Influence of Long-Term Operation on the Structure and Physicomechanical Properties of D16- and V95-Type Aluminum Alloys

We establish the fact of degradation of the properties in D16- and V95-type alloys from the wing skin of an AN-12 airplane after long-term operation for 40 yr, which mainly manifests itself in the decrease in their plasticity (relative elongation δ) and the characteristics of cyclic crack-resistance...

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Bibliographic Details
Published in:Materials science (New York, N.Y.) N.Y.), 2013-07, Vol.49 (1), p.13-24
Main Authors: Ostash, O. P., Andreiko, I. M., Markashova, L. І., Holovatyuk, Yu. V., Semenets’, О. І., Koval’chuk, L. B.
Format: Article
Language:English
Subjects:
Alloys
Aluminum alloys
Analysis
Characterization and Evaluation of Materials
Chemistry and Materials Science
Electrical conductivity
Evaluation
Materials Science
Solid Mechanics
Specialty metals industry
Structural Materials
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Summary:We establish the fact of degradation of the properties in D16- and V95-type alloys from the wing skin of an AN-12 airplane after long-term operation for 40 yr, which mainly manifests itself in the decrease in their plasticity (relative elongation δ) and the characteristics of cyclic crack-resistance (fatigue threshold Δ K th and cyclic fracture toughness Δ K fc ). It is shown that the degradation of the mechanical characteristics of these alloys is connected with the changes in their fine structure and the mechanisms of microfracture depending on the level of loading of different zones of the wing. It is shown that the process of degradation can be monitored by analyzing the changes in the electric conductivity of the degraded alloys.
ISSN:1068-820X
1573-885X
DOI:10.1007/s11003-013-9578-2