Abstract
In this work, the molecular dynamics (MD) simulation was applied to design a laminated composite structure comprised of the shape memory alloy (SMA) and Cu‐Zr metallic glasses (MGs). A wide range of MG compositions was considered to tune the mechanical features and improve the homogenous plastic deformation during the tension loading. The results indicated that the martensitic transformation in the SMA inhibited the sudden shear band propagation in the composite for all the samples. Moreover, it was revealed that the mechanism of plasticity was significantly affected by the change of MG composition. In the Cu‐rich MGs, the formation and propagation of thick shear bands occurred at the end of the tension loading; however, the increase in Zr content induced the interaction of multiple shear bands with finer configurations in the system. Nevertheless, the excessive Zr addition in the MG composition facilitated the aggregation of nanopores at the interface of SMA and MGs, which may be due to the softening effect in the Zr‐rich MGs. Finally, it is concluded that an optimized MG composition is required for the trade‐off between the plasticity and the strength in the SMA‐MG composites.
Highlights
Supat Chupradit,1 Indah Raya,2 Dinh Tran Ngoc Huy,3,4 Dmitry Bokov,5 Pham Van Tuan,6 Aravindhan Surendar,7 Doaa Alaa Lafta,8,9 Mustafa M
Cheng et al [20] proposed a novel coreshell structure-reinforced Zr-based metallic glass composites (MGCs) with the good tensile ductility and high strength. ey found that the simultaneous formation of α-Zr core and β-Zr shell in the glassy structure was the main reason for improving the mechanical properties
Using the selective laser melting process, the ZrCu MGCs reinforced with B2 austenite phase was fabricated, and it was found that the martensitic transformation from the B2 to B19 phase significantly enhances the ductility in the material [23]
Summary
Supat Chupradit ,1 Indah Raya, Dinh Tran Ngoc Huy, Dmitry Bokov ,5 Pham Van Tuan, Aravindhan Surendar ,7 Doaa Alaa Lafta, Mustafa M. A wide range of MG compositions was considered to tune the mechanical features and improve the homogenous plastic deformation during the tension loading. E results indicated that the martensitic transformation in the SMA inhibited the sudden shear band propagation in the composite for all the samples. It was revealed that the mechanism of plasticity was significantly affected by the change of MG composition. In the Curich MGs, the formation and propagation of thick shear bands occurred at the end of the tension loading; the increase in Zr content induced the interaction of multiple shear bands with finer configurations in the system. It is concluded that an optimized MG composition is required for the trade-off between the plasticity and the strength in the SMA-MG composites
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