Microstructure and microhardness study of laser bent Al-2024-T3
Microstructure and microhardness study of laser bent Al-2024-T3
复制标题
激光弯曲Al-2024-T3的显微组织和显微硬度研究
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
K. Watkins
中科院分区：
文献类型：
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作者：
J. Ramos;J. Magee;K. Watkins
Microstructure and microhardness profile of laser bent AA 2024-T3 sheets were obtained to determine the effects of such a process on this material. A fast-axial flow CO2 laser unit (TEM00) was used at 250, 500, and 800 W continuous wave to bend the samples; scanning velocities ranged from 10 to 80 mm/s while laser spot diameters used were 1, 5, and 10 mm. Characterization techniques included light microscopy, scanning electron microscopy, and Vickers microhardness. Laser bending process variables were arranged into a parameter called accumulated energy density (AED) in J/mm2. Light microscopy observations and microhardness results revealed that there was no damage to the microstructure for AED values less than 25 J/mm2. At these AED values, the microhardness level across the depth is closer to the average value of the as-received material (150.9+/−2.7 Hv). However, some AED values resulted in samples with microhardness above and below that number. Higher microhardness levels were attributed to a small gra...
