Characterization of microstructure, mechanical properties and formability for thermomechanical treatment of friction stir welded 2024-O alloys
Characterization of microstructure, mechanical properties and formability for thermomechanical treatment of friction stir welded 2024-O alloys
复制标题
搅拌摩擦焊 2024-O 合金热机械处理的显微组织、机械性能和成型性表征
DOI：
10.1016/j.msea.2019.138303
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发表时间：
2019-09-23
期刊：
影响因子：
6.4
通讯作者：
Hu, Z. L.
中科院分区：
文献类型：
--
作者：
Pang, Q.;Zhang, J. H.;Hu, Z. L.
The microstructure, mechanical properties, and formability of friction stir welded (FSW) Al alloys after thermomechanical treatment are investigated using detailed microstructural characterization and numerical simulation. FSW joints prepared using a high heat input (rotation rate: 800 rpm; welding speed: 100 mm/min) show uniform grain-size distribution, consequently exhibiting better thermal stability during solution treatment at 450-495 degrees C. Abnormal grain growth is not observed in the joint due to an increase in the Zener pinning value. Further, the solution-treated joints exhibit exceptional formability, with a maximum bulging height similar to 1.5 times that of the as-welded joints. The tensile strength of the joints is equal to that of the base metal (424 MPa) due to the proliferation of dislocation, refinement and increase of precipitates in the weld induced by plastic deformation during the forming process.
