title: Multiscale architectured materials with composition and grain size gradients manufactured using high-pressure torsion.
abstract: The concept of multiscale architectured materials is established using composition and grain size gradients. Composition-gradient nanostructured materials are produced from coarse grained interstitial free steels via carburization and high-pressure torsion. Quantitative analyses of the dislocation density using X-ray diffraction and microstructural studies clearly demonstrate the gradients of the dislocation density and grain size. The mechanical properties of the gradient materials are compared with homogeneous nanostructured carbon steel without a composition gradient in an effort to investigate the gradient effect. Based on the above observations, the potential of multiscale architecturing to open a new material property is discussed.
authors.affiliation: Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea.
authors.forename: Ji Yun
authors.initials: JY
authors.lastname: Kang
authors.affiliation: Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea.
authors.forename: Jung Gi
authors.initials: JG
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea.
authors.forename: Hyo Wook
authors.initials: HW
authors.lastname: Park
authors.affiliation: Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea.
authors.forename: Hyoung Seop
authors.initials: HS
authors.lastname: Kim