If blood isn’t able to flow unobstructed to the penis, it can prevent an erection, cause an erection to be lost prematurely, or reduce its overall hardness. Phosphodiesterase type 5 (PDE5 ...

The starting microstructure of specimens was fully austenitic, with a hardness of 216 ± 7 HV. Before nitriding, samples were ultrasonically cleaned for 20 minutes in ethanol, in order to remove ...

When AISI 316L stainless steels are submitted to the nitriding process at temperatures lower than 450 °C, a high nitrogen content expanded austenite phase is formed, which shows higher hardness and ...