Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
4.4
2.9
Journals
Metals
Special Issues
Fatigue Behavior in Metallic Materials
share announcement

Fatigue Behavior in Metallic Materials

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

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 5495

Special Issue Editor

Dr. Shafaqat Siddique

E-Mail Website
Guest Editor
Department of Mechanical Engineering, University of Lahore, Lahore, Pakistan
Interests: additive manufacturing; microstructure; mechanical behavior; fatigue damage; very high cycle fatigue (VHCF); hybrid manufacturing

Special Issue Information

Dear Colleagues,

There has been a lot of advancements in the development of new materials as well as processing of conventional materials by non-traditional manufacturing routes so as to improve the mechanical performance of functional materials. Such advancements are to be justified on the basis of their functional properties depending on their application. For structural applications, their performance needs to be characterized in terms of mechanical properties e.g. tension, compression, torsional loading under static, quasistatic or dynamic loading conditions. Majority of the research output focuses on static behavior, as the characterization of long-term fatigue life life is cumbersome and expensive process; however for the reliable dynamic performance of materials, especially relatively novel materials whose behaviour remains less-known, their fatigue performance needs to be focused on.

This issue aims at encouraging the researchers working in the field of mechanical characterization to report primarily original research focusing on fatigue performance of materials as a function of process (in-process and post-process) parameters as well as material aspects. Goal is not only to have recent developments of fatigue literature of novel materials and processes, but also to understand the underlying process- and material-based characteristics influencing the fatigue behaviour. High quality reviews developing an understanding of the fatigue phenomena are also encouraged. Research in the areas ranging from low cycle fatigue to very high cycle fatigue are welcomed.

Dr. Shafaqat Siddique
Guest Editor

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

  • metallic materials
  • fatigue
  • microstructure
  • manufacturing processes
  • mechanical performance

Published Papers (4 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

Jump to: Review

20 pages, 6342 KiB  
Article
Influence of the Ductility Exponent on the Fatigue of Structural Steels
by Martin Kreithner, Alexander Niederwanger and Robert Lang
Metals 2023, 13(4), 759; https://doi.org/10.3390/met13040759 - 13 Apr 2023
Cited by 2 | Viewed by 1491
Abstract
Fatigue models using the strain-life method do not show exact conformity with the empirical results. Therefore, the use of the mean-stress correction approach is to be evaluated, with a particular focus on mild and higher-strength steel. The influence of the ductility parameters will [...] Read more.
Fatigue models using the strain-life method do not show exact conformity with the empirical results. Therefore, the use of the mean-stress correction approach is to be evaluated, with a particular focus on mild and higher-strength steel. The influence of the ductility parameters will be studied. A potential favorable development of structural steels with regard to ductility will be checked. The paper will focus on two types of structural steel: S355 and S700. Initially, the mechanical properties of the steel test specimens were measured via a tensile testing rig. In addition, a fatigue test was carried out by applying various mean-stresses. Surface roughness was measured at the notch and introduced into the initial model. The strain amplitudes were determined using the Ramberg-Osgood and Masing material models. Subsequently, a curve fitting was applied to the strain-life data for the fatigue ductility exponent. The multiparameter model was fitted with only one parameter. The resulting model showed a good fit between the strain-life curve and the test results. During the course of the optimization, the error and the scatter were calculated separately for steel types S355 and S700. Based on the ductility exponent, a favorable behavior of the materials was determined. Full article
(This article belongs to the Special Issue Fatigue Behavior in Metallic Materials)
►▼ Show Figures

Figure 1

23 pages, 20475 KiB  
Article
Effect of Preload on Tensile Fracture of Variable Cross-Section Bolts: Experiment and Simulation
by Shuguang Yao and Meng Zhang
Metals 2023, 13(4), 744; https://doi.org/10.3390/met13040744 - 11 Apr 2023
Cited by 1 | Viewed by 1153
Abstract
High-strength bolts are widely used in structural connections, and the preload affects the failure behavior of bolts. In this paper, a variable cross-section bolt (VCSB) with weakened strength to induce fracture is designed. Quasi-static tensile experiments with different preload torque values were performed [...] Read more.
High-strength bolts are widely used in structural connections, and the preload affects the failure behavior of bolts. In this paper, a variable cross-section bolt (VCSB) with weakened strength to induce fracture is designed. Quasi-static tensile experiments with different preload torque values were performed on the VCSB. The preload torques of 0, 430, 610, and 820 N·m were applied to the VCSB connection structures before the test. The load–displacement curves obtained by the test could be divided into three stages: the initial elastic phase, the yield phase, and the rapidly necking phase. As the preload increased, the stiffness of the initial elastic phase increased from 101.21 kN/mm to 270.64 kN/mm and the fracture displacement DC decreased from 10.54 mm to 8.42 mm. Finite element models were developed to simulate the failure process of VCSB under tensile loads. The difference between the FB and DC values in the simulation results and the test is within 2%. The simulations were carried out by adjusting the prestress from 0 to 650 MPa. The results show that the value of preload force has no effect on the FB of VCSB, but greatly influences the DC and FC of the connection. Full article
(This article belongs to the Special Issue Fatigue Behavior in Metallic Materials)
►▼ Show Figures

