Experimental Investigation of the Mechanical Behavior of Corroded Q345 and Q420 Structural Steels
This study investigated the residual mechanical behavior of Q345 and Q420 structural steels after corrosion. Firstly, the tensile specimens were corroded in an acid solution until the weight loss rate reached 20%, 30%, and 40%. The corroded specimens were then subjected to axial tensile experiments...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/2/475 |
| _version_ | 1827758175510593536 |
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| author | Nan Zhao Chuntao Zhang |
| author_facet | Nan Zhao Chuntao Zhang |
| author_sort | Nan Zhao |
| collection | DOAJ |
| description | This study investigated the residual mechanical behavior of Q345 and Q420 structural steels after corrosion. Firstly, the tensile specimens were corroded in an acid solution until the weight loss rate reached 20%, 30%, and 40%. The corroded specimens were then subjected to axial tensile experiments to observe the tensile fracture behavior and obtain the engineering stress–strain curves. The effects of corrosion on stress–strain curves, failure modes, tensile strength, and ductility were analyzed and discussed. The strength and ductility of Q345 and Q420 structural steel dropped sharply after corrosion. In addition, a constitutive model of Q345 and Q420 structural steels with different mass loss rates was established. Based on the test data, empirical equations were proposed to predict the residual strength and ductility of corroded Q345 and Q420 structural steels. |
| first_indexed | 2024-03-11T09:02:58Z |
| format | Article |
| id | doaj.art-622d9aa280614c2aa85fd6f6f042d2cf |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-11T09:02:58Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-622d9aa280614c2aa85fd6f6f042d2cf2023-11-16T19:33:13ZengMDPI AGBuildings2075-53092023-02-0113247510.3390/buildings13020475Experimental Investigation of the Mechanical Behavior of Corroded Q345 and Q420 Structural SteelsNan Zhao0Chuntao Zhang1China Construction Science and Industry Corporation Ltd., Chongqing 400000, ChinaSchool of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, ChinaThis study investigated the residual mechanical behavior of Q345 and Q420 structural steels after corrosion. Firstly, the tensile specimens were corroded in an acid solution until the weight loss rate reached 20%, 30%, and 40%. The corroded specimens were then subjected to axial tensile experiments to observe the tensile fracture behavior and obtain the engineering stress–strain curves. The effects of corrosion on stress–strain curves, failure modes, tensile strength, and ductility were analyzed and discussed. The strength and ductility of Q345 and Q420 structural steel dropped sharply after corrosion. In addition, a constitutive model of Q345 and Q420 structural steels with different mass loss rates was established. Based on the test data, empirical equations were proposed to predict the residual strength and ductility of corroded Q345 and Q420 structural steels.https://www.mdpi.com/2075-5309/13/2/475mechanical behaviorcorrosionstructural steelsweight loss rateconstitutive model |
| spellingShingle | Nan Zhao Chuntao Zhang Experimental Investigation of the Mechanical Behavior of Corroded Q345 and Q420 Structural Steels Buildings mechanical behavior corrosion structural steels weight loss rate constitutive model |
| title | Experimental Investigation of the Mechanical Behavior of Corroded Q345 and Q420 Structural Steels |
| title_full | Experimental Investigation of the Mechanical Behavior of Corroded Q345 and Q420 Structural Steels |
| title_fullStr | Experimental Investigation of the Mechanical Behavior of Corroded Q345 and Q420 Structural Steels |
| title_full_unstemmed | Experimental Investigation of the Mechanical Behavior of Corroded Q345 and Q420 Structural Steels |
| title_short | Experimental Investigation of the Mechanical Behavior of Corroded Q345 and Q420 Structural Steels |
| title_sort | experimental investigation of the mechanical behavior of corroded q345 and q420 structural steels |
| topic | mechanical behavior corrosion structural steels weight loss rate constitutive model |
| url | https://www.mdpi.com/2075-5309/13/2/475 |
| work_keys_str_mv | AT nanzhao experimentalinvestigationofthemechanicalbehaviorofcorrodedq345andq420structuralsteels AT chuntaozhang experimentalinvestigationofthemechanicalbehaviorofcorrodedq345andq420structuralsteels |