[2017 05 17] 정기세미나 9th

Neutron Diffraction Analyses of Structural Materials

Using Research Reactor HANARO

■ Date: 2017. 05. 17(WED) , 17:00 ~ 18:15

■ Place: Science BuildingⅠ, Room.202 Multimedia Room

■ Speaker: Prof. Wanchuck Woo, (Korea Atomic Energy Reesearch Inst.)

■ Host of a Seminar: Prof. Hyoung Seop Kim

※ Speaker Language: ENGLISH

■ Abstract:

Neutron diffraction has become a well-established technique for the understanding of the mechanical properties and deformation behaviours in various metals and alloys. The unique advantages of neutron diffraction science include the deep penetration, three-dimensional mapping capability, and volume averaged bulk measurement characteristics of the neutron beam. In this presentation, I would like to present a brief introduction to the neutron diffraction and a few research subjects, which bridge microstructure and physical, mechanical properties in structural materials. Examples include: 1) residual stress distributions of extra thick welds and its influence on the fracture toughness and crack propagation, 2) anisotropic deformation behaviour (stress partitioning) between stiff and compliant phases or (hkl) grains in a dual phase steel, AlSi10Mg additive manufactured specimen, and AlCoCrFeNi high-entrophy alloy, 3) stress, texture, and grain structure evolutions under the friction-stir processing. In addition, a brief summary will be provided for the nano-cluster (precipitate) analysis and neutron radiography imaging method. These studies can enhance the understanding of the relationship between microstructure and mechanical properties in structural materials.

Department of Materials Science and Engineering