| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Steels for Sustainable Development III
|
| Presentation Title |
Microstructure and Mechanical Properties in TIG Welded Joints of Advanced Reduced-Activation Alloy for Fusion Reactor |
| Author(s) |
Kyoung-Hwan Kim, Joonoh Moon, Yi-Hyun Park |
| On-Site Speaker (Planned) |
Kyoung-Hwan Kim |
| Abstract Scope |
Reduced-activation ferritic/martensitic (RAFM) steels are strong candidate structural material for the breeding blanket in fusion reactor. The welding is an indispensable process to assemble the reactor. During welding, the designed microstructures of the base steels are changed significantly, deteriorating mechanical properties. The aim of this study is to investigate the microstructure evolution and its effects on the mechanical properties in the welds of advanced reduced-activation alloy (ARAA, Zr-containing RAFM steel). For this purpose, tungsten inert gas (TIG) welding were carried out with solid wires containing different chemical compositions on ARAA plates. The microstructures were identified using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses. The mechanical properties were evaluated by tensile tests, Charpy V-notch impact tests, and Vickers hardness tests. Finally, the change of mechanical properties of the welds compared to the base steel was carefully discussed in terms of microstructure evolution by changing weld chemical compositions. |