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Metals
Special Issues
Fracture and Fatigue of Advanced Metallic Materials
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Fracture and Fatigue of Advanced Metallic Materials

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Structural Integrity of Metals".

Deadline for manuscript submissions: 30 November 2024 | Viewed by 1844

Special Issue Editors

Dr. Xuechong Ren

E-Mail Website
Guest Editor
National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China
Interests: fracture; fatigue; additive manufacturing alloys; high-performance steel
Prof. Dr. Guian Qian

E-Mail Website
Guest Editor
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
Interests: fracture; ultra-high-cycle fatigue; additive manufacturing alloys
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue aims to collate original research articles and reviews on the field of fatigue and fracture of metallic materials. Fatigue and fracture are important forms of failure in structural materials. Research into them plays an important role in evaluating the integrity and safety of engineering structures.

This Special Issue mainly focuses on, but is not limited to, the following areas: the fatigue mechanism of metal materials, fatigue behavior in specific environments, ultra-high-cycle fatigue, multi-axis fatigue, fatigue crack propagation, fatigue statistical methods, fracture and crack arrest behavior of materials, microscopic mechanisms of fracture, etc. The fatigue and fracture of advanced metallic materials will receive special attention. Advanced materials mainly include additive manufacturing alloys, high-entropy alloys, coated metals, high-performance steel and environmentally friendly alloys, etc.

Dr. Xuechong Ren
Prof. Dr. Guian Qian
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

  • fracture
  • fatigue
  • metallic material
  • additive manufacturing alloys
  • high-entropy alloys

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Published Papers (2 papers)

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Research

23 pages, 4248 KiB  
Article
Two Fatigue Life Prediction Models Based on the Critical Plane Theory and Artificial Neural Networks
by Yantian Wang, Yuanying Qiu, Jing Li and Jin Bai
Metals 2024, 14(8), 938; https://doi.org/10.3390/met14080938 - 16 Aug 2024
Viewed by 514
Abstract
Since a multiaxial loading environment may lead to the fatigue failure of structures, establishing a reliable fatigue model to predict the multiaxial fatigue lives of structures has always been a concern of engineers. This study proposes a new multiaxial fatigue theoretical model (WYT [...] Read more.
Since a multiaxial loading environment may lead to the fatigue failure of structures, establishing a reliable fatigue model to predict the multiaxial fatigue lives of structures has always been a concern of engineers. This study proposes a new multiaxial fatigue theoretical model (WYT model) based on the critical plane theory, which takes the plane of the maximum shear strain amplitude as the critical plane and considers the effects of shear stress and normal stress on fatigue damage. Moreover, a backpropagation neural network (BPNN) model for multiaxial fatigue life prediction with the shear strain amplitude, normal strain amplitude, mean shear stress, and mean normal stress on the same critical plane as input parameters and fatigue life as the output variable is established. Finally, the WYT model and the BPNN model are compared with two existing multiaxial fatigue models to evaluate the life prediction effects of different models for S45C and 7075-T651 under constant-amplitude and variable-amplitude multiaxial loadings. The calculation results show that the WYT model is feasible, and the BPNN model is more accurate in predicting the fatigue lives of specimens than other multiaxial fatigue theoretical models. Full article
(This article belongs to the Special Issue Fracture and Fatigue of Advanced Metallic Materials)
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18 pages, 21186 KiB  
Article
Investigation of Residual Stress Distribution and Fatigue of 7050-T7451 Alloy Hole Components with Laser Shock and Ultrasonic Extrusion
by Yinfang Jiang, Xiancheng Liu, Yangyang Wang, Lingling Cui, Guang Ji and Wei Liu
Metals 2024, 14(5), 597; https://doi.org/10.3390/met14050597 - 19 May 2024
Viewed by 928
Abstract
Small-hole structures, such as the millions of fastener holes found on aircraft, are typical stress-concentration structures prone to fatigue failure. To further improve the strengthening process of this small-hole structure, we make up for the limitations of laser shock processing (LSP) of small [...] Read more.
Small-hole structures, such as the millions of fastener holes found on aircraft, are typical stress-concentration structures prone to fatigue failure. To further improve the strengthening process of this small-hole structure, we make up for the limitations of laser shock processing (LSP) of small holes by combining it with the ultrasonic extrusion strengthening (UES) process to form a new strengthening method—laser shock and ultrasonic extrusion strengthening (LUE). The influence of the LUE process sequence and process parameters on residual stress distribution was studied through FEM, and the gain of fatigue life of specimens after LUE strengthening was also explored through tests. The results show that when using LUE technology, the friction force decreases with the increase in amplitude and decreases by 3.2% when the amplitude is maximum. The LUE process eliminates the thickness effect generated by LSP, which can achieve good stress distribution of small-hole components under smaller laser shock peak pressure, and reduces equipment power. LUE can significantly improve the fatigue life of small-hole components, and the maximum fatigue life gain can be up to 310.66%. Full article
(This article belongs to the Special Issue Fracture and Fatigue of Advanced Metallic Materials)
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