| Effects of aging on the microstructures and mechanical properties of extruded AM50 ＋ xCa magnesium alloys |
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| 引用本文： | Suéry Michel.Effects of aging on the microstructures and mechanical properties of extruded AM50 ＋ xCa magnesium alloys[J].稀有金属(英文版),2006,25(4):377-381. |
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| 作者姓名： | Suéry Michel |
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| 作者单位： | Institute National Polytechnique de Grenoble (INPG) Génie Physique et Mécanique des Matériaux (GPM2) UMR CNRS 5010 ENSPG BP46 38402 Saint-Martin d'Hères Cedex France，Institute National Polytechnique de Grenoble (INPG) Génie Physique et Mécanique des Matériaux (GPM2) UMR CNRS 5010 ENSPG BP46 38402 Saint-Martin d'Hères Cedex France |
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| 基金项目： | [This work was financially supported by the International Cooperation Foundation of Shanghai Science and Technology Committee of China （No. 02SL002） and the Regional Council of Rhone-A lpes of France. ] |
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| 摘 要： | The effects of aging treatment on the microstructures and mechanical properties of extruded AM50 ＋ xCa alloys （x=0, 1, 2 wt.%） were studied. The results indicated the secondary phase Mgl7Al12 precipitated from the saturated α-Mg solid solution while Al2Ca changed slightly when the aging time was increased. The hardness of extruded AM50 ＋ xCa al- loys increased initially to its peak, and then dropped to reach its original hardness with the increase in aging time. With the increase in aging temperature, the hardness of the AM50 ＋ 2Ca ahoy decreased, whereas the hardness of AM50 and AM50 ＋ 1Ca alloys decreased in the initial stages of aging treatment and increased in the later stages of aging treatment. The tensile strengths of AM50 and AM50 ＋ 1Ca alloys increased after aging treatment for the precipitation of Mg17Al12 phase, which increases the resistance against dislocation movement at the grain boundary; with increase in aging temperature, their tensile strengths increased. For AM50 ＋ 2Ca alloy, the tensile strength declined after aging at 150℃ and 175℃, while it increased slightly at 200℃. The ductility of AM50 ＋ xCa alloys （x = 0, 1, 2 wt.%） declined after aging treatment.
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| 关 键 词： | AM50 ＋ xCa合金 老化 挤出 机械性质 显微结构 |
| 收稿时间： | 2005-07-26 |
Effects of aging on the microstructures and mechanical properties of extruded AM50 + xCa magnesium alloys |
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| WANG Qudong,PENG Jianguo,Suéry Michel,Jean-Jacques Blandin.Effects of aging on the microstructures and mechanical properties of extruded AM50 + xCa magnesium alloys[J].Rare Metals,2006,25(4):377-381. |
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| Authors: | WANG Qudong PENG Jianguo Suéry Michel Jean-Jacques Blandin |
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| Affiliation: | 1. National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China;2. Hitachi (China) Research & Development Corporation, Rui Jin Building, No.205 Maoming Road(S), Shanghai 200020, China;3. The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China |
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| Abstract: | The effects of aging treatment on the microstructures and mechanical properties of extruded AM50 + xCa alloys (x = 0, 1, 2 wt.%) were studied. The results indicated the secondary phase Mg17Al12 precipitated from the saturated α-Mg solid solution while Al2Ca changed slightly when the aging time was increased. The hardness of extruded AM50 + xCa alloys increased initially to its peak, and then dropped to reach its original hardness with the increase in aging time. With the increase in aging temperature, the hardness of the AM50 + 2Ca alloy decreased, whereas the hardness of AM50 and AM50 + 1Ca alloys decreased in the initial stages of aging treatment and increased in the later stages of aging treatment. The tensile strengths of AM50 and AM50 + 1Ca alloys increased after aging treatment for the precipitation of Mg17Al12 phase, which increases the resistance against dislocation movement at the grain boundary; with increase in aging temperature, their tensile strengths increased. For AM50 + 2Ca alloy, the tensile strength declined after aging at 150℃ and 175℃, while it increased slightly at 200℃. The ductility of AM50 + xCa alloys (x = 0, 1, 2 wt.%) declined after aging treatment. |
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| Keywords: | AM50 xCa alloys aging extrusion mechanical properties |
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