Process-controlled suppression of natural aging in an Al-Mg-Si alloy

作者：Pogatscher S^*; Kozeschnik E; Antrekowitsch H; Werinos M; Gerstl S S A; Loeffler J F; Uggowitzer P J

来源：Scripta Materialia, 2014, 89: 53-56.

DOI：10.1016/j.scriptamat.2014.06.025

• Aluminum alloys
• Aging
• Precipitation
• Vacancies
• Phase transformation kinetics

In this study natural aging of an Al-Mg-Si alloy was investigated using various quenching processes. Atom probe tomography and electrical resistivity measurements reveal that solute clustering during natural aging can be suppressed by interrupting quenching for 120 s at 160 degrees C. This phenomenon is elucidated by simulating the excess vacancy annihilation. Reduced frozen-in excess vacancy concentration after the interrupted quenching can explain this experimentally observed suppression of natural aging.

• 出版日期2014-10-15