Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1570780 | Materials Characterization | 2016 | 8 Pages |
Abstract
In this study, the local microstructure, strength and toughness of different zones in AA6061-T6 stationary shoulder friction stir welds were investigated. Results indicated that, the most significant weakening for both strength and toughness is found in HAZ that close to NZ. The microstructure of NZ includes recrystallized fine grains with high density of dislocations, homogeneous constituent particles distribution and re-precipitated of G.P. zones resulting in the recovery of local strength and the improvement for both plasticity and toughness. In HAZ, the grain structure and constituent particle distribution inherit the characteristics of base metal, but βⳠprecipitates are dissolved and the reprecipitated βⲠparticles are coarsened. This results in the decrease of yield strength, tensile strength, crack initial energy and propagation energy of HAZ, especially near NZ.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Zhuanping Sun, Xinqi Yang, Dongxiao Li, Lei Cui,