Dense volumes of duplex stainless steel are manufactured by directed energy deposition. Compact tension specimens machined from these in order to evaluate the fracture toughness two directions : parallel or perpendicular deposited layers. Different values measured cases. In understand this anisotropy, additional analyzes performed on cracked post-mortem. A classical metallography analysis revea...

The morphologies and defect structures of TiCr2 in several Ti-Cr alloys have been examined by optical metallography, x-ray diffraction, and transmission electron microscopy (TEM), in order to explore the room-temperature deformability of the Laves phase TiCr 2. The morphology of the Laves phase was found to be dependent upon alloy composition and anneating temperature. Samples deformed by compr...

Terms of service of the steels with retained austenite in the microstructure, is severely depended on the stability of austenite during the course of deformation. The present work aims to evaluate the mechanical stability of austenite in nanostructured, carbide free bainitic steels during tensile testing and cold rolling process. To achieve the microstructure with retained austenite, the steel ...

Clinching is the manufacturing process of joining two or more metal sheets under high plastic deformation by form and force closure without thermal support auxiliary parts. Clinch connections are applicable to difficult-to-join hybrid material combinations, such as steel aluminum. Therefore, this technology interesting for application AISI 304 components, widely used a highly formable sheet mat...

Additive technologies provide a means for repair of various failure modes associated with material degradation occurring during use in aggressive environments. Possible strategies AISI 4340 steel using 316L deposited by additive friction stir deposition (AFSD) were evaluated under this research metallography, microhardness, and wear mechanical testing. Two geometries investigated: groove-fillin...