RESUMO
An unmodified, non-spherical, hydride-dehydride (HDH) Ti-6Al-4V powder having a substantial economic advantage over spherical, atomized Ti-6Al-4V alloy powder was used to fabricate a range of test components and aerospace-related products utilizing laser beam powder-bed fusion processing. The as-built products, utilizing optimized processing parameters, had a Rockwell-C scale (HRC) hardness of 44.6. Following heat treatments which included annealing at 704 °C, HIP at ~926 °C (average), and HIP + anneal, the HRC hardnesses were observed to be 43.9, 40.7, and 40.4, respectively. The corresponding tensile yield stress, UTS, and elongation for these heat treatments averaged 1.19 GPa, 1.22 GPa, 8.7%; 1.03 GPa, 1.08 GPa, 16.7%; 1.04 GPa, 1.09 GPa, 16.1%, respectively. The HIP yield strength and elongation of 1.03 GPa and 16.7% are comparable to the best commercial, wrought Ti-6Al-4V products. The corresponding HIP component microstructures consisted of elongated small grains (~125 microns diameter) containing fine, alpha/beta lamellae.
RESUMO
Nasal reconstruction can be a difficult task to perform. It is a challenge when the defect to be reconstructed is extensive and involves the entire thickness of the nose. The difficulty is further increased when a recurrent tumor is removed, where other flaps were previously used to reconstruct the initial defect. A therapeutic option is microsurgical reconstruction; however, sometimes this cannot be performed. Furthermore, free flaps such as the anterolateral thigh or the antebrachialis radial tend to be very thick for the integuments of the face. Therefore, it is important to think of another reconstructive option to solve this problem. We present a case of nasal reconstruction with a prelaminated temporoparietal osteofascial flap, after full-thickness excision for recurrent carcinoma.
