Marcelo Alexandre Tirelli
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Marcelo Alexandre Tirelli has a total of 31 co-authors. Here are the top co-authors by number of shared publications:
- Cristina Bormio-Nunes
Universidade de São Paulo
6 shared publications Laura Plazas Tovar
3 shared publicationsRicardo de Freitas Fernandes Pontes
3 shared publications- Carlos Angelo Nunes
Department of Materials Engineering, Lorena School of Engineering, University of São Paulo, Lorena, Brazil
2 shared publications Daniel Gobato Röhm
2 shared publicationsH. Sassik
2 shared publications
Latest Publications
- 18 October 2024
- Published by Elsevier
- p. 149-234
Auxiliary systems, maintenance, and hazards
- 18 October 2024
- Published by Elsevier
- p. 89-148
Chilled water systems
- 22 August 2020
- Published by South American Development Society Journal in South American Development Society Journal
- Vol. 6 (17) , 156
GERENCIAMENTO DE RISCOS OCUPACIONAIS: UMA NOVA PROPOSTA DE SEGURANÇA DO TRABALHO
O correto gerenciamento da Segurança e Saúde no Trabalho (SST) reduz riscos de acidentes, promove a saúde e a satisfação dos trabalhadores, além de melhorar os resultados operacionais e a imagem das empresas. As alterações nas Normas regulamentadoras vieram para intensificar a melhoria das condições de segurança, exigindo dos empregadores a implantação do Gerenciamento de Riscos Ocupacionais (GRO). Baseado na Norma Regulamentadora NR-22, o Programa de Gerenciamento de Riscos (PGR) contido agora na NR-1 foi definido como artifício utilizado pelas empresas que ainda não possuam um Sistema de Gestão em Segurança e Saúde Ocupacional (SGSSO) ou uma certificação ISO 45.001. A nova NR-9 trará novas diretrizes quando a identificação e avaliação de riscos que servirá de eixo guia para o PGR rumo ao GRO. Este trabalho apresentou uma visão prática e objetiva do GRO e PGR frente às mudanças da atualidade, evidenciando a conexão entre as NR 1, 9 e 22. Além disso, o artigo teve o intuito de mostrar a abrangência do GRO, propondo um novo modelo de segurança do trabalho. Este trabalho apresentou uma análise dos três pilares do GRO, a NR-1, ISO 45.001 o Sistema de Gestão de Segurança e Saúde Ocupacional, com o intuito de mostrar uma sinergia entre esses três eles. Sendo assim, o PGR é a “ponte necessária” para se chegar ao GRO.
- 22 August 2020
- Published by South American Development Society Journal in South American Development Society Journal
- Vol. 6 (17) , 156
GERENCIAMENTO DE RISCOS OCUPACIONAIS: UMA NOVA PROPOSTA DE SEGURANÇA DO TRABALHO
O correto gerenciamento da Segurança e Saúde no Trabalho (SST) reduz riscos de acidentes, promove a saúde e a satisfação dos trabalhadores, além de melhorar os resultados operacionais e a imagem das empresas. As alterações nas Normas regulamentadoras vieram para intensificar a melhoria das condições de segurança, exigindo dos empregadores a implantação do Gerenciamento de Riscos Ocupacionais (GRO). Baseado na Norma Regulamentadora NR-22, o Programa de Gerenciamento de Riscos (PGR) contido agora na NR-1 foi definido como artifício utilizado pelas empresas que ainda não possuam um Sistema de Gestão em Segurança e Saúde Ocupacional (SGSSO) ou uma certificação ISO 45.001. A nova NR-9 trará novas diretrizes quando a identificação e avaliação de riscos que servirá de eixo guia para o PGR rumo ao GRO. Este trabalho apresentou uma visão prática e objetiva do GRO e PGR frente às mudanças da atualidade, evidenciando a conexão entre as NR 1, 9 e 22. Além disso, o artigo teve o intuito de mostrar a abrangência do GRO, propondo um novo modelo de segurança do trabalho. Este trabalho apresentou uma análise dos três pilares do GRO, a NR-1, ISO 45.001 o Sistema de Gestão de Segurança e Saúde Ocupacional, com o intuito de mostrar uma sinergia entre esses três eles. Sendo assim, o PGR é a “ponte necessária” para se chegar ao GRO.
- 1 October 2017
- Published by Editora Edgard Blucher, Ltda.
INOCULAÇÃO DE LATÃO A PARTIR DA ADIÇÃO DE FÓSFORO E ZIRCÔNIO
O ABM Proceedings é o repositório de anais dos eventos organizados pela ABM Brasil. Associe-se!
- 1 October 2017
- Published by Editora Edgard Blucher, Ltda.
