W7Ni3Fe-Ti6Al4V bimetallic layered structures via directed energy deposition
W7Ni3Fe-Ti6Al4V bimetallic layered structures via directed energy deposition
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DOI：
10.1080/17452759.2022.2137048
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发表时间：
2022-11
影响因子：
10.6
通讯作者：
Yanning Zhang;Cory Groden;E. Nyberg;A. Bandyopadhyay
中科院分区：
文献类型：
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作者：
Yanning Zhang;Cory Groden;E. Nyberg;A. Bandyopadhyay
采用定向能沉积（DED）增材制造（AM）技术制备了Ti6Al4V-W7Ni3Fe双金属结构。我们的研究证明了基于d的AM能够控制Ti6Al4V-W7Ni3Fe双金属结构，并具有可定制的机械和热性能。在300℃时，双金属结构的导热系数是Ti6Al4V的3倍。单轴压缩沿横向的破坏应变为纯Ti6Al4V的63%，而纵向的破坏应变仅为纯Ti6Al4V的37%。由于元素的扩散和金属间相的形成，在整个样品中观察到不同的硬度。扫描电镜显示，打印样品的界面无元素梯度裂纹。
ABSTRACT Bimetallic structures of Ti6Al4V-W7Ni3Fe were fabricated via directed energy deposition (DED)-based additive manufacturing (AM). Our research demonstrates the ability of DED-based AM to control Ti6Al4V-W7Ni3Fe bimetallic structures with tailorable mechanical and thermal performance. The thermal conductivity of the bimetallic structures was three times higher than Ti6Al4V at 300°C. Uniaxial compression along the transverse direction showed a failure strain of 63% compared to pure Ti6Al4V, while the longitudinal direction showed a failure strain of only 37% of Ti6Al4V. Variable hardness was observed throughout the sample due to diffusion of elements and intermetallic phase formations. Scanning electron microscopy revealed that the interfaces in the as-printed samples were crack-free with elemental gradients.