TY - JOUR
T1 - Microstructure modifications induced by a laser surface treatment in an AA7449 aluminium alloy
AU - Fribourg, G.
AU - Deschamps, A.
AU - Bréchet, Y.
AU - Mylonas, G.
AU - Labeas, G.
AU - Heckenberger, U.
AU - Perez, M.
PY - 2011/3/15
Y1 - 2011/3/15
N2 - This work investigates the modification of the precipitate microstructure induced by laser surface treatments in an AA7449 aluminium alloy in T7651 temper. Microhardness maps in the cross-section below the laser lines, as well as maps of the precipitate size and volume fraction obtained by Small-Angle X-ray Scattering, show that a significant precipitate dissolution and coarsening has been induced by the laser treatment. Integrated modelling is carried out to quantify this effect, including a thermal finite element model, a size class precipitation model and a precipitation hardening model. The precipitation model is calibrated using separate reversion experiments, and then coupled to the thermal and mechanical models, allowing a quantitative description of the modification of the microstructure.
AB - This work investigates the modification of the precipitate microstructure induced by laser surface treatments in an AA7449 aluminium alloy in T7651 temper. Microhardness maps in the cross-section below the laser lines, as well as maps of the precipitate size and volume fraction obtained by Small-Angle X-ray Scattering, show that a significant precipitate dissolution and coarsening has been induced by the laser treatment. Integrated modelling is carried out to quantify this effect, including a thermal finite element model, a size class precipitation model and a precipitation hardening model. The precipitation model is calibrated using separate reversion experiments, and then coupled to the thermal and mechanical models, allowing a quantitative description of the modification of the microstructure.
KW - Al-Zn-Mg-Cu
KW - Laser surface treatment
KW - Modelling
KW - Precipitation
UR - http://www.scopus.com/inward/record.url?scp=79151485900&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2010.12.018
DO - 10.1016/j.msea.2010.12.018
M3 - Article
AN - SCOPUS:79151485900
VL - 528
SP - 2736
EP - 2747
JO - Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
IS - 6
ER -