Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11027751 | Additive Manufacturing | 2018 | 19 Pages |
Abstract
Mechanical properties (tensile strength and creep) of AlSi10Mg specimens fabricated by selective laser melting (SLM) in the Z-direction were investigated in the 25-400â°C temperature range. Specimens were tested after stress relief treatment. The results revealed that yield stress (YS) significantly decreases and the elongation increases at temperatures higher than 200â°C. The ultimate tensile stress (UTS) continuously decreases with temperature. The creep parameters, namely stress exponent n and apparent activation energy Q, were found to be 25â±â2 and 146â±â20âkJ/mole, respectively. It was shown that plastic deformation during creep is governed by dislocation movements in primary aluminum grains. The tested material is actually an aluminum composite reinforced by sub-micron Si particles. The creep resistance of AlSi10Mg alloy fabricated by selective laser melting is close to that for aluminum matrix particles reinforced composites.
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Industrial and Manufacturing Engineering
Authors
Naor Elad Uzan, Roni Shneck, Ori Yeheskel, Nachum Frage,