| 时效态Mg-Gd-Y-Zr镁合金压缩性能和组织演变 |
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| 引用本文： | 陈长江,王渠东,尹冬弟,丁文江.时效态Mg-Gd-Y-Zr镁合金压缩性能和组织演变[J].铸造,2010,59(3). |
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| 作者姓名： | 陈长江 王渠东 尹冬弟 丁文江 |
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| 作者单位： | 1. 上海交通大学轻合金精密成型国家工程研究中心,上海,200240
2. 上海交通大学轻合金精密成型国家工程研究中心,上海,200240;上海交通大学金属基复合材料国家重点实验室,上海,200240 |
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| 摘 要： | 采用Gleeble-3500热模拟机对时效态Mg-10Gd-3Y-0.5zr (GW103)和Mg-12Gd-3Y-0.5Zr(GW123)稀土镁合金在变形温度为25～350℃、应变速率为0.01 s~(-1)、最大变形程度为1的条件下进行压缩模拟试验,利用金相显微镜和扫描电镜观察组织变化.结果表明:GW103和GW123合金的室温抗压强度分别为419MPa和460MPa;150-200℃时GW123合金的抗压强度大干GW103合金;当温度高于250℃时,两种合金的抗压强度相近.分析表明250℃以下压缩时,孪生变形是影响压缩力学性能的主要因素;300～350℃压缩时,晶界和变形带处发生动态再结晶是影响压缩力学性能的主要因素.
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| 关 键 词： | Mg-Gd-Y-Zr镁合金 压缩 孪生变形 动态再结晶 |
Compressive Properties and Microstructure Evolution of Aging Mg-Gd-Y-Zr Magnesium Alloys |
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| CHEN Chang-jiang,WANG Qu-dong,YIN Dong-di,DING Wen-jiang.Compressive Properties and Microstructure Evolution of Aging Mg-Gd-Y-Zr Magnesium Alloys[J].Foundry,2010,59(3). |
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| Authors: | CHEN Chang-jiang WANG Qu-dong YIN Dong-di DING Wen-jiang |
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| Affiliation: | CHEN Chang-jiang1,WANG Qu-dong1,2,YIN Dong-di1,DING Wen-jiang1,2 (1. National Engineering Research Center for Light Alloy Net Forming,Shanghai Jiaotong University,Shanghai 200240,China,2. State Key Laboratory of Metal Matrix Composites,China) |
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| Abstract: | The compressive true stress-true strain behaviors of Mg-10Gd-3Y-0.5Zr (GW103) and Mg-12Gd-3Y-0.5Zr (GW123) Mg-RE alloys in T6 treatment were investigated on a hot-stimulation machine Gleeble 3500. The tests were carried out at a strain rate of 0.01 s~(-1) and the deformation temperatures 25-350℃ and the maximum strain of 1. The evolution of microstructure was observed with optical microscope and scanning electronic microscope. The results show that the room temperature compression strengths of GW103 and GW123 alloys are 419 MPa and 460 MPa, separately; the compression strength of GW123 alloy is bigger than that of GWl03 alloy between 150-200℃, and at above 250 ℃ the compression strengths of the two alloys are similar. Analysis shows that twinning deformation is the main factor impacts the compressive mechanical properties of both alloys below 250℃. The dynamic recrystallization which exists in the grain boundary and deformation band is the main factor that effects the compressive mechanical properties between 300-350℃. |
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| Keywords: | Mg-Gd-Y-Zr magnesium alloy compression twinning deformation dynamic recrystallization |
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