High-resolution transmission electron microscopic observation of stacking faults in Fe-35 mol%Al alloy with ordered B2 structure

Zhi Yi Song, Moritaka Hida, Akira Sakakibara, Yoshito Takemoto

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Abstract

Stacking faults in an Fe-35 mol%Al alloy with the B2 ordered superlattice structure have been investigated by a diffraction contrast method of transmission electron microscopy (TEM). The detailed observation by a phase contrast method of high-resolution transmission electron microscopy (HRTEM) has also been performed on the alloy. Two types of stacking faults were observed by HRTEM. In order to interpret the experimental images, computer simulations of HRTEM images based on different fault models have been carried out. The image simulations reveal that the model of the stacking faults deduced from the diffraction contrast method of TEM (i.e. the displacement vector R=a〈100〉/2) cannot fit one type of the HRTEM images. In the present study, a possible model of the faults (R=(1 - √3)a〈100〉/2) and a mechanism for their production are proposed.

Original languageEnglish
Pages (from-to)109-114
Number of pages6
JournalMaterials Transactions
Volume37
Issue number2
Publication statusPublished - Feb 1996

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Keywords

  • B2 Structure
  • Computer simulation of high-resolution electron micrograph
  • FeAl alloy
  • High-resolution electron microscopy
  • Stacking fault

ASJC Scopus subject areas

  • Engineering(all)

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