Enhanced mechanical properties of Ti6Al4V alloy fabricated by laser additive manufacturing under static magnetic field
Enhanced mechanical properties of Ti6Al4V alloy fabricated by laser additive manufacturing under static magnetic field
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DOI：
10.1080/21663831.2022.2064195
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发表时间：
2022-04
影响因子：
8.3
通讯作者：
R. Zhao;Chaoyue Chen;S. Shuai;T. Hu;Y. Fautrelle;H. Liao;Jian Lu;Jiang Wang;Z. Ren
中科院分区：
文献类型：
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作者：
R. Zhao;Chaoyue Chen;S. Shuai;T. Hu;Y. Fautrelle;H. Liao;Jian Lu;Jiang Wang;Z. Ren
本研究介绍了一种新的磁场调节方法在金属增材制造，以实现细化晶粒组织和提高机械性能，而无需后处理和成分变化。作为展示材料，在静磁场（SMF）下采用直接能量沉积法制备了Ti6 Al 4V合金。结果表明，0.55T的横向磁场能有效地调节由强取向到弱取向的β晶粒扭曲和α晶界不连续的组织。拉伸试验表明，拉伸伸长率（ε f）在纵向和横向上都有显着提高，而强度略有下降。开发了一种磁场辅助激光增材制造方法来调节Ti-6Al-4V合金的微观结构。由此产生的细化的β晶粒和不连续的α晶界（GB）显著提高了ε f。
This study introduced a novel magnetic-field regulation method in metallic additive manufacturing to achieve the refined grain structure and enhanced mechanical properties without post-treatment and composition changes. As a showcase material, the Ti6Al4V alloy was fabricated using direct energy deposition under the static magnetic field (SMF). It is found that the transverse SMF of 0.55 T can effectively regulate the microstructure with twisted prior-β grains (strong orientation to weak orientation) and discontinuous α grain boundaries. The tensile test shows a significant improvement of tensile elongation (ε f ) in both longitudinal and transverse directions with a slight strength decrease. GRAPHICAL ABSTRACT IMPACT STATEMENT A magnetic field assisting laser additive manufacturing approach was developed to modulate the microstructure for Ti-6Al-4V alloy. The resulting refined β grains and discontinuous α grain boundaries (GBs) improve the ε f significantly.