Effects of Mg and Ag Contents on Intergranular Corrosion Property of Al-Cu-Mg-Ag New Heat-resistant Al Alloy
The effects of Mg and Ag contents on the corrosion resistance of Al-Cu-Mg-Ag alloy were investigated by intergranular corrosion (IGC) testing. The corrosion mechanism of the alloys with different chemical composition was discussed by transmission electron microscopy (TEM) and electrochemical analyse...
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2016-09-01
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| Series: | Cailiao gongcheng |
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| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.09.011 |
| _version_ | 1797967029083308032 |
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| author | LIU Xiao-yan WANG Zhao-peng LONG Liang ZHANG Xi-liang CUI Hao-xuan GAO Fei |
| author_facet | LIU Xiao-yan WANG Zhao-peng LONG Liang ZHANG Xi-liang CUI Hao-xuan GAO Fei |
| author_sort | LIU Xiao-yan |
| collection | DOAJ |
| description | The effects of Mg and Ag contents on the corrosion resistance of Al-Cu-Mg-Ag alloy were investigated by intergranular corrosion (IGC) testing. The corrosion mechanism of the alloys with different chemical composition was discussed by transmission electron microscopy (TEM) and electrochemical analyses. The results indicate with increasing Mg and Ag content, the age hardening rate of the alloy increases. The size of the strengthening phases Ω decreases with increasing Mg content whereas phase volume fraction increases. More solution atoms are consumed to form the precipitation on the grain boundaries of the alloy with higher Mg content, which increases the potential difference between precipitation free zone (PFZ) and the matrix and subsequently, the IGC resistance of Al-Cu-Mg-Ag alloy decreases. Increasing the Ag content, the main strengthening phases transform from great amounts of <i>θ</i>' with less Ω to plentiful Ω with less <i>θ</i>'. The variation of Ag content hardly affects the potential of PFZ, and the corrosion resistance of the alloy depends mainly on the width of PFZ. With increasing Ag content, the precipitations on the grain boundaries are refined; the width of PFZ decreases and correspondingly, the corrosion passageway becomes narrow. The IGC resistance of Al-Cu-Mg-Ag alloy is enhanced with increasing Ag content. |
| first_indexed | 2024-04-11T02:24:40Z |
| format | Article |
| id | doaj.art-505a9b6ac10840aa9fae1057bbc03fa4 |
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| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T02:24:40Z |
| publishDate | 2016-09-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-505a9b6ac10840aa9fae1057bbc03fa42023-01-02T22:55:37ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812016-09-01449687510.11868/j.issn.1001-4381.2016.09.01120160911Effects of Mg and Ag Contents on Intergranular Corrosion Property of Al-Cu-Mg-Ag New Heat-resistant Al AlloyLIU Xiao-yan0WANG Zhao-peng1LONG Liang2ZHANG Xi-liang3CUI Hao-xuan4GAO Fei5Equipment Manufacturing College, Hebei University of Engineering, Handan 056038, Hebei, ChinaEquipment Manufacturing College, Hebei University of Engineering, Handan 056038, Hebei, ChinaEquipment Manufacturing College, Hebei University of Engineering, Handan 056038, Hebei, ChinaEquipment Manufacturing College, Hebei University of Engineering, Handan 056038, Hebei, ChinaEquipment Manufacturing College, Hebei University of Engineering, Handan 056038, Hebei, ChinaEquipment Manufacturing College, Hebei University of Engineering, Handan 056038, Hebei, ChinaThe effects of Mg and Ag contents on the corrosion resistance of Al-Cu-Mg-Ag alloy were investigated by intergranular corrosion (IGC) testing. The corrosion mechanism of the alloys with different chemical composition was discussed by transmission electron microscopy (TEM) and electrochemical analyses. The results indicate with increasing Mg and Ag content, the age hardening rate of the alloy increases. The size of the strengthening phases Ω decreases with increasing Mg content whereas phase volume fraction increases. More solution atoms are consumed to form the precipitation on the grain boundaries of the alloy with higher Mg content, which increases the potential difference between precipitation free zone (PFZ) and the matrix and subsequently, the IGC resistance of Al-Cu-Mg-Ag alloy decreases. Increasing the Ag content, the main strengthening phases transform from great amounts of <i>θ</i>' with less Ω to plentiful Ω with less <i>θ</i>'. The variation of Ag content hardly affects the potential of PFZ, and the corrosion resistance of the alloy depends mainly on the width of PFZ. With increasing Ag content, the precipitations on the grain boundaries are refined; the width of PFZ decreases and correspondingly, the corrosion passageway becomes narrow. The IGC resistance of Al-Cu-Mg-Ag alloy is enhanced with increasing Ag content.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.09.011Mg contentAg contentAl-Cu-Mg-Agintergranular corrosionprecipitation free zone |
| spellingShingle | LIU Xiao-yan WANG Zhao-peng LONG Liang ZHANG Xi-liang CUI Hao-xuan GAO Fei Effects of Mg and Ag Contents on Intergranular Corrosion Property of Al-Cu-Mg-Ag New Heat-resistant Al Alloy Cailiao gongcheng Mg content Ag content Al-Cu-Mg-Ag intergranular corrosion precipitation free zone |
| title | Effects of Mg and Ag Contents on Intergranular Corrosion Property of Al-Cu-Mg-Ag New Heat-resistant Al Alloy |
| title_full | Effects of Mg and Ag Contents on Intergranular Corrosion Property of Al-Cu-Mg-Ag New Heat-resistant Al Alloy |
| title_fullStr | Effects of Mg and Ag Contents on Intergranular Corrosion Property of Al-Cu-Mg-Ag New Heat-resistant Al Alloy |
| title_full_unstemmed | Effects of Mg and Ag Contents on Intergranular Corrosion Property of Al-Cu-Mg-Ag New Heat-resistant Al Alloy |
| title_short | Effects of Mg and Ag Contents on Intergranular Corrosion Property of Al-Cu-Mg-Ag New Heat-resistant Al Alloy |
| title_sort | effects of mg and ag contents on intergranular corrosion property of al cu mg ag new heat resistant al alloy |
| topic | Mg content Ag content Al-Cu-Mg-Ag intergranular corrosion precipitation free zone |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.09.011 |
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