PBF-LB/M of Low-Alloyed Steels: Bainite-like Microstructures despite High Cooling Rates.

Laser-based powder bed fusion of metals (PBF-LB/M) is an emerging technology with enormous potential for the fabrication of highly complex products due to the layer-wise fabrication process. Low-alloyed steels have recently gained interest due to their wide potential range of applications. However, the correlation between the processing strategy and the material properties remains mostly unclear.

[Histological findings following cartilage transposition in experimental animal septoplasties (author's transl)].

The histological findings following transplantation of crushed septal cartilage into the nasal septums of seven rabbits during septoplasties are reported. Living and devitalized chondrocytes were found together with loss of cartilage substance, its replacement by granulation tissue, and new cartilage and to a lesser extent new bone formation.

[Deviations of septum cartilage after unilateral separation of Mucoperichondrium in rabbits (author's transl)].

In 49 rabbits the mucoperichondrium of their nasal septa was strictly unilaterally separated according to the Cottle procedure. In addition, in some rabbits only the surface of the septal cartilage was incised and in others the cartilage was cut vertically or horizontally. Four months after the operation the following alterations of the septa were seen: The separation of the mucoperichondrium from the cartilage or superficial incision of the cartilage led to a deviation to the operated left side.