Friction welding or electron/laser beam welding of nickel superalloys compromises the microstructure with localized melting and heat-affected zones (HAZ). In this work, Field-Assisted Sintering Technology (FAST) is studied as an alternative method for solid-state diffusion bonding of superalloys CM247LC and Inconel 718. Bonding microstructures and room-temperature tensile strengths are evaluated. Preliminary results suggest that FAST bonding leads to an interface with a compositional gradient without producing a HAZ and without losing tensile strength.

中文翻译：

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通过现场辅助烧结技术将异种镍基高温合金进行固态结合以用于涡轮机应用

镍超合金的摩擦焊接或电子/激光束焊接会损害局部熔化和热影响区（HAZ）的显微组织。在这项工作中，研究了场辅助烧结技术（FAST）作为超级合金CM247LC和Inconel 718的固态扩散粘结的替代方法。对粘结微结构和室温拉伸强度进行了评估。初步结果表明，FAST粘结可形成具有成分梯度的界面，而不会产生HAZ，并且不会损失拉伸强度。