On the deflection behaviour of prealloyed alpha brass during sintering : in-situ bending technique and modelling

Mehrdad Mousapour, Maziyar Azadbeh*, Ahad Mohammadzadeh, Herbert Danninger

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

During Supersolidus Liquid Phase Sintering the viscosity of beams affects the deflection level, thus in sintering practice also the tendency to distortion. Although the deflection value increases with decreasing viscosity, a concentration gradient from surface to centre of samples may neutralise the effect of viscosity. In this paper, the deflection behaviour of Cu-28Zn beams, manufactured from prealloyed powder, at various temperatures and times ranging from 910 to 950°C and 0–90 min, respectively, was studied. The midpoint deflection was measured by the in situ bending images. To better understand the deflection behaviour, experimental results were mathematically modelled using general deflection equations. To obtain further information, microstructural studies were performed using optical and scanning electron microscopy. It is concluded that zinc evaporation influences the chemical composition and generates a thin solid layer around the sample resulting in a parabolic deflection behaviour with temperature and non-linear with time.

Original languageEnglish
Pages (from-to)134-141
Number of pages8
JournalPowder Metallurgy
Volume63
Issue number2
Early online date26 Feb 2020
DOIs
Publication statusPublished - 14 Mar 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • alpha brass alloy
  • and zinc evaporation
  • deflection
  • modelling
  • Prealloyed powder

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