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Metals
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Fatigue Behaviour of Aluminum Alloys
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Fatigue Behaviour of Aluminum Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Failure Analysis".

Deadline for manuscript submissions: 30 June 2024 | Viewed by 1385

Special Issue Editors

Dr. Jiayi Zhang

E-Mail Website
Guest Editor
Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China
Interests: aluminium; nickel-based superalloys; materials characterization
Dr. Fei Liu

E-Mail Website
Guest Editor
School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
Interests: aluminium alloy; nickel alloy; microstructure; fatigue crack propagation; mechanical properties

Special Issue Information

Dear Colleagues,

The fatigue behaviour of aluminium alloys is observed when aluminium alloys are damaged under the action of alternating stresses. Under the action of alternating pressure over time, micro-cracks are formed in local high-stress areas, and then the micro-cracks are gradually expanded to fractures. Topics of interest for this Special Issue include: novel fatigue testing and characterization methods for aluminium alloys; multiaxial fatigue and complex loading effects of aluminium alloys and structures; fatigue in the very high cycle regime; modelling; applications of technologies associated with fatigue; fatigue analysis of aluminium alloys; and structures based on data science.

Dr. Jiayi Zhang
Dr. Fei Liu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • aluminium alloys
  • fatigue behaviour
  • novel fatigue testing
  • multiaxial fatigue
  • high-cycle regime
  • fatigue analysis
  • micro-cracks
  • modeling

Published Papers (1 paper)

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Research

27 pages, 8169 KiB  
Article
Modified Split Mandrel Method and Equipment to Improve the Fatigue Performance of Structural Components with Fastener Holes
by Jordan Maximov, Galya Duncheva, Angel Anchev, Vladimir Dunchev and Petya Daskalova
Metals 2024, 14(3), 303; https://doi.org/10.3390/met14030303 - 03 Mar 2024
Viewed by 848
Abstract
Fastener holes are among the most common natural stress concentrators in metal structures. The life cycles of various structural elements, such as those in aircraft structures, automobiles, and rail-end bolt joints, are limited by fatigue damage around the holes. An effective approach to [...] Read more.
Fastener holes are among the most common natural stress concentrators in metal structures. The life cycles of various structural elements, such as those in aircraft structures, automobiles, and rail-end bolt joints, are limited by fatigue damage around the holes. An effective approach to delay the formation and growth of fatigue macrocracks is to introduce residual hoop compressive stresses around the holes. Two methods have become established in the prestressing of fastener holes in aircraft components, split sleeve and split mandrel, which implement one-sided processes. The common disadvantage of both methods is the complex procedure due to the need for high accuracy of the initial holes. This article presents a new modified split mandrel method providing the same tightness (interference fit) with a wide tolerance of the pre-drilled hole diameters, reducing the number of technological cycle steps and production costs. To implement the new method, a functionally connected tool and a device with a hydraulic drive were developed. An extensive experimental study of 2024-T3 AA specimens was carried out to evaluate the effectiveness of the method under a high scattering of the pre-drilled holes. The new method provided a deep zone of residual hoop compressive stresses on both faces of the specimens after cold working and after hole final reaming. The removal of a plastically deformed layer around the hole of suitable thickness during the final reaming decreased the axial gradient of residual hoop stress distribution. Fatigue tests on a tensile pulsating cycle verified the effectiveness of the modified split mandrel method to significantly increase the fatigue life by 6.6 times based on 106 cycle fatigue strength compared to the conventional case of machining the holes. The obtained S-N curves for three groups of samples with initial hole diameters of 8.0, 8.1, and 8.2 mm, which were cold worked with the same tightness of 0.32 mm and final reamed, aligned well, indicating that the new method can provide constant fatigue strength for a given stress amplitude. Full article
(This article belongs to the Special Issue Fatigue Behaviour of Aluminum Alloys)
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