| Autor: |
Zhang, Tao, Qin, Zhenyang, Gong, Hai, Wu, Yunxin |
| Zdroj: |
Archives of Civil & Mechanical Engineering (Elsevier Science); Nov2024, Vol. 24 Issue 4, p1-11, 11p |
| Abstrakt: |
Wire arc additive manufactured Al–Cu alloy shows inferior mechanical properties to its wrought component due to the coarse grains and porosity. Thermo-mechanical heat treatment (T8) with rolling deformation between the solution and aging treatment was adopted to refine the grains and increase the strengths. The effect of rolling strain on the hardness, microstructure, and tensile properties of the as-deposited and inter-layer cold-rolled samples was investigated. The rolling strain shows equal increments of hardness and yield strength for both the as-deposited and cold-rolled samples before aging treatment. However, the grain refinement and strengths enhancement both increase with the increased rolling strain for the as-deposited samples after aging treatment. The average grain size and particle size of cold-rolled sample first decrease and then increase with the increased rolling strain; while they both decrease monotonously for as-deposited sample. Therefore, increased rolling strain contributes to strengths enhancement for as-deposited sample after aging treatment, while there is an optimized value for the cold-rolled sample. The density of θ′ phase increases monotonously with the increased rolling strain of as-deposited sample, thus enhancing the strengths. Further increased rolling strain induces coarsening behavior of the θ′ phase, which in turn decreases the strengths. The strengthening mechanisms of T8 treatment were discussed, involving strain-induced strengthening and precipitation strengthening. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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