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| Effect of Mn alloying process on microstructure and thermal fatigue properties of ZA33 alloy |
| Received:July 28, 2014 Revised:August 19, 2014 |
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| DOI： |
| KeyWord:ZA33;Mn alloying process;microstructure;mechanical properties;thermal fatigue properties |
| Author | Institution |
| ZHAO Bing |
江苏大学材料科学与工程学院 江苏镇江 |
| SI Nai-chao |
江苏大学材料科学与工程学院 江苏镇江 |
| LIU Guang-lei |
江苏大学材料科学与工程学院 江苏镇江 |
| XU Liang |
江苏大学材料科学与工程学院 江苏镇江 |
| WU Yong-yong |
江苏大学材料科学与工程学院 江苏镇江 |
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| Abstract: |
| Effect of Mn alloying process on microstructure, mechanical and thermal fatigue properties of ZA33 alloy were studied in this paper. Microstructure and thermal fatigue cracks of the alloy were observed by OM. The results show that the grains of ZA33 alloy are refined effectively after the adding of 0.6% Mn and thermal fatigue properties are also improved. With the increasing adding amount of Mn, tensile strength first increase and then decrease, and hardness is slightly increased,while the elongation is slightly reduced,The best strength and plasticity coordination is obtained when the Mn content is 0.6%, the mechanical properties are optimal and micro-cracks of the alloy are shortest, which presents the best thermal fatigue properties. When the Mn content is greater than 0.6%, the Mn-rich phases will gather and grow up in the grain boundaries, which produce stress concentration and then deteriorate the thermal fatigue performance. |
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