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Mechanical Studies of the Novel Nickel-Free Stainless Steel as Alternative To the Conventional Stainless Steels
Authors: Moreno João Roberto Sartori; Slewinski Anderson
Number of views: 529
Abstract: This study aimed to analyze the mechanical behavior of an austenitic alloy high strength and free of Nickel taken as
an alternative to replace the alloys commonly used in Ni-Ti and Cr-Ni for performance in prosthesis, instrumentation and
devices both in the medical field as dental. The higher nitrogen and carbon contents in the alloy second ASTM F 2581 – 07,
with 0.19%C; 0.42%Si; 10.38%Mn; 17.10%Cr; 3.05%Mo; 0,48%N and 0,02máx Ni, ensure a high purity, a combination of
high strength and toughness and, simultaneously, a stable, completely austenitic, microstructure without ferrite and grain
boundary precipitates. Tensile strength tests, toughness and hardness showed an important provision of care for
biotechnologically application in the human body, for patients allergic to nickel. The biocompatibility, proved in testing, in
combination with the very good corrosion resistance, provides the optimum condition and necessary safety for use in or in
contact with the human body. An excellent polishability is ensured by the homogenous microstructure and the high purity of
the material. A high potential for work-hardening, enabling strength of 1895MPa/micro hardness of 400HV showed
particularly in tensile strength (1.8 times greater than alloys Ni-Ti and 2.9 times greater than alloys Cr-Ni), allows the use in
high strength applications.