Abstract
The X-ray diffraction (XRD), scanning electron microscope (SEM), weight loss corrosion rate, corrosion residual strength (CRS), and slow strain rate tensile (SSRT) methods were used to study the effects of the addition of rare earth Erbium (Er) on the dynamic corrosion mechanical properties of the AM50 magnesium alloy. The results show that after Er was added, a new phase of Al3Er appeared and the microstructure was refined. The corrosion resistance of rare earth Er addition to the alloy was 0.5% > 1.5% > 1.0% > 0. Furthermore, the corrosion rates decreased in 432 h. The CRS results within 168 h show that the strength after an addition of 0.5% Er was the highest and the decline rate was the smallest. According to the shape of the tensile curve of CRS and the morphology of the tensile fracture, the addition of rare earth Er did not change the fracture form of the alloy, which remained as quasi-cleavage.
Highlights
Due to their high specific strength and stiffness, magnesium alloys are increasingly used in the aerospace and automotive industries[1,2,3,4,5]
The Corrosion residual strength (CRS) results within 168 h show that the strength after an addition of 0.5% Er was the highest and the decline rate was the smallest
According to the shape of the tensile curve of CRS and the morphology of the tensile fracture, the addition of rare earth Er did not change the fracture form of the alloy, which remained as quasi-cleavage
Summary
Due to their high specific strength and stiffness, magnesium alloys are increasingly used in the aerospace and automotive industries[1,2,3,4,5]. Rare earth alloying has been proved to be an effective means to improve the corrosion and mechanical properties of magnesium alloys[13,14,15]. The strength of the material after corrosion is called Corrosion residual strength (CRS)[16, 17].The study of residual strength of corrosion is helpful to predict the service life of materials and avoid loss due to unexpected material failure. If it can establish the prediction method of CRS will promote and popularize the application of magnesium alloy[18, 19].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