Figure 1

16 pages, 4502 KiB  
Article
Notch Fatigue Life Prediction Model Considering Stress Gradient Influence Depth and Weight Function
by Yiheng Tang, Yanxuan Song, Guofu Yin and Ying Nie
Metals 2023, 13(3), 539; https://doi.org/10.3390/met13030539 - 07 Mar 2023
Cited by 2 | Viewed by 1720
Abstract
Notch characteristics significantly affect the fatigue performance of engineered components, for which the stress gradient effect is worth careful consideration. The traditional stress gradient analysis method based on the Coffin–Manson equation does not take into account the stress gradient influence range regarding the [...] Read more.
Notch characteristics significantly affect the fatigue performance of engineered components, for which the stress gradient effect is worth careful consideration. The traditional stress gradient analysis method based on the Coffin–Manson equation does not take into account the stress gradient influence range regarding the definition of the stress gradient correction factor, nor the high-stress gradient region, which has a greater influence on fatigue life. To address the aforementioned problems, a new notch fatigue life model is proposed in this paper. First, the stress–strain field at the root of the notch is analyzed to define the depth of stress gradient influence, following which the influence of the low-stress gradient region is reduced by a weighting function in the calculation of the stress gradient correction factor. Finally, to validate the method, three sets of experimental data, including TC4, GH4169, and EN8B, were used and compared with three other models. The results demonstrate that the predicted lifetimes of the new model are all within a 2-fold dispersion band, and the prediction ability is better than that of the other three models. Full article
(This article belongs to the Special Issue Fatigue Behavior in Metallic Materials)
►▼ Show Figures

Figure 1

Review

Jump to: Research

20 pages, 8697 KiB  
Review
A Comprehensive Review of Fatigue Strength in Pure Copper Metals (DHP, OF, ETP)
by Eduardo Jiménez-Ruiz, Rubén Lostado-Lorza and Carlos Berlanga-Labari
Metals 2024, 14(4), 464; https://doi.org/10.3390/met14040464 - 15 Apr 2024
Viewed by 729
Abstract
Due to their exceptional electrical and thermal conductivity properties, high-purity copper (Cu-DHP) and copper alloys of similar composition, such as electrolytic tough-pitch (ETP), oxygen-free electronic (OFE) and oxygen-free (OF), have often been used in the manufacture of essential components for the electrical, electronic [...] Read more.
Due to their exceptional electrical and thermal conductivity properties, high-purity copper (Cu-DHP) and copper alloys of similar composition, such as electrolytic tough-pitch (ETP), oxygen-free electronic (OFE) and oxygen-free (OF), have often been used in the manufacture of essential components for the electrical, electronic and power generation industries. Since these components are subject to cyclic loads in service, they can suffer progressive structural damage that causes failure due to fatigue. The purpose of this review is to examine the most relevant aspects of mechanical fatigue in Cu-DHP, ETP, OFE and OF. The impact of many factors on fatigue strength (Se), including the frequency, temperature, chemical environment, grain size, metallurgical condition and load type, were analyzed and discussed. Stress–life (S-N) curves under zero mean stress (σm = 0) were found for high-cycle fatigue (HCF). For non-zero mean stress (σm ≠ 0), stress curves were based on a combination of Gerber, Soderberg and ASME elliptic failure criteria. Stress–life (S-N) curves were also developed to correlate fatigue strength (Se) with stress amplitude (σa), yield strength (Syp) and ultimate strength (Sut). Finally, for low-cycle fatigue (LCF), strain–life (ε-N) curves that establish a relationship between the number of cycles to failure (N) and total strain amplitude (εplastic) were determined. Hence, this review, as well as the proposed curves, provide valuable information to understand fatigue failure for these types of materials. Full article
(This article belongs to the Special Issue Fatigue Behavior in Metallic Materials)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-4
Back to TopTop