wires is generally 15–25% and in larger wires is 20–45%. [1] The exact die sequence for a particular job is a function of area reduction, input wire size and output wire size. As the area reduction changes, so does the die ...
Means that a feature of size is at the limit of its size tolerance in the direction that leaves the most material on the part. Thus an internal feature of size (e.g., a hole) at its smallest diameter, or an external feature of size (e.g., a flange) at its biggest thickness. The GD&T symbol for MMC is a circled M.
In the scan images, the good weld appeared as a uniform line. The defective welds exhibited various discontinuities and a non-uniform appearance. Mechanical testing of the welds showed a marked decrease in properties, with reductions in the yield stress of one-third to one-half the value of the good weld.