6 documents found, page 1 of 1
Involvement of Brazilian companies with occupational health and safety aspects ...
Campanelli,Leandro Contri; Ribeiro,Lucas Desiderio; Campanelli,Leonardo ContriAbstract Paper aims This paper aimed to analyze the level of involvement of companies in the state of São Paulo with aspects of occupational health and safety (OH&S) and with NBR ISO 45001:2018. OH&S aspects have acquired increasing prominence worldwide especially due to the unprecedented publication of ISO 45001 in 2018. Originality To the authors’ knowledge, this is the first paper published in Brazil to expl...
Influence of a Femtosecond Laser Surface Modification on the Fatigue Behavior o...
Santos,Alan dos; Campanelli,Leonardo Contri; Silva,Paulo Sergio Carvalho Pereira da; Vilar,Rui; Almeida,Maria Amélia Martins de; Kuznetsov,AlexeiThe objective of this investigation was to evaluate the influence of surface modification by femtosecond laser (with average fluence of 0.6 J/cm2 and scanning speed of 0.1 mm/s) on the fatigue resistance of Ti-6Al-4V ELI alloy. A significant reduction in the fatigue strength of the material modified by laser was observed. Residual tensile stresses generated during surface modification were negligible, presentin...
Assessment of the Fatigue Behavior of Ti-6Al-4V ELI Alloy with Surface Treated ...
Potomati,Fernanda; Campanelli,Leonardo Contri; Silva,Paulo Sergio Carvalho Pereira da; Simões,José Guilherme Alvarenga BatistaThe effect of a surface treatment by Nd:YAG laser irradiation on the fatigue behavior of Ti-6Al-4V ELI was studied. Axial fatigue tests were performed to obtain S-N curves in polished and laser treated conditions. Roughness measurements and scanning electron microscopy were used to characterize the features of the modified surface. A reduction in the fatigue strength of around 35% was obtained after the laser t...
Effect of the modification by titanium dioxide nanotubes with different structu...
Campanelli,Leonardo Contri; Silva,Paulo Sergio Carvalho Pereira da; Oliveira,Nilson Tadeu Camarinho; Bolfarini,ClaudemiroNanotechnology is seeing as having potential to raise benefits to several research and application areas. Recently materials with nanostructured surfaces of nanopores, nanotubes and nanowires have become an important investigation field, since their chemical and physical properties may be substantially different from those of the corresponding substrate. In face of the necessity of assuring that such modificati...
Parameters optimization for friction spot welding of AZ31 magnesium alloy by Ta...
Campanelli,Leonardo Contri; Suhuddin,Uceu Fuad Hasan; Santos,Jorge Fernandez dos; Alcântara,Nelson Guedes deFriction spot welding (FSpW) is a solid state welding process suitable for producing spot-like joints, especially in lightweight materials, which are particularly interesting due to the weight saving potential. The plunging of an especially designed non-consumable and rotating tool creates a connection between overlapped sheets through frictional heat and plastic deformation. Minimum material loss is observed, ...
Soldagem por ponto no estado sólido de ligas leves
Campanelli,Leonardo Contri; Alcântara,Nelson Guedes de; Santos,Jorge Fernandez dosA recente preocupação quanto às mudanças climáticas vem impulsionando pesquisas em eficiência energética dos meios de transportes no sentido de reduzir a emissão de gases. Uma das principais soluções consiste na redução do peso estrutural através da aplicação de novos materiais, como as ligas leves de alumínio e magnésio. Entretanto, novos usos ficam muitas vezes limitados pela dificuldade de união desses mater...