Abstract
The new magnetostrictive material Fe-Ga alloy has drawn considerable attention due to its excellent performance. The microstructure of the Fe-Ga alloy, which varies with the state of preparation or processing, not only affects the magnetostriction but also the mechanical service stability, i.e., the stress corrosion cracking (SCC) property. In this paper, we report a comparison of the SCC behaviors for two states of Fe85Ga15 alloys by using constant load experiments and the electrochemical method. Results showed that the hot-rolled Fe85Ga15 alloy exhibited better mechanical properties compared to the as-cast Fe85Ga15 alloy. SCC was found in both Fe85Ga15 alloys in a 3.5 wt % NaCl solution, and the as-cast alloy was more sensitive to SCC. The normalized thresholds of SCC for the as-cast and hot-rolled Fe85Ga15 alloys are 0.34 and 0.81, respectively. Furthermore, results also indicated that the SCC mechanism is an anodic dissolution for the Fe85Ga15 alloy.
Highlights
Magnetostrictive Fe-Ga alloys with excellent comprehensive properties have been given more attention recently
The presence of the lattice distortion and microstructure mentioned above will have a significant impact on the corrosion and stress corrosion cracking (SCC) of alloys in comparison with α-Fe, even if the percentage is small in the solid solution
Our previous work [24] reported the effect of a magnetic field on the SCC of the Fe83 Ga17 alloy, and the results showed that SCC was enhanced when a tensile magnetic field was applied, and inhibited when an in-plane or perpendicular magnetic field was applied
Summary
Magnetostrictive Fe-Ga alloys with excellent comprehensive properties have been given more attention recently. The presence of the lattice distortion and microstructure mentioned above will have a significant impact on the corrosion and SCC of alloys in comparison with α-Fe, even if the percentage is small in the solid solution. The Fe-Ga alloy is a new type of magnetostrictive material after the TbDyFe and NiMnGa alloys It offers a higher potential application value due to its more excellent mechanical properties [8,9,10], and easier fabrication procedures compared to the former magnetostrictive materials [10,11]. The investigation of the performance in possible service environments is essential to the application of Fe-Ga alloys
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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.
