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
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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