title: Magnetic scattering in the simultaneous measurement of small-angle neutron scattering and Bragg edge transmission from steel.
abstract: Pulsed neutron sources enable the simultaneous measurement of small-angle neutron scattering (SANS) and Bragg edge transmission. This simultaneous measurement is useful for microstructural characterization in steel. Since most steels are ferromagnetic, magnetic scattering contributions should be considered in both SANS and Bragg edge transmission analyses. An expression for the magnetic scattering contribution to Bragg edge transmission analysis has been derived. The analysis using this expression was applied to Cu steel. The ferrite crystallite size estimated from this Bragg edge transmission analysis with the magnetic scattering contribution was larger than that estimated using conventional expressions. This result indicates that magnetic scattering has to be taken into account for quantitative Bragg edge transmission analysis. In the SANS analysis, the ratio of magnetic to nuclear scattering contributions revealed that the precipitates consist of body-centered cubic Cu0.7Fe0.3and pure Cu, which probably has 9R structure including elastic strain and vacancies. These results show that effective use of the magnetic scattering contribution allows detailed analyses of steel microstructure.
authors.affiliation: Research Reactor Institute, Kyoto University , 2 Asashiro-nishi, Kumatori, Osaka 590-0494, Japan.
authors.forename: Yojiro
authors.initials: Y
authors.lastname: Oba
authors.affiliation: Department of Aerospace Engineering, Tokyo Metropolitan University , 6-6 Asahigaoka, Hino, Tokyo 191-0065, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Morooka
authors.affiliation: Comprehensive Research Organization for Science and Society , 162-1 Shirakata, Tokai, Ibaraki 319-1106, Japan.
authors.forename: Kazuki
authors.initials: K
authors.lastname: Ohishi
authors.affiliation: Research Reactor Institute, Kyoto University , 2 Asashiro-nishi, Kumatori, Osaka 590-0494, Japan.
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Sato
authors.affiliation: Research Reactor Institute, Kyoto University , 2 Asashiro-nishi, Kumatori, Osaka 590-0494, Japan.
authors.forename: Rintaro
authors.initials: R
authors.lastname: Inoue
authors.affiliation: Department of Mechanical Engineering, Toyohashi University of Technology , 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan.
authors.forename: Nozomu
authors.initials: N
authors.lastname: Adachi
authors.affiliation: Comprehensive Research Organization for Science and Society , 162-1 Shirakata, Tokai, Ibaraki 319-1106, Japan.
authors.forename: Jun-Ichi
authors.initials: JI
authors.lastname: Suzuki
authors.affiliation: Department of Materials Science and Engineering, Kyushu University , 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Tsuchiyama
authors.affiliation: Bragg Institute, Australian Nuclear Science and Technology Organisation , Locked Bag 2001, Kirrawee DC, NSW 2232, Australia.
authors.forename: Elliot Paul
authors.initials: EP
authors.lastname: Gilbert
authors.affiliation: Research Reactor Institute, Kyoto University , 2 Asashiro-nishi, Kumatori, Osaka 590-0494, Japan.
authors.forename: Masaaki
authors.initials: M
authors.lastname: Sugiyama
keywords: Bragg edge transmission; magnetic scattering; small-angle neutron scattering; steel