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| Effects of Pulse Current on Cast Structure of 7075 Aluminum Alloy |
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Received:January 22, 2013
Revised:January 24, 2013
Accepted:January 25, 2013
Published Online:July 18, 2013
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| DOI：10.3969/j.issn.1007-7545.2013.08.013 |
| KeyWord:pulse current; modification; 7075 aluminum alloy; Al-5Ti-B; as-cast microstructure |
| Author | Institution |
| Liang Yu |
贵州大学材料与冶金学院 |
| Sun Zhongyuan |
贵州大学材料与冶金学院 |
| Yu Lingfeng |
贵州大学材料与冶金学院 |
| Shi Zhiyi |
贵州大学材料与冶金学院 |
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| Abstract: |
| The modification and mechanisms of pulse current and Al-5Ti-B modificator on as-cast structure of 7075 aluminum alloy were studied. The results show that pulse current and Al-5Ti-B modificator can inhibit grow of secondary dendritic crystal of solidification structure, from growing, improve as-cast structure, and achieve equiaxial and spherical grains of matrix. The segregation of alloying elements of copper and iron in alloy is modified compared with directly cast samples. |
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