The Evolution of Fretting Wear Behavior and Damage Mechanism in Alloy 690TT with Cycle Number
The evolution of fretting wear behavior and damage mechanism in Alloy 690TT with cycle number was investigated via laser scanning confocal microscopy (LSCM), scanning electron microscopy (SEM), focus ion beam (FIB), and transmission electron microscopy (TEM). The results showed that the fretting run...
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| Format: | Article |
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MDPI AG
2020-05-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/10/2417 |
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| author | Long Xin Yongming Han Ligong Ling Weidong Zhang Yonghao Lu Tetsuo Shoji |
| author_facet | Long Xin Yongming Han Ligong Ling Weidong Zhang Yonghao Lu Tetsuo Shoji |
| author_sort | Long Xin |
| collection | DOAJ |
| description | The evolution of fretting wear behavior and damage mechanism in Alloy 690TT with cycle number was investigated via laser scanning confocal microscopy (LSCM), scanning electron microscopy (SEM), focus ion beam (FIB), and transmission electron microscopy (TEM). The results showed that the fretting running status underwent a transition from partial slip and mixed stick-slip to final gross slip with the transformation of Ft–D curves from the ellipse to the parallelogram. The coefficient of friction (COF) experienced three drops throughout the fretting process, which indicated the transformation from high-friction wear to low-friction wear. The first drop was due to the transition from two-body to three-body contact. The second and third drops were mainly related to the evolution of the glaze layer from a localized distribution to completely covering the whole contact surface. The competition between fretting induced fatigue cracking (FIF) and fretting induced wear (FIW) ran through the entire fretting wear process. Before the 1.2 × 10<sup>4</sup>th cycle, the fatigue crack growth was faster than wear, and FIF won the competition. As the fretting cycle continued to increase, the wear velocity was obviously faster than that of FIF, which indicated that FIW defeated FIF. The tribologically transformed structure (TTS) participated in the competition between FIF and FIW. The gain boundaries and dislocations in the TTS were a suitable pathway for crack initiation and propagation and oxygen permeation. |
| first_indexed | 2024-03-10T19:37:05Z |
| format | Article |
| id | doaj.art-df8aa867c0e04646b1592b0a28ae6ec7 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T19:37:05Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-df8aa867c0e04646b1592b0a28ae6ec72023-11-20T01:39:27ZengMDPI AGMaterials1996-19442020-05-011310241710.3390/ma13102417The Evolution of Fretting Wear Behavior and Damage Mechanism in Alloy 690TT with Cycle NumberLong Xin0Yongming Han1Ligong Ling2Weidong Zhang3Yonghao Lu4Tetsuo Shoji5National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, ChinaNational Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, ChinaNational Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, ChinaNational Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, ChinaNational Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, ChinaNational Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, ChinaThe evolution of fretting wear behavior and damage mechanism in Alloy 690TT with cycle number was investigated via laser scanning confocal microscopy (LSCM), scanning electron microscopy (SEM), focus ion beam (FIB), and transmission electron microscopy (TEM). The results showed that the fretting running status underwent a transition from partial slip and mixed stick-slip to final gross slip with the transformation of Ft–D curves from the ellipse to the parallelogram. The coefficient of friction (COF) experienced three drops throughout the fretting process, which indicated the transformation from high-friction wear to low-friction wear. The first drop was due to the transition from two-body to three-body contact. The second and third drops were mainly related to the evolution of the glaze layer from a localized distribution to completely covering the whole contact surface. The competition between fretting induced fatigue cracking (FIF) and fretting induced wear (FIW) ran through the entire fretting wear process. Before the 1.2 × 10<sup>4</sup>th cycle, the fatigue crack growth was faster than wear, and FIF won the competition. As the fretting cycle continued to increase, the wear velocity was obviously faster than that of FIF, which indicated that FIW defeated FIF. The tribologically transformed structure (TTS) participated in the competition between FIF and FIW. The gain boundaries and dislocations in the TTS were a suitable pathway for crack initiation and propagation and oxygen permeation.https://www.mdpi.com/1996-1944/13/10/2417fretting running statusfretting induced fatiguefretting induced wearAlloy 690TTglaze layerTTS |
| spellingShingle | Long Xin Yongming Han Ligong Ling Weidong Zhang Yonghao Lu Tetsuo Shoji The Evolution of Fretting Wear Behavior and Damage Mechanism in Alloy 690TT with Cycle Number Materials fretting running status fretting induced fatigue fretting induced wear Alloy 690TT glaze layer TTS |
| title | The Evolution of Fretting Wear Behavior and Damage Mechanism in Alloy 690TT with Cycle Number |
| title_full | The Evolution of Fretting Wear Behavior and Damage Mechanism in Alloy 690TT with Cycle Number |
| title_fullStr | The Evolution of Fretting Wear Behavior and Damage Mechanism in Alloy 690TT with Cycle Number |
| title_full_unstemmed | The Evolution of Fretting Wear Behavior and Damage Mechanism in Alloy 690TT with Cycle Number |
| title_short | The Evolution of Fretting Wear Behavior and Damage Mechanism in Alloy 690TT with Cycle Number |
| title_sort | evolution of fretting wear behavior and damage mechanism in alloy 690tt with cycle number |
| topic | fretting running status fretting induced fatigue fretting induced wear Alloy 690TT glaze layer TTS |
| url | https://www.mdpi.com/1996-1944/13/10/2417 |
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