| About this Abstract |
| Meeting |
Materials Science & Technology 2019
|
| Symposium
|
Corrosion of Additively Manufactured Metals
|
| Presentation Title |
Corrosion Performance of Aluminium Based Functionally Graded Materials Processed by Wire-arc Additive Manufacturing |
| Author(s) |
Amin S. Azar, Martin F. Sunding, Nicky Tzima, Spyros Diplas, Angeliki Lekatou, Spyros Kleftakis |
| On-Site Speaker (Planned) |
Amin S. Azar |
| Abstract Scope |
Wire-arc additive manufacturing of metallic materials provide the opportunity of processing functionally graded materials (FGMs). However, abrupt changes in the composition of the materials may have consequences on the corrosion performance of the final structure. In addition to the compositional variations, the microstructure also varies along the build direction since each deposited layer creates heat affected zone on the material underneath. This can result in precipitation of secondary phases or local coarsening of the microstructure that will also influence the corrosion properties of the material. In this study, Al-5Mg material was laid over an AA-6061 substrate in the form of a block. The block was electrochemically tested through the cross-section (along two different directions) by cyclic polarization in 3.5 wt.% NaCl. The objective was to identify any different electrochemical behavior between the various deposited layers. XPS was also carried out to show the spatial distribution and chemical state of the corrosion products. |