AISI 321 stainless steel has excellent resistance to intergranular corrosion and is generally used in nuclear power reactor vessels other components. The as-cast wrought structures are quite different hot workability, so physical simulation, electron back-scatter diffraction, processing maps were study the mechanical behavior microstructure evolution of grade temperature range 900–1200 °C strai...

combined pet/ct scanners now play a major role in medicine for in vivo imaging in oncology, cardiology, neurology, and psychiatry. as the performance of a scanner depends not only on the scintillating material but also on the scanner design, with regards to the advent of newer scanners, there is a need to optimize acquisition protocols as well as to compare scanner performances on an objective ...

Superalloys are metallic alloys used for high temperature applications such as encountered in the aircraft industry and where resistance to deformation is a primary requirement. Alloy 718 and waspaloy are few examples of Nickel-base superalloys that resist deformation at elevated temperatures and are therefore difficult to hot work. The major hotworking operations are forging, extrusion, and ro...

In the present work, a combined process of laser powder bed fusion (LPBF) and hot working in terms microstructure refinement was investigated for Fe-25Al-1.5Ta alloy samples. Uniaxial compression tests were carried out parallel perpendicular to building direction (BD) at 1000 °C, where BCC A2-phase stable, strain rate 0.0013 s−1. The true stress–true curves indicated broad flow stress peak foll...

Neste trabalho, reações entre a perovskita LaMnO 3,15 e Fe foram promovidas pelo tratamento térmico da mistura Fe/LaMnO 3,15 a 200, 400 e 600 C. Análises por espectroscopia Mössbauer, difração de raios X (DRX), redução em temperatura programada (TPR) e desorção em temperatura programada (O 2 -TPD) sugerem que a 400 C e a 600 C a perovskita transfere oxigênios para o Fe, produzindo uma perovskit...