Sustainability in manufacturing processes: practices performed in metal forming, casting, heat treatment, welding and electrostatic painting

© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group. This article aims to list the main sustainable practices developed in the processes of metal forming, casting, heat treatment, welding and electrostatic painting. When analysed the literature about sustainable manufacturing, a predominance of studies about machining is observed and the processes mentioned are few explored in academic studies. The research strategy used to reach the objective was systematic literature review, conducted for each process cited. Many sustainable practices were identified with prominence of better materials use and energy efficiency. The authors of this article believe that the information presented here can be useful for researches in their future studies and for industry professionals interested in improving manufacturing processes

Electrical Conductivity of Alkali-silicate Glass containing Fe_2O_3.

Electrical resistivity (ρ) of Alkali-Silicate glasses has been measured to find out the behavior of Fe-ion in these glasses. ρ depends mainly upon the Fe^<2＋>/Fe total-ratio, and has the minimum peak. The behavior of Fe-ion at the minimum of ρ is discussed by the results of Mo^^¨ssbauer-spectra in terms of the oxygen-coordination number of Fe^<3＋>-ion. The mechanism of electrical conductance in these glasses is assumed to be the valence electron transfer between Fe^<2＋> and 6-fold oxygen Fe^<3＋>