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| Effect of Manganese on Microstructures and Thermal Fatigue Properties of Zn-38Al-2.2Cu Casting Alloy |
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Received:May 05, 2013
Revised:May 06, 2013
Accepted:May 07, 2013
Published Online:October 25, 2013
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| DOI：10.3969/j.issn.1007-7545.2013.11.017 |
| KeyWord:Zn-38Al-2.2Cu alloy; thermal fatigue; microstructures; solution strengthening; grain boundaries |
| Author | Institution |
| XU Liang |
江苏大学材料科学与工程学院 |
| SI Nai-chao |
江苏大学材料科学与工程学院 |
| LIU Guang-lei |
江苏大学材料科学与工程学院 |
| XU Chao |
江苏大学材料科学与工程学院 |
| YIN Fu-xiao |
江苏大学材料学院 |
| WAN Hao |
江苏大学材料学院 |
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| Abstract: |
| The effect of adding manganese element in Zn-38Al-2.2Cu alloy on its mechanical properties and microstructures was investigated. The results show that with 0.6% addition of manganese element in Zn-38Al-2.2Cu alloy solution, part of manganese dissolves into matrix to enhance matrix, resulting in an obvious improvement of microstructures, thermal stability and thermal fatigue properties obviously. Heat resistance of the alloy is improved by high dispersity and thermal stability Mn-rich phases which is precipitated in matrix, and, the weak link of alloy grain boundary is avoided. Crack propagation and extension can be restrained by uniformly distributed Mn-rich phase with moderate size. On the contrary, bulky Mn-rich phase in continuous distribution facilitates propagation of crack. |
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