英语翻译摘 要镁合金是最轻的工程结构材料,具有密度低、比强度和比刚度高等特点,被广泛应用于汽车、电子等领域,要扩大镁合金的应用范围,提高其力学性能是十分重要的一项十分关键因

英语翻译摘 要镁合金是最轻的工程结构材料,具有密度低、比强度和比刚度高等特点,被广泛应用于汽车、电子等领域,要扩大镁合金的应用范围,提高其力学性能是十分重要的一项十分关键因
英语翻译
摘 要
镁合金是最轻的工程结构材料,具有密度低、比强度和比刚度高等特点,被广泛应用于汽车、电子等领域,要扩大镁合金的应用范围,提高其力学性能是十分重要的一项十分关键因素.有研究表明,当AZ91中加入0.4%Ca、0.3%Sr时,可有效细化晶粒,从而提高其力学性能.本课题选用AZ91-0.4%Ca-0.3%Sr为基础材料,研究了合金元素 Gd、Y的单独添加对AZ91D-0.4%Ca-0.3%Sr镁合金组织的影响及T4和T6处理下的影响.通过拉伸试验和布氏硬度测试 ,测试不同条件下镁合金的硬度和抗拉强度,并利用光学电子显微镜观察了材料在不同状态下的显微组织特征.结果表明：Gd、Y在一定范围内的添加均能细化铸态AZ91D-0.4%Ca-0.3%Sr镁合金的晶粒,提高合金的硬度和抗拉强度,且Gd含量为3%时综合力学性能得到最优值.对添加了稀土元素后的合金进行T4和T6处理可以提高合金的抗拉强度及硬度.
关键词：AZ91D镁合金；固溶时效；显微组织；抗拉强度
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英语翻译摘 要镁合金是最轻的工程结构材料,具有密度低、比强度和比刚度高等特点,被广泛应用于汽车、电子等领域,要扩大镁合金的应用范围,提高其力学性能是十分重要的一项十分关键因
Magnesium alloys are the lightest structural engineering materials, which have many properties such as low density, high strength and stiffness. The alloys are widely used in automotive, electronics and other fields. To expand the application of magnesium alloy, improve its mechanical properties is an important factor. Studies show that the addition of 0.4% Ca, 0.3% Sr to AZ91 can effectively refine the grains and improve the mechanical properties In this paper, AZ91-0.4% Ca-0.3% Sr was chosen as the base material. The effects of separate addition of Gd, Y, and heat treatments of T4 on AZ91D-0.4% Ca-0.3% Sr alloy was investigated.
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Abstract
Magnesium is the lightest structural materials engineering, with a low density, high specific strength and specific stiffness, are widely used in automotive, electronics and other fields...

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Abstract
Magnesium is the lightest structural materials engineering, with a low density, high specific strength and specific stiffness, are widely used in automotive, electronics and other fields, to expand the scope of application of magnesium alloy to improve its mechanical properties is a very important one critical factor. Studies have shown that when added to AZ91 0.4% Ca, 0.3% Sr, can effectively refine the grain to improve its mechanical properties. The topic chosen AZ91-0.4% Ca-0.3% Sr-based materials, the alloying elements Gd, Y separate add AZ91D-0.4% Ca-0.3% Sr alloy of magnesium and the T4 and T6 treatments effects. Brinell hardness tests and by tensile tests under different conditions, the hardness and tensile strength of magnesium alloy, and observed by optical electron microscopy in the different states of the material microstructure characteristics. The results showed that: Gd, Y in a certain range of added refinement can cast AZ91D-0.4% Ca-0.3% Sr alloy of grain and improve the hardness and tensile strength, and the Gd content is 3% of consolidated optimum mechanical properties. Of rare earth elements added to the T4 and T6 alloy processing can improve the tensile strength and hardness.
Key words: AZ91D magnesium alloy; solution and aging; microstructure; tensile strength
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