Experimental Investigation of Fatigue Crack Growth Behavior in Banded Structure of Pipeline Steel
The effect of a ferrite/mixed phase banded structure on the fatigue crack growth behavior of pipeline steel has been investigated in this work. Constant stress-controlled fatigue tests were carried out on unilateral notch specimens in the longitudinal direction (LD) and the transverse direction (TD)...
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| Format: | Article |
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MDPI AG
2020-09-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/9/1193 |
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| author | Nan Zhan Zhengxing Hu Xiaochuan Zhang |
| author_facet | Nan Zhan Zhengxing Hu Xiaochuan Zhang |
| author_sort | Nan Zhan |
| collection | DOAJ |
| description | The effect of a ferrite/mixed phase banded structure on the fatigue crack growth behavior of pipeline steel has been investigated in this work. Constant stress-controlled fatigue tests were carried out on unilateral notch specimens in the longitudinal direction (LD) and the transverse direction (TD). The strain accumulation was measured by digital image correlation (DIC) method and the fatigue fracture morphology was analyzed. The results show that the banded structure in the LD would cause a wide range of crack deflections, especially in the early stage of fatigue crack growth, which results in a lower fatigue crack growth rate compared to the TD. At the later stage, due to the increase of the plastic zone of the crack tip, more ferrite in the crack growth path of the TD specimen is also beneficial for crack tip blunting, thereby slowing down the increase of the crack growth rate. |
| first_indexed | 2024-03-10T16:32:10Z |
| format | Article |
| id | doaj.art-b7a976f884514aa4b4ab620b456b02b8 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T16:32:10Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-b7a976f884514aa4b4ab620b456b02b82023-11-20T12:47:13ZengMDPI AGMetals2075-47012020-09-01109119310.3390/met10091193Experimental Investigation of Fatigue Crack Growth Behavior in Banded Structure of Pipeline SteelNan Zhan0Zhengxing Hu1Xiaochuan Zhang2Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin 300384, ChinaDepartment of Mechanics, Tianjin University, Tianjin 300072, ChinaSchool of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, ChinaThe effect of a ferrite/mixed phase banded structure on the fatigue crack growth behavior of pipeline steel has been investigated in this work. Constant stress-controlled fatigue tests were carried out on unilateral notch specimens in the longitudinal direction (LD) and the transverse direction (TD). The strain accumulation was measured by digital image correlation (DIC) method and the fatigue fracture morphology was analyzed. The results show that the banded structure in the LD would cause a wide range of crack deflections, especially in the early stage of fatigue crack growth, which results in a lower fatigue crack growth rate compared to the TD. At the later stage, due to the increase of the plastic zone of the crack tip, more ferrite in the crack growth path of the TD specimen is also beneficial for crack tip blunting, thereby slowing down the increase of the crack growth rate.https://www.mdpi.com/2075-4701/10/9/1193pipeline steelfatigue crack growthdigital image correlation (DIC)banded structure |
| spellingShingle | Nan Zhan Zhengxing Hu Xiaochuan Zhang Experimental Investigation of Fatigue Crack Growth Behavior in Banded Structure of Pipeline Steel Metals pipeline steel fatigue crack growth digital image correlation (DIC) banded structure |
| title | Experimental Investigation of Fatigue Crack Growth Behavior in Banded Structure of Pipeline Steel |
| title_full | Experimental Investigation of Fatigue Crack Growth Behavior in Banded Structure of Pipeline Steel |
| title_fullStr | Experimental Investigation of Fatigue Crack Growth Behavior in Banded Structure of Pipeline Steel |
| title_full_unstemmed | Experimental Investigation of Fatigue Crack Growth Behavior in Banded Structure of Pipeline Steel |
| title_short | Experimental Investigation of Fatigue Crack Growth Behavior in Banded Structure of Pipeline Steel |
| title_sort | experimental investigation of fatigue crack growth behavior in banded structure of pipeline steel |
| topic | pipeline steel fatigue crack growth digital image correlation (DIC) banded structure |
| url | https://www.mdpi.com/2075-4701/10/9/1193 |
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