IHI Southwest Technologies (ISwT) provided Reactor Coolant System, Hot and Cold Leg Nozzle examinations in accordance with MRP-139, “Materials Reliability Program: Primary System Piping Butt Weld Inspection and Evaluation Guideline,” at the Robinson Nuclear Plant. During this outage volumetric inspections were performed using ultrasonic examination techniques qualified to meet the requirements ...

During friction stir lap joint welding, hooks are systematically formed at the interface of dissimilar Al2024/Ti-6Al-4V plates. Various dimensions and shapes observed according to welding parameters (welding speed, rotational speed double-pass). Based on digital image correlation (DIC) during tensile shear tests, it is found that features govern fracture behaviours and, hence, mechanical proper...

Abstract Ferrous alloys are employed in a range of fields, including aerospace, construction, automobiles and chemical processing. One the most used welding processes for fusion ferrous metals is gas tungsten arc (GTA) or Tungsten Inert Gas (TIG) welding. Due to lower amount penetration accomplished using only one pass, less frequent some industrial situations. Fluxes have been discovered impro...

Vaporizing foil actuator welding (VFAW), an impact method, was used for the first time to produce high strength welds between SiC-reinforced 8009 aluminum metal matrix composite (MMC) (8009/SiC/11p) and 7075 alloy (AA7075). Microscopic characterization of dissimilar weld revealed multiple heterogenous microstructural zones including unbonded zone at center, a flat interface, wavy trapped jet co...

The feasibility of friction stir welding to joining AC4CH semisolid cast aluminum alloy with 6061 plates was investigated, including the influence condition on mechanical properties joints. Excessive heat input conditions high tool rotational speed and low result in formation large burrs. Although hardness zone is scarcely affected by condition, as 1mm/s makes heat-affected zones both sides sof...