Aluminum 2024 and 7075 alloys which are widely used in aerospace and marine applications were chosen to investigate their strengthening mechanisms. Using differential thermal analysis (DIA), metallography and tension tests, the best solutionizing conditions were determined to be 500±5°C and 2 hours for 2024 and 480?±5°C and 1 hour for 7075 alloy. Aging was performed in the range of 100 to 200°C...

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...

Abstract Ultrasonic metal welding (USMW) has become considerable attention in terms of its suitable applications compared to conventional fusion techniques. The main advantage USMW results from the comparatively low process times and joining temperatures below melting point. Thus, is particularly used for dissimilar material combinations, e.g., aluminum copper (Al/Cu), battery cell production o...

Microstructure of commercial dental alloys and their amalgams were studied primarily by x-ray diffraction, optical metallography, scanning electron microscopy, and x-ray energy dispersive spectroscopy. X-ray diffraction revealed more phases than normally reported in these materials. Presence of new phase was discussed and their formation mechanism understood. Some phases having interacting 2 th...