Structural materials used in transportation equipment are required to have various characteristics according to the environment in which they are used. Since the safety of these devices is directly related to human life, the reliability of the materials is particularly required. In addition, since long-term use is expected in many cases, ensuring long-term reliability and remaining life is an important issue. The main causes of material degradation are fatigue, corrosion, creep, delayed fracture, etc. Of course, many research efforts have been made to overcome this issue. However, as the properties required of materials increase, the causes of degradation have become complex, such as corrosion fatigue and dwell-fatigue, and although the issue itself is not new, it is difficult to say that it has yet to be solved. In addition to conventional material processes, additive manufacturing and new joining technologies have been developed, and there is an increasing demand for elucidating the fracture mechanism and improving the properties of new material processes. Therefore, the purpose of this symposium is to discuss common basic issues in various structural materials and methods for solving these issues, including various approaches such as experimental, simulation, data science and so on. In addition to simply addressing issues related to material properties and performance, methods for monitoring degradation phenomena in the operating environment will be discussed. The final goal is to find research directions that will lead to ensuring the long-term reliability of structural materials.
