Clarifying stress corrosion cracking behavior of biomedical Mg-Gd-Zn-Zr alloy
Implants are inevitably subjected to stress corrosion, bringing serious challenges to the controlled degradation of biomedical Mg alloys. It is worth studying the stress corrosion cracking (SCC) behavior of Mg alloy and exploring Mg alloy with good SCC resistance for wide biomedical applications. In...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2025-07-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956724002676 |
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| author | Qiangsheng Dong Jiahao Jiang Jinghuai Zhang Zhi Hu Xiaobo Zhang |
| author_facet | Qiangsheng Dong Jiahao Jiang Jinghuai Zhang Zhi Hu Xiaobo Zhang |
| author_sort | Qiangsheng Dong |
| collection | DOAJ |
| description | Implants are inevitably subjected to stress corrosion, bringing serious challenges to the controlled degradation of biomedical Mg alloys. It is worth studying the stress corrosion cracking (SCC) behavior of Mg alloy and exploring Mg alloy with good SCC resistance for wide biomedical applications. In this work, the as-cast and as-extruded Mg-3Gd-1Zn-0.4Zr (GZ31K) alloys with uniform corrosion were used to investigate SCC behavior. The as-extruded GZ31K alloy exhibited better corrosion resistance and mechanical properties than the as-cast one mainly owing to grain refinement and uniformly distributed fine precipitates, and possessed superior SCC resistance. To clarify the SCC mechanism, the slow strain rate tests were assisted with applied constant potentials via an electrochemical workstation. Accelerated anodic dissolution at anodic polarization deteriorated SCC resistance due to the initiation of corrosion pits and micro-cracks. However, cathodic polarization had no obvious effects on SCC resistance, along with both retarded corrosion and accelerated hydrogen evolution. Stacking faults in GZ31K alloy were hydrogen capture containers to reduce the effect of hydrogen on SCC resistance during cathodic polarization. These findings provide new insights into the evaluation of SCC mechanism, and offer more opportunities to explore Mg alloys with good SCC resistance by regulating anodic dissolution. |
| format | Article |
| id | doaj-art-604443cf708a47fca4df2be6527af84c |
| institution | Kabale University |
| issn | 2213-9567 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-604443cf708a47fca4df2be6527af84c2025-08-20T03:36:39ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672025-07-011373450346510.1016/j.jma.2024.07.023Clarifying stress corrosion cracking behavior of biomedical Mg-Gd-Zn-Zr alloyQiangsheng Dong0Jiahao Jiang1Jinghuai Zhang2Zhi Hu3Xiaobo Zhang4Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China; Jiangsu Key Laboratory for Light Metal Alloys, Baowu Magnesium Technology Co. LTD, Nanjing 211211, ChinaJiangsu Key Laboratory of Advanced Structural Materials and Application Technology, School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, ChinaKey Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China; Corresponding authors.School of Advanced Manufacturing, Nanchang University, Nanchang 330031, China; Corresponding authors.Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China; Corresponding authors.Implants are inevitably subjected to stress corrosion, bringing serious challenges to the controlled degradation of biomedical Mg alloys. It is worth studying the stress corrosion cracking (SCC) behavior of Mg alloy and exploring Mg alloy with good SCC resistance for wide biomedical applications. In this work, the as-cast and as-extruded Mg-3Gd-1Zn-0.4Zr (GZ31K) alloys with uniform corrosion were used to investigate SCC behavior. The as-extruded GZ31K alloy exhibited better corrosion resistance and mechanical properties than the as-cast one mainly owing to grain refinement and uniformly distributed fine precipitates, and possessed superior SCC resistance. To clarify the SCC mechanism, the slow strain rate tests were assisted with applied constant potentials via an electrochemical workstation. Accelerated anodic dissolution at anodic polarization deteriorated SCC resistance due to the initiation of corrosion pits and micro-cracks. However, cathodic polarization had no obvious effects on SCC resistance, along with both retarded corrosion and accelerated hydrogen evolution. Stacking faults in GZ31K alloy were hydrogen capture containers to reduce the effect of hydrogen on SCC resistance during cathodic polarization. These findings provide new insights into the evaluation of SCC mechanism, and offer more opportunities to explore Mg alloys with good SCC resistance by regulating anodic dissolution.http://www.sciencedirect.com/science/article/pii/S2213956724002676Mg-Gd-Zn-Zr alloyCorrosion resistanceStress corrosion crackingAnodic dissolutionBiomaterial |
| spellingShingle | Qiangsheng Dong Jiahao Jiang Jinghuai Zhang Zhi Hu Xiaobo Zhang Clarifying stress corrosion cracking behavior of biomedical Mg-Gd-Zn-Zr alloy Journal of Magnesium and Alloys Mg-Gd-Zn-Zr alloy Corrosion resistance Stress corrosion cracking Anodic dissolution Biomaterial |
| title | Clarifying stress corrosion cracking behavior of biomedical Mg-Gd-Zn-Zr alloy |
| title_full | Clarifying stress corrosion cracking behavior of biomedical Mg-Gd-Zn-Zr alloy |
| title_fullStr | Clarifying stress corrosion cracking behavior of biomedical Mg-Gd-Zn-Zr alloy |
| title_full_unstemmed | Clarifying stress corrosion cracking behavior of biomedical Mg-Gd-Zn-Zr alloy |
| title_short | Clarifying stress corrosion cracking behavior of biomedical Mg-Gd-Zn-Zr alloy |
| title_sort | clarifying stress corrosion cracking behavior of biomedical mg gd zn zr alloy |
| topic | Mg-Gd-Zn-Zr alloy Corrosion resistance Stress corrosion cracking Anodic dissolution Biomaterial |
| url | http://www.sciencedirect.com/science/article/pii/S2213956724002676 |
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