Investigation on the Durability of Ti-6Al-4V Alloy Designed in a Harmonic Structure via Powder Metallurgy: Fatigue Behavior and Specimen Size Parameter Issue
In the present work, the four-point bending loading fatigue properties of a heterogeneously distributed grain size microstructure consolidated from Ti-6Al-4V alloy powder are studied. The microstructure involved here, a so-called “harmonic structure”, possesses quasi-spherical large grain regions (“...
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MDPI AG
2020-05-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/5/636 |
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| author | Benjamin Guennec Takayuki Ishiguri Mie Ota Kawabata Shoichi Kikuchi Akira Ueno Kei Ameyama |
| author_facet | Benjamin Guennec Takayuki Ishiguri Mie Ota Kawabata Shoichi Kikuchi Akira Ueno Kei Ameyama |
| author_sort | Benjamin Guennec |
| collection | DOAJ |
| description | In the present work, the four-point bending loading fatigue properties of a heterogeneously distributed grain size microstructure consolidated from Ti-6Al-4V alloy powder are studied. The microstructure involved here, a so-called “harmonic structure”, possesses quasi-spherical large grain regions (“cores”) embedded in a continuous fine grain region (“shell”). Unlike the previous reports dealing with this issue, the effect of the specimen size on the fatigue characteristics is also probed, since two distinct specimen configurations are considered. Furthermore, the obtained experimental data are compared with the corresponding fatigue results derived from homogeneous coarse grain counterparts. Contrary to homogeneous structure material, discrepancies on both the fatigue strength and the fatigue crack initiation aspects are found for the harmonic structure material. Consequently, the present work aims to clarify the underlining phenomena involved in the specimen size effect detected for Ti-6Al-4V designed in the harmonic structure. A less active interface surface between the core and the shell combined with a wider critical volume in the large size specimen should be the main reasons of the fatigue strength discrepancy. |
| first_indexed | 2024-03-10T19:50:18Z |
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| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T19:50:18Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-1edf709b840c4d6db678e92b06b74e862023-11-20T00:25:03ZengMDPI AGMetals2075-47012020-05-0110563610.3390/met10050636Investigation on the Durability of Ti-6Al-4V Alloy Designed in a Harmonic Structure via Powder Metallurgy: Fatigue Behavior and Specimen Size Parameter IssueBenjamin Guennec0Takayuki Ishiguri1Mie Ota Kawabata2Shoichi Kikuchi3Akira Ueno4Kei Ameyama5Department of Mechanical System Engineering, Faculty of Engineering, Toyama Prefectural University, Kurokawa 5180, Imizu, Toyama 959-0398, JapanLead Frame Business Unit, Mitsui High-tec Inc., 965-1 Oaza Nakaizumi, Nogata, Fukuoka 822-0011, JapanDepartment of Mechanical Engineering, Faculty of Science and Engineering, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577, JapanDepartment of Mechanical Engineering, Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka 432-8561, JapanDepartment of Mechanical Engineering, Faculty of Science and Engineering, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577, JapanDepartment of Mechanical Engineering, Faculty of Science and Engineering, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577, JapanIn the present work, the four-point bending loading fatigue properties of a heterogeneously distributed grain size microstructure consolidated from Ti-6Al-4V alloy powder are studied. The microstructure involved here, a so-called “harmonic structure”, possesses quasi-spherical large grain regions (“cores”) embedded in a continuous fine grain region (“shell”). Unlike the previous reports dealing with this issue, the effect of the specimen size on the fatigue characteristics is also probed, since two distinct specimen configurations are considered. Furthermore, the obtained experimental data are compared with the corresponding fatigue results derived from homogeneous coarse grain counterparts. Contrary to homogeneous structure material, discrepancies on both the fatigue strength and the fatigue crack initiation aspects are found for the harmonic structure material. Consequently, the present work aims to clarify the underlining phenomena involved in the specimen size effect detected for Ti-6Al-4V designed in the harmonic structure. A less active interface surface between the core and the shell combined with a wider critical volume in the large size specimen should be the main reasons of the fatigue strength discrepancy.https://www.mdpi.com/2075-4701/10/5/636fatiguetitanium alloybimodal structuresize effectEBSD investigationfatigue crack growth |
| spellingShingle | Benjamin Guennec Takayuki Ishiguri Mie Ota Kawabata Shoichi Kikuchi Akira Ueno Kei Ameyama Investigation on the Durability of Ti-6Al-4V Alloy Designed in a Harmonic Structure via Powder Metallurgy: Fatigue Behavior and Specimen Size Parameter Issue Metals fatigue titanium alloy bimodal structure size effect EBSD investigation fatigue crack growth |
| title | Investigation on the Durability of Ti-6Al-4V Alloy Designed in a Harmonic Structure via Powder Metallurgy: Fatigue Behavior and Specimen Size Parameter Issue |
| title_full | Investigation on the Durability of Ti-6Al-4V Alloy Designed in a Harmonic Structure via Powder Metallurgy: Fatigue Behavior and Specimen Size Parameter Issue |
| title_fullStr | Investigation on the Durability of Ti-6Al-4V Alloy Designed in a Harmonic Structure via Powder Metallurgy: Fatigue Behavior and Specimen Size Parameter Issue |
| title_full_unstemmed | Investigation on the Durability of Ti-6Al-4V Alloy Designed in a Harmonic Structure via Powder Metallurgy: Fatigue Behavior and Specimen Size Parameter Issue |
| title_short | Investigation on the Durability of Ti-6Al-4V Alloy Designed in a Harmonic Structure via Powder Metallurgy: Fatigue Behavior and Specimen Size Parameter Issue |
| title_sort | investigation on the durability of ti 6al 4v alloy designed in a harmonic structure via powder metallurgy fatigue behavior and specimen size parameter issue |
| topic | fatigue titanium alloy bimodal structure size effect EBSD investigation fatigue crack growth |
| url | https://www.mdpi.com/2075-4701/10/5/636 |
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