Microstructural regulation, work hardening and fracture behavior of Tip reinforced Mg‐xGd‐2Y‐3Zn (x=5, 7, 9 wt%) composites
Source abstract
Abstract
In this work, Ti p/Mg‐xGd‐2Y‐3Zn (x=5, 7, 9 wt%, Ti p/GWZx23) composites were fabricated using semi-solid stirring casting and hot extrusion. The Ti p/Mg laminar-like configuration was regulated by Gd content. The effect of Ti p/Mg laminar-like configuration on the microstructure, mechanical properties, work hardening and fracture behavior of Ti p/GWZx23 composites was thoroughly studied. The results revealed that the Ti p elongated along the extrusion direction (ED) after extrusion and formed Ti p/Mg laminar-like configuration with the Mg matrix. With the increase of Gd content, the hardness of the matrix increased, which was beneficial to the elongation of Ti p. The elongation of Ti p reduced its hardness value, released the stress and promoted the DRXed grain refinement. The refined grain enhanced the ability of grain boundaries to absorb dislocations and improved the recovery effect. Furthermore, the formation of Ti p/Mg laminar-like configuration induced back stress strengthening at the Ti p/Mg interface, enhancing the work hardening rate of the Ti p/GWZx23 composites. The Ti p/Mg laminar-like configuration changed the strain distribution and the strain was transferred from the Ti p sharp corner to the elongated Ti p, which was effectively alleviates stress concentration at the Ti p/Mg interface and inhibited crack propagation.
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Research context
OpenAlex topics: Aluminum Alloys Composites Properties · Aluminum Alloy Microstructure Properties · Advanced Welding Techniques Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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