Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5454968 | Materials Characterization | 2017 | 22 Pages |
Abstract
Microstructural evolution of friction stir welded 2099 AlLi alloy was evaluated. Friction stir welding (FSW) resulted in significant grain refinement, dissolution of original phases T1 (Al2CuLi) and δⲠ(Al3Li), and precipitation of ultrafine δⲠphases in the nugget zone (NZ). In the heat affected zone (HAZ), heavy precipitation of T1 phases led to a peak hardness of 105 HV. A strong rotated Cube texture {013} ã100ã was obtained in the base metal (BM). After FSW the NZ was characterized by shear texture {111} ã110ã, while Bass texture {110} ã112ã and S texture {123} ã634ã were developed in the thermo-mechanically affected zone (TMAZ). Compared with the BM, the dislocation density was decreased in the welding zones, which resulted from recovery and recrystallization.
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Materials Science
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Authors
Yi Lin, Ziqiao Zheng,