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Recent Developments in Fatigue and Wear Research and Processing Technologies...
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Recent Developments in Fatigue and Wear Research and Processing Technologies for Various Materials to Meet the SDGs

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Materials Characterization".

Deadline for manuscript submissions: closed (10 June 2022) | Viewed by 4812

Special Issue Editor

Prof. Dr. Sotomi Ishihara

E-Mail Website
Guest Editor
National Institute of Technology, Toyama College, 13 Hongo, Toyama 939-8630, Japan
Interests: fatigue and fracture; corrosion fatigue; wear; reliability; biomechanics; thermal stress; materials characterization

Special Issue Information

Dear Colleagues,

It is known that most of the fractures and functional losses in machines and structures are caused by fatigue and wear. Various observation, measurement, experimental, and analytical methods have been used to study fatigue and wear behavior from macroscopic (continuous mechanics) to microscopic (heterogeneous mechanics) levels. In addition, since the observed experimental phenomena span many fields, including mechanical science, materials science, and chemistry, interdisciplinary analysis is necessary. Considering the Sustainable Development Goals (SDGs) that are being promoted internationally these days, it is necessary to give more consideration than ever to high efficiency (energy saving), environmental load reduction, and reuse technology in the design of strength and processing technology of machines and structures.

This Special Issue collects and provides readers with the latest research results related to fatigue, fracture, wear, and processing technology. Its purpose is threefold as follows: (a) To contribute to the development of the discipline by sharing and accumulating the valuable research results obtained among scholars; (b) to provide the reader with hints on new analytical methods for complex phenomena by showing analytical methods used in different disciplines or interdisciplinary fields; and (c) to provide readers with hints on future research directions to promote the SDGs.

It is my pleasure to invite you to submit a manuscript to this Special Issue. Full papers, communications, and reviews are all welcome. Areas of research include (but are not limited to) the topics outlined in the keywords.

Prof. Dr. Sotomi Ishihara
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. Materials is an international peer-reviewed open access semimonthly 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

  • fatigue
  • fracture
  • strength
  • wear
  • manufacturing
  • tooling and machining
  • high efficiency
  • resource saving
  • environment
  • reuse

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Published Papers (2 papers)

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Research

19 pages, 6832 KiB  
Article
Elasto-Plastic Fatigue Crack Growth Behavior of Extruded Mg Alloy with Deformation Anisotropy Due to Stress Ratio Fluctuation
by Kenichi Masuda, Sotomi Ishihara, Noriyasu Oguma, Minoru Ishiguro and Yoshinori Sakamoto
Materials 2022, 15(3), 755; https://doi.org/10.3390/ma15030755 - 19 Jan 2022
Cited by 2 | Viewed by 1534
Abstract
Fatigue crack growth (FCG) experiments were performed using a low-temperature extruded magnesium alloy AZ31 with texture. Under a constant maximum stress intensity factor (Kmax), the stress ratio R was changed from 0.1 to −1 during the fatigue crack growth process, and [...] Read more.
Fatigue crack growth (FCG) experiments were performed using a low-temperature extruded magnesium alloy AZ31 with texture. Under a constant maximum stress intensity factor (Kmax), the stress ratio R was changed from 0.1 to −1 during the fatigue crack growth process, and the FCG behavior before and after the R change was investigated. As a result, tensile twins were generated owing to the fatigue load on the compression side of R = −1, and the FCG velocity was accelerated. In addition, when the maximum compressive stress at R = −1 (|(σmin)R = −1|) exceeded the compressive yield strength of the material (σcy), the FCG velocity after R fluctuation greatly accelerated. On the other hand, under the condition |(σmin)R = −1| < σcy, the degree of acceleration of the FCG velocity due to R fluctuation was small. In either case, the degree of acceleration in the FCG increased as the Kmax value increased. The above FCG acceleration mechanism due to the R fluctuation was considered based on the observation of the deformation and twinning states of the fatigue crack tip, the fatigue crack closure behavior, and the cyclic stress–strain curve of the fatigue process. The FCG acceleration mechanism was as follows: First, the driving force of the FCG increased owing to the increase in crack opening displacement due to the generation of tensile twins. Second, the coalescence of the main crack and a plurality of microcracks were generated at the twin interface. The elasto-plastic FCG behavior after the stress ratio fluctuations is defined by the effective J-integral range ΔJeff. Full article
(This article belongs to the Special Issue Recent Developments in Fatigue and Wear Research and Processing Technologies for Various Materials to Meet the SDGs)
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19 pages, 5892 KiB  
Article
Effect of Rod-like Structure on Fatigue Life, Short Surface Crack Initiation and Growth Characteristics of Extruded Aluminum Alloy A2024 (Analysis via Modified Linear Elastic Fracture Mechanics)
by Kenichi Masuda, Sotomi Ishihara, Hiroshi Shibata and Noriyasu Oguma
Materials 2021, 14(24), 7538; https://doi.org/10.3390/ma14247538 - 8 Dec 2021
Cited by 5 | Viewed by 2482
Abstract
In the Al alloy A2024-T3 extruded material, a rod-like structure is generated parallel to the extrusion direction. In this study, the effects of rod-like structures on fatigue crack initiation and growth behavior were comprehensively investigated. Two types of specimens were used in a [...] Read more.
In the Al alloy A2024-T3 extruded material, a rod-like structure is generated parallel to the extrusion direction. In this study, the effects of rod-like structures on fatigue crack initiation and growth behavior were comprehensively investigated. Two types of specimens were used in a fatigue experiment, in which the direction of the load stress amplitude was parallel (specimen P) and perpendicular (specimen V) to the rod-like structure. Based on the experimental and analytical results, the following findings were obtained regarding the fatigue life, location of crack initiation, and fatigue crack growth behavior. Because the fatigue life of specimen P was longer than that of specimen V, it is inferred that the rod-like structure significantly affects the fatigue life. In specimen P, fatigue cracks were generated from the grain boundaries of the Al matrix. By contrast, in specimen V, cracks were generated from the Cu–Mg-based intermetallic compound in the Al matrix. In specimen P, fatigue cracks were more likely to propagate across the rod-like structure, which decreased the fatigue crack growth rate. In specimen V, fatigue cracks did not propagate across the rod-like structure; instead, they propagated through the Al matrix. Therefore, the fatigue crack growth resistance of specimen V was lower than that of specimen P. The relationship between the fatigue crack growth rate and the modified linear elastic fracture mechanics parameter could be used to predict the S–N curve (stress amplitude vs. fatigue life) and fatigue crack growth behavior. The predicted results agreed well with the experimental results. Full article
(This article belongs to the Special Issue Recent Developments in Fatigue and Wear Research and Processing Technologies for Various Materials to Meet the SDGs)
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