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Article: Prestrain and Aging Treatment to Improve the Mechanical Properties of AA6022 Aluminum Alloy Laser Weldment

Article from:
Metallurgical and Materials Transactions
Article date:
November 1, 2009
Author:
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This study aimed to improve the mechanical properties of aluminum alloy sheet laser weldments. Different tensile prestrains, which simulate sheet forming, were applied to a base metal and its Nd:YAG laser weldment, respectively; then, some samples were subjected to a paint-bake-cycling (PBC) process and some samples were subjected to an artificial aging treatment of 175 °C/1000 min. The tensile test and Vickers hardness test, followed by transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS), and electron-probe microanalysis (EPMA), were applied to examine the microstructures and compositions. The results showed that tensile prestrain and heat-treatment conditions ...

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