Cumulative Damage in Very High/Low Cycle Combined Fatigue for TC21 Titanium Alloy
The effect of low cycle fatigue (LCF) predamage with no precracks on very high cycle fatigue (VHCF) properties, and crack initiation characteristics for TC21 titanium alloy, was investigated. The results showed that LCF predamage with less than 5% of fatigue life had little influence on fatigue limi...
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| Format: | Article |
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MDPI AG
2022-11-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/12/12/1702 |
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| author | Baohua Nie Shuai Liu Yue Wu Yu Song Haiying Qi Binqing Shi Zihua Zhao Dongchu Chen |
| author_facet | Baohua Nie Shuai Liu Yue Wu Yu Song Haiying Qi Binqing Shi Zihua Zhao Dongchu Chen |
| author_sort | Baohua Nie |
| collection | DOAJ |
| description | The effect of low cycle fatigue (LCF) predamage with no precracks on very high cycle fatigue (VHCF) properties, and crack initiation characteristics for TC21 titanium alloy, was investigated. The results showed that LCF predamage with less than 5% of fatigue life had little influence on fatigue limit, but reduced its fatigue life. Fatigue cracks were initiated on the surface of the specimen at high stress amplitude, whereas fatigue cracks were initiated on the subsurface of the specimens at low stress amplitude. Based on Lemaitre damage theory, a very high/low cycle combined fatigue damage model was established to analyze the fatigue damage process, which was consistent with the experimental data. It was indicated that 5% LCF predamage value was the equivalent damage value, which was close to the critical value of VHCF crack initiation. The fatigue crack initiation of the specimens with LCF predamage less than 5% took up the major components of fatigue life. |
| first_indexed | 2024-03-09T17:10:09Z |
| format | Article |
| id | doaj.art-3d234a924c0b4bcd86206c0e927d3d0b |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T17:10:09Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-3d234a924c0b4bcd86206c0e927d3d0b2023-11-24T14:09:29ZengMDPI AGCrystals2073-43522022-11-011212170210.3390/cryst12121702Cumulative Damage in Very High/Low Cycle Combined Fatigue for TC21 Titanium AlloyBaohua Nie0Shuai Liu1Yue Wu2Yu Song3Haiying Qi4Binqing Shi5Zihua Zhao6Dongchu Chen7School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, ChinaSchool of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, ChinaSchool of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, ChinaSchool of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, ChinaSchool of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, ChinaSchool of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, ChinaSchool of Materials Science and Engineering, Beihang University, Beijing 100191, ChinaSchool of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, ChinaThe effect of low cycle fatigue (LCF) predamage with no precracks on very high cycle fatigue (VHCF) properties, and crack initiation characteristics for TC21 titanium alloy, was investigated. The results showed that LCF predamage with less than 5% of fatigue life had little influence on fatigue limit, but reduced its fatigue life. Fatigue cracks were initiated on the surface of the specimen at high stress amplitude, whereas fatigue cracks were initiated on the subsurface of the specimens at low stress amplitude. Based on Lemaitre damage theory, a very high/low cycle combined fatigue damage model was established to analyze the fatigue damage process, which was consistent with the experimental data. It was indicated that 5% LCF predamage value was the equivalent damage value, which was close to the critical value of VHCF crack initiation. The fatigue crack initiation of the specimens with LCF predamage less than 5% took up the major components of fatigue life.https://www.mdpi.com/2073-4352/12/12/1702fatigue damageVHCFtitanium alloycombined fatigue |
| spellingShingle | Baohua Nie Shuai Liu Yue Wu Yu Song Haiying Qi Binqing Shi Zihua Zhao Dongchu Chen Cumulative Damage in Very High/Low Cycle Combined Fatigue for TC21 Titanium Alloy Crystals fatigue damage VHCF titanium alloy combined fatigue |
| title | Cumulative Damage in Very High/Low Cycle Combined Fatigue for TC21 Titanium Alloy |
| title_full | Cumulative Damage in Very High/Low Cycle Combined Fatigue for TC21 Titanium Alloy |
| title_fullStr | Cumulative Damage in Very High/Low Cycle Combined Fatigue for TC21 Titanium Alloy |
| title_full_unstemmed | Cumulative Damage in Very High/Low Cycle Combined Fatigue for TC21 Titanium Alloy |
| title_short | Cumulative Damage in Very High/Low Cycle Combined Fatigue for TC21 Titanium Alloy |
| title_sort | cumulative damage in very high low cycle combined fatigue for tc21 titanium alloy |
| topic | fatigue damage VHCF titanium alloy combined fatigue |
| url | https://www.mdpi.com/2073-4352/12/12/1702 |
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