Modelling residual stress and mechanical performance of advanced joints for nuclear fusion

核聚变具有提供可持续和清洁电力的潜力。然而，与高附加值聚变部件的设计、制造和结构完整性相关的工程挑战尚未克服。一个典型的部件是繁殖毯，Eurofer97-Eurofer97焊接的类似接头和钨(W)-Eurofer97的不同焊接接头使用复杂的材料系统、复杂的连接几何形状和制造工艺。残余应力是焊接和铜焊等连接过程中产生的副作用，可能会限制部件的使用寿命。为了在2030年前完成下一个聚变反应堆的设计，现在是时候应用最先进的技术来检查和建立对焊接和铜焊Eurofer97的临界残余应力和机械行为的基本了解。这些都可以用有限元方法加以加强，以便为核聚变提供评估相似和不同接头的广泛力学行为的系统手段。

Nuclear fusion has the potential to offer sustainable and clean electricity. However, the engineering challenges associated with design, manufacturing and structural integrity of high value-added fusion components is yet to be overcome. A typical component is the breeding blanket, both Eurofer97- Eurofer97 welded similar joints and Tungsten (W) - Eurofer97 brazed dissimilar joints that utilise complex materials systems, complicated joining geometry and fabrication processes. Residual stress is a side effect inherited from joining processes, such as welding and brazing, and can limit the service life of the components. To complete design of the next fusion reactor by ~2030, it is timely to apply state-of-the-art techniques to examine and create fundamental understandings of the critical residual stress and mechanical behaviour of the welded and brazed Eurofer97. These can be enhanced with finite-element method to provide systematic means of evaluating a wide range of mechanical behaviour of similar and dissimilar joints for nuclear fusion.