Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Eugenio José Zoqui"'
Publikováno v:
Fluids, Vol 9, Iss 2, p 36 (2024)
We propose a methodology for the rheological characterization of a semisolid metal slurry using experimental squeeze-flow data. The slurry is modeled as a structural thixotropic viscoplastic material, obeying the regularized Herschel–Bulkley consti
Externí odkaz:
https://doaj.org/article/1978ae2d7dcc481193037992eafff47e
Publikováno v:
Materials Research, Vol 13, Iss 3, Pp 305-318 (2010)
This study involved a complete evaluation of the thixoformability of AA7004 and AA7075 alloys, from their microstructural characterization to their viscous behavior. The alloys were subjected to globularization heat treatments for 0, 30, 90 and 210 s
Externí odkaz:
https://doaj.org/article/28fc7aead2be4bbd99b3aef62ad15fc3
Publikováno v:
Solid State Phenomena. 327:244-249
Identification of critical temperatures is paramount for semisolid processing. Application of the principles of differential calculus to identify these temperatures on semisolid transformation curves allows the semisolid metal (SSM) processing window
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd96d370421d5181ddd9114655a4c270
https://doi.org/10.4028/www.scientific.net/ssp.327.244
https://doi.org/10.4028/www.scientific.net/ssp.327.244
Publikováno v:
Materials Research, Vol 24, Iss 3 (2021)
Abstract This work describes the design, construction and testing of a continuous casting device coupled to an electromagnetic stirring system for the production of thixoforming feedstock using Al-Si alloys. The following processing and construction
Externí odkaz:
https://doaj.org/article/401e47e8cf9d42799f4b454e3de9fa8f
Autor:
André Victor Rodrigues Dantas, Gabriela Lujan Brollo, Daimer Velasquez Tamayo, Eugênio José Zoqui
Publikováno v:
Materials Research, Vol 24, Iss 2 (2021)
Abstract Al-Si-Zn-Mg quaternary alloys represent a potential range of feedstock's for semisolid processing (SSM) that combine the advantages of the thixoforming process with the possibility of heat treatment to improve mechanical performance. In this
Externí odkaz:
https://doaj.org/article/730da80da4dd4b5086fdb1721a336155
Autor:
Daimer Velazquez Tamayo, Gabriela Lujan Brollo, Juliana Rodrigues de Oliveira, Fabio Miani, Eugênio José Zoqui
Publikováno v:
Metals, Vol 12, Iss 5, p 734 (2022)
The effects of Si content (X = 4 to 7 wt.%), heating rate (5 to 25 °C/min) and sample mass (20 to 200 mg) on determination of the thixoforming working window by differential scanning calorimetry DSC were analyzed for the Al-Xwt.%Si-4wt.%Zn, or simpl
Externí odkaz:
https://doaj.org/article/5d5676980dc540ab9e7043c0ec454b4e
Publikováno v:
Minería y Geología, Vol 31, Iss 4, Pp 51-69 (2016)
Se diseñó y produjo una aleación de hierro fundido gris (Fe-2,6%wtC 1,5%wtSi) específica para procesamiento semisólido, la cual fue sometida a ensayos de tixoconformación a 1 160 ºC y 1 180 ºC, con tiempos de permanencia de 0, 30, 60 y 90 s,
Externí odkaz:
https://doaj.org/article/f7429bcb312a40809da8a32448fdf91c
Publikováno v:
Advances in Materials Science and Engineering, Vol 2016 (2016)
This work evaluates the morphological evolution at the semisolid state of the Al-4.0wt%Si-2.5wt%Cu alloy produced by direct chill casting under electromagnetic stirring (EMS) and by one equal channel angular pressing (ECAP) pass. The ECAP emerged as
Externí odkaz:
https://doaj.org/article/177de3d4b5d043a297745852da74a8ee
Publikováno v:
Metals, Vol 8, Iss 5, p 332 (2018)
Thixoforming depends on three factors: (a) the thermodynamic stability of the solid-to-liquid transformation in the presence of temperature fluctuations; (b) the size and morphology of the solid particles in the liquid in the semisolid state; and (c)
Externí odkaz:
https://doaj.org/article/6dafa559afdb4de2a6c022e7d8accac4
Autor:
Rosley Anholon, Jefferson Souza Pinto, Elen Nara Besteiro Carpim, Olívio Novaski, Eugênio José Zoqui, Robert Eduardo Cooper Ordonez
Publikováno v:
Brazilian Journal of Operations & Production Management, Vol 12, Iss 1 (2015)
This paper analyzes the main difficulties in managing of Micro and Small enterprises of construction sector in Jundiai city. For this, a survey was done with 51 entrepreneurs and the difficulties analyzed in nine categories. Some results stand out am
Externí odkaz:
https://doaj.org/article/bd7ba3fcc55d4909abe378a5f22ab1d2