Microbeam X-ray diffraction from the cross-section of metallic materials with inhomogeneous structure

Tizuko Maeda, Keiichi Maruta, Osamu Furukimi, Nobuyuki Morito

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The accuracy in the determination of lattice parameters of diffraction patterns by means of microbeam X-ray diffraction method has been studied with a curved position sensitive proportional counter for the cross-sectional measurements of partially crystallized Fe-B-Si amorphous ribbons and sintered Ni-Cu-Mo alloyed steels after case-hardening. It was found that the accuracy of lattice parameters was 0.2% when the parallel X-ray beam with 50 μm width was used. The sizes of X-ray spots at the specimen surface were two or three times as large as those of the collimeters. The crystalline phases formed in a thick amorphous ribbon by rapid quenching of Fe78.5B13Si8.5 alloy liquid were α-Fe(Si) and Fe2B. The critical thickness of glass formation in the present quenching condition was about 40 μm. Standard diviation of the dimensional change in the sintered compacts of Ni-Cu-Mo alloyed steel powders became smaller when Ni content increased, because microstrain in the martensitic structure became smaller with Ni content after case-hardening.

    Original languageEnglish
    Pages (from-to)2052-2059
    Number of pages8
    JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
    Volume77
    Issue number11
    DOIs
    Publication statusPublished - 1991

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Physical and Theoretical Chemistry
    • Metals and Alloys
    • Materials Chemistry

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