| β-Mg_(17)Al_(12)相析出形态对AZ91镁合金力学性能的影响 |
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| 引用本文： | 时惠英,陈梓山,张菊梅,蒋百灵.β-Mg_(17)Al_(12)相析出形态对AZ91镁合金力学性能的影响[J].金属热处理,2010,35(1). |
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| 作者姓名： | 时惠英 陈梓山 张菊梅 蒋百灵 |
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| 作者单位： | 西安理工大学,材料科学与工程学院,陕西,西安,710048 |
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| 基金项目： | 国家科技支撑计划(2006BAE04B05-1) |
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| 摘 要： | 采用固溶时效、退火处理以及球化处理等热处理工艺在AZ91镁合金中分别获得网状、层片状、球状和菱形状β-Mg17Al12相。利用光学显微镜、扫描电子显微镜、X射线衍射仪、透射电子显微镜以及拉伸和硬度试验等研究不同形态的β-Mg17Al12相对AZ91镁合金力学性能的影响。结果表明,网状β-Mg17Al12相恶化了AZ91镁合金的力学性能;层片状和球状β-Mg17Al12相有利于合金塑性的改善;而菱形状β-Mg17Al12相有利于合金强度的提高。
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| 关 键 词： | AZ91镁合金 β-Mg17Al12相 析出形态 力学性能 |
Effects of precipitation morphology of β-Mg_(17)Al_(12) phase on mechanical properties of AZ91 magnesium alloy |
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| SHI Hui-ying,CHEN Zi-shan,ZHANG Ju-mei,JIANG Bai-ling.Effects of precipitation morphology of β-Mg_(17)Al_(12) phase on mechanical properties of AZ91 magnesium alloy[J].Heat Treatment of Metals,2010,35(1). |
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| Authors: | SHI Hui-ying CHEN Zi-shan ZHANG Ju-mei JIANG Bai-ling |
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| Abstract: | Different morphologies of β-Mg_(17)Al_(12) phase such as net-shape,lameller-shape,spherical and rhomb-shape were obtained by solution,aging,annealing and spheroidizing.Effects of the morphologies of β-Mg_(17)Al_(12) phase during the heat treatments on mechanical properties of as-cast AZ91 magnesium alloy were studied by OM,SEM,XRD,EDS,TEM as well as tensile and hardness tests.The results show that the net-shaped β-Mg_(17)Al_(12) phase in AZ91 magnesium alloy can decrease the mechanical properties the lameller-shaped β-Mg_(17)Al_(12) phase and spherical β-Mg_(17)Al_(12) phase improve the ductility,and the rhomb-shaped β-Mg_(17)Al_(12) phase can increase the strength of the alloy. |
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| Keywords: | AZ91 magnesium alloy precipitation morphology mechanical properties |
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