构建方向对激光粉末床熔融制造的 Ti6Al4V(无热处理)弯曲疲劳性能和冲击韧性的影响

T. Rautio, M. Jaskari, M. Hietala, Aappo Mustakangas, M. Keskitalo, A. Järvenpää
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引用次数: 0

摘要

钛合金因其卓越的品质而在各行各业受到高度重视。本研究探讨了构建方向如何影响激光粉末床熔融 (PBF-LB) 生产的未经热处理的 Ti6Al4V 的机械性能和疲劳性能。研究结果表明,机械性能因构建方向而异,垂直方向的试样具有最高的屈服强度和拉伸强度,而通过断裂伸长率测量,垂直方向的试样在延展性方面表现出色。冲击韧性也有差异,水平方向的表现最好。然而,构建方向对弯曲疲劳性能的影响很小。对角线方向和垂直方向都显示出相似的疲劳极限,都在 40 兆帕左右。事实证明,干电解抛光是一种有效的技术,可显著提高疲劳性能,极限值稳定在 150 兆帕左右。这项研究强调了在 PBF-LB 制造过程中考虑构建方向对特定机械和冲击性能的重要性,以及干式电抛光在改善 Ti6Al4V 组件疲劳性能方面的潜力。这些发现为增材制造行业提供了宝贵的见解,有助于优化 Ti6Al4V 组件的生产。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Build Orientation Effect on Bending Fatigue Performance and Impact Toughness of Laser Powder Bed Fusion Manufactured Ti6Al4V Without Heat Treatment
Titanium alloys are highly valued in various industries due to their exceptional qualities. This study examines how the build orientation affects the mechanical and fatigue properties of Laser Powder Bed Fusion (PBF-LB) produced Ti6Al4V, without heat treatment. The research shows mechanical properties vary based on build orientation with vertically oriented specimens exhibiting the highest yield and tensile strengths, while vertical orientation excels in ductility, measured through elongation at break. Impact toughness sees variations with horizontal orientation performing the best. However, build orientation has minimal influence on flexural bending fatigue performance. Both diagonal and vertical orientations show similar fatigue limits at around 40 MPa. Dry electropolishing proves to be an effective technique, significantly enhancing fatigue performance with limits stabilizing at about 150 MPa. This study underscores the importance of considering build orientation in PBF-LB manufacturing for specific mechanical and impact properties and the potential of dry electropolishing in improving the fatigue performance of Ti6Al4V components. These findings offer valuable insights for the additive manufacturing industry, aiding in the optimization of Ti6Al4V component production.
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