INOCULAÇÃO DE LATÃO A PARTIR DA ADIÇÃO DE FÓSFORO E ZIRCÔNIO
O ABM Proceedings é o repositório de anais dos eventos organizados pela ABM Brasil. Associe-se!
- 4 October 2011
- Published by SAE International in SAE International Journal of Advances and Current Practices in Mobility
- Vol. 1
Evaluation of Aluminum Wheels with Focus on Specification Materials and Manufacturing
The growing need to avoid failures in vehicle components have become the methods of quality control of manufacturing processes more efficient and accurate, especially in safety components like automotive wheels.The aim of this work is examines the efficiency of aluminum-silicon specifications related to wheel quality for avoiding the poor results obtained in impact and fatigue tests as result of improper settings in the chemical composition and manufacture process. It is evaluated mainly the content of magnesium in aluminum alloys and certified the correct degree of silicon modification in the microstructure on the performance of these wheels. The test results indicate that even with the chemical composition parameters specified by the standard, the technical validation of the product may not be adequate.
- 4 October 2011
- Published by SAE International in SAE International Journal of Advances and Current Practices in Mobility
- Vol. 1
Evaluation of Aluminum Wheels with Focus on Specification Materials and Manufacturing
The growing need to avoid failures in vehicle components have become the methods of quality control of manufacturing processes more efficient and accurate, especially in safety components like automotive wheels.The aim of this work is examines the efficiency of aluminum-silicon specifications related to wheel quality for avoiding the poor results obtained in impact and fatigue tests as result of improper settings in the chemical composition and manufacture process. It is evaluated mainly the content of magnesium in aluminum alloys and certified the correct degree of silicon modification in the microstructure on the performance of these wheels. The test results indicate that even with the chemical composition parameters specified by the standard, the technical validation of the product may not be adequate.
- 15 August 2005
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 98 (4) , 043907
Diffusion studies and critical current in superconducting Nb–Ti–Ta artificial pinning center wire
The diffusion between Nb–20%Ta (wt %) and pure Ti is studied at temperatures of 973, 1023, and , for duration times among 25 and in an artificial pinning center (APC) wire composed of a Ti core surrounded by a Nb–20%Ta layer. The produced diffusion layer is a ternary alloy with superconducting properties, such as critical field and critical current density , which intrinsically depend on the layer composition. Measurements of layer morphology and composition were performed, and the results show a preferential diffusion of Nb and Ta into Ti. There is a slight diffusion of Ti into Nb through grain boundaries. The presence of Ta also slows down the diffusion of Nb in Ti if compared to the couple formed by pure Nb and Ti. Regarding the mechanical properties of the composite wire, the use of lower temperatures to form the ternary phase is desirable in order to avoid a larger portion of the diffusion layer rich in Ti that favorites precipitations that are detrimental to the wire ductility. The best value was obtained for the sample heat treated at . The improvement of the flux-line pinning was associated with a sharp change of the diffusion layer composition rather than pinning by normal layer interfaces, suggesting a new source of pinning in this kind of material. Nb–Ti–Ta ternary alloys have the potential to be used in superconducting magnets when fields above are required.- 15 August 2005
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 98 (4) , 043907
Diffusion studies and critical current in superconducting Nb–Ti–Ta artificial pinning center wire
The diffusion between Nb–20%Ta (wt %) and pure Ti is studied at temperatures of 973, 1023, and , for duration times among 25 and in an artificial pinning center (APC) wire composed of a Ti core surrounded by a Nb–20%Ta layer. The produced diffusion layer is a ternary alloy with superconducting properties, such as critical field and critical current density , which intrinsically depend on the layer composition. Measurements of layer morphology and composition were performed, and the results show a preferential diffusion of Nb and Ta into Ti. There is a slight diffusion of Ti into Nb through grain boundaries. The presence of Ta also slows down the diffusion of Nb in Ti if compared to the couple formed by pure Nb and Ti. Regarding the mechanical properties of the composite wire, the use of lower temperatures to form the ternary phase is desirable in order to avoid a larger portion of the diffusion layer rich in Ti that favorites precipitations that are detrimental to the wire ductility. The best value was obtained for the sample heat treated at . The improvement of the flux-line pinning was associated with a sharp change of the diffusion layer composition rather than pinning by normal layer interfaces, suggesting a new source of pinning in this kind of material. Nb–Ti–Ta ternary alloys have the potential to be used in superconducting magnets when fields above are required.- 1 April 2005
- Published by Elsevier in Journal of Magnetism and Magnetic Materials
- Vol. 290-291, 820-822
Magnetostriction and structural characterization of Fe–Ga–X (X=Co, Ni, Al) mold-cast bulk
- 1 April 2005
- Published by Elsevier in Journal of Magnetism and Magnetic Materials
- Vol. 290-291, 820-822
Magnetostriction and structural characterization of Fe–Ga–X (X=Co, Ni, Al) mold-cast bulk