|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Ultrafine-grained and Heterostructured Materials (UFGH XII)
||Mechanical properties and microstructural evolution of Cu-Al alloys with gradient structure
||Xingfu Li, Xinkun Zhu
|On-Site Speaker (Planned)
Cu-Al alloys with different stacking fault energies (SFE) of 28, 12 and 6 mJ/m2 were prepared by surface mechanical attrition treatment (SMAT) for different processing time. The tensile test showed that the SFE of 6 mJ/m2 specimen exhibited mechanical properties. Microstructure observations showed that deformation twins generated in the gradient layer owing to the decrease of SFE. The loading-unloading reloading (LUR) tests further demonstrated that the Cu–6.9 wt %Al specimen exhibited higher HDI effect. Moreover, in-situ electron backscatter diffraction (EBSD) revealed that the GNDs formed at the grain boundaries with gradient grain size. Then, the formation of GNDs gradually margined into the coarse grain region, induced back stress strengthen.
||Mechanical Properties, Characterization, Nanotechnology