| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5454529 | Materials Characterization | 2017 | 12 Pages |
Abstract
The new observations have been compared to data in the literature with the aim of providing an in-depth understanding of the detrimental effects of interfacial reaction in aluminum - magnesium dissimilar welding. Three Al-Mg binary IMC phases were identified, γ-Al12Mg17 and β-Al3Mg2, as well as ε-Al30Mg23. Indentation techniques showed that all the IMC phases had extremely low toughness (< 0.1 MPam1/2). FIB-assisted ring core milling revealed that both the β-Al3Mg2 and γ-Al12Mg17 phases contained large residual stresses. Greater tensile residual stress was measured in the β-Al3Mg2 phase, which, combined with a lower toughness and more rapid growth kinetics, explains why it is generally the 'weak link' in Al-Mg dissimilar joints.105
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Authors
Yin Wang, Philip B. Prangnell,