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<p>This study deals with the influence of build orientation and heat treatment on the strength and ductility of the Ti-6Al-4V alloy processed by the laser-powder bed fusion (L-PBF), under compressive loading. The specimens for compression tests were prepared from three different blocks, fabricated at 0°, 45°, and 90° build orientations, in the as-built as well as heat-treated (800&#xa0;°C-1.5&#xa0;h-furnace cooled) condition. Compression tests were performed at room temperature for both the conditions. The compressive yield strength was found to be highest in the 0° build orientation, followed by that in 90° and 45° orientations in the as-built condition, however, there was decrease in the values in all the three orientations, following the heat treatment at 800&#xa0;°C. The trend of variation in the values of the ultimate compressive strength of the as-built specimens was similar to that of the yield strength, however, in the heat-treated condition the ultimate compressive strength was highest in the 90° build orientation, followed by 45° and 0° orientations. The strain to fracture increased with build orientation from 0° to 90°, both in the as-built as well as heat-treated condition. The effect of build orientation on fracture behaviour was found to be more prominent in the heat-treated condition than that in the as-built condition. </p>

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Effect of Build Orientation and Heat Treatment on Strength and Ductility of Laser-Powder Bed Fusion Processed Ti-6Al-4V under Compressive Loading

  • 期刊论文

  • 发表日期：

    2025年7月17日

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  • Pankaj Kumar Singh,
  • Santosh Kumar,
  • Vakil Singh,
  • Pramod Kumar Jain

摘要

This study deals with the influence of build orientation and heat treatment on the strength and ductility of the Ti-6Al-4V alloy processed by the laser-powder bed fusion (L-PBF), under compressive loading. The specimens for compression tests were prepared from three different blocks, fabricated at 0°, 45°, and 90° build orientations, in the as-built as well as heat-treated (800 °C-1.5 h-furnace cooled) condition. Compression tests were performed at room temperature for both the conditions. The compressive yield strength was found to be highest in the 0° build orientation, followed by that in 90° and 45° orientations in the as-built condition, however, there was decrease in the values in all the three orientations, following the heat treatment at 800 °C. The trend of variation in the values of the ultimate compressive strength of the as-built specimens was similar to that of the yield strength, however, in the heat-treated condition the ultimate compressive strength was highest in the 90° build orientation, followed by 45° and 0° orientations. The strain to fracture increased with build orientation from 0° to 90°, both in the as-built as well as heat-treated condition. The effect of build orientation on fracture behaviour was found to be more prominent in the heat-treated condition than that in the as-built condition.