Diffusion bonding methods are one of the joining methods for Plasma Facing Components in fusion reactors like ITER or in later decades the DEMO reactor. Diffusion bonding of 316 L specimens were investigated on the Gleeble 3800 thermomechanical physical simulator at University of Dunaújváros at 1000–1050 °C, with 20−30 MPa, through 40−80 min under high vacuum conditions. A new method was found that reveals the surface contact electrical resistance through diffusion bonding by numerical simulation. Physical simulation on Gleeble of diffusion bonded samples and heat effected zone tests were carried out with the same parameters, but the axial creep deformations were different in the pairs. The numerical simulations showed a significant contact electrical resistance at diffusion bonding seam which effected this different in the axial creep. In this way, through numerical simulations of a Gleeble diffusion bonding process the contact electrical resistance could be estimated in a non-destructive way, and one can estimate better the actual status of the bonded seam during the joining process. The work intended to prepare samples for further non-destructive tests as well.

中文翻译：

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在 Gleeble 3800 热机械模拟器中进行 316L 钢的扩散结合实验，用于研究无损检测方法

扩散接合方法是 ITER 等聚变反应堆或几十年后的 DEMO 反应堆中等离子体表面组件的连接方法之一。在多瑙新城大学的 Gleeble 3800 热机械物理模拟器上对 316 L 样品的扩散粘合进行了研究，温度为 1000–1050 °C，压力为 20−30 MPa，在高真空条件下持续 40−80 分钟。发现了一种通过数值模拟揭示扩散键合表面接触电阻的新方法。采用相同参数对扩散接合样品进行 Gleeble 物理模拟和热影响区试验，但轴向蠕变变形不同。数值模拟显示扩散接合接缝处存在显着的接触电阻，这影响了轴向蠕变的差异。这样，通过Gleeble扩散接合过程的数值模拟，可以以非破坏性的方式估计接触电阻，并且可以更好地估计接合过程中接合缝的实际状态。这项工作还旨在准备用于进一步无损测试的样品。