Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1646299 | Materials Letters | 2012 | 4 Pages |
Significant neutron peak broadening was observed in situ underneath the tool of friction stir processing (FSP) in 6061-T6 aluminum alloy. Such broadening was correlated to the dislocation density and subgrain size by using peak profile analysis methods. The high dislocation density of about 1.3×1015 m−2 underneath the FSP tool sharply decreases to 1.0×1014 m−2 outside the tool. The quantitative determination is consistent with the high-resolution x-ray and TEM results.
► In situ neutron diffraction method was applied to determine the transient grain structure. ► The dislocation density and subgrain size were quantified using peak profile analysis. ► The dislocation density of 1.3×1015 m−2 was measured underneath the tool under processing. ► The results are consistent with the high-resolution x-ray and TEM observations.