Structural changes in martensite foils at the tips of microcracks arising as a result of stress relaxation

Previously abstracted from original as item 9108-31-3646. Variations in the structure at the apexes of microcracks in structural materials with pile martensite structure have been studied by electron diffraction microscopy. It is shown that variations at the crack apex occur successively as a result...

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Bibliographic Details
Published in:Strength of materials 1990-12, Vol.22 (12), p.1834-1840
Main Authors: ETERASHVILI, T. V, KUTELIYA, E. R, KHASIYA, N. I, BASHALEISHVILI, Z. B
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals. Metallurgy
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
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Summary:Previously abstracted from original as item 9108-31-3646. Variations in the structure at the apexes of microcracks in structural materials with pile martensite structure have been studied by electron diffraction microscopy. It is shown that variations at the crack apex occur successively as a result of stress relaxation. Slip bands are formed first, then reorientation zones (RZ) and dislocation-free zones (DFZ). The final stage is appearance of submicrocracks in DFZ which then merge into the main crack. Dislocation structure at the crack apexes has been studied with mechanisms of submicrocrack nucleation analysed.
ISSN:0039-2316
1573-9325
DOI:10.1007/BF00769135