Cohesion properties and irradiation tolerance of W-Fe graded interfaces from molecular dynamics simulation

作者：Chen, Liang^*; Wang, Qian; Wang, Lei; Gong, Haoran

来源：Journal of Nuclear Materials, 2022, 570: 153986.

DOI：10.1016/j.jnucmat.2022.153986

• Cohesion strength
• Irradiation damage
• Mechanical properties
• W-Fe graded interfaces
• Molecular dynamic simulation

The present work is devoted to construct W-Fe graded interfaces with excellent interface cohesion and irradiation resistance. The adhesion and fracture toughness of various W-Fe graded bilayers are systematically explored, and the results reveal that the layer amount of W-rich side is supposed to be designed as many as possible, in order to derive more high strength and outstanding fracture toughness of W-Fe graded interfaces. It also shows that the addition of Fe in the W-rich side and the addition of W in the Fe-rich side both can improve the irradiation resistance in terms of mechanical properties. However, the additive composition in the Fe-rich side is much bigger than that in the W-rich side. In combination with interface strength and fracture toughness, as well as irradiation tolerance, a graded structure design of W90Fe10/W75Fe25 /W6(0)Fe(40)/W40Fe60/W25Fe75 is suggested from a theoretical perspective.

• 单位
  南昌航空大学