Effects of Ca and Sr addition on mechanical properties of a cast AZ91 magnesium alloy at room and elevated temperature
Effects of Ca and Sr addition on mechanical properties of a cast AZ91 magnesium alloy at room and elevated temperature
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DOI：
10.1016/j.msea.2005.05.028
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发表时间：
2005-08-25
期刊：
影响因子：
6.4
通讯作者：
Higashi, K
中科院分区：
文献类型：
--
作者：
Hirai, K;Somekawa, H;Higashi, K
在铸造AZ91镁合金中添加钙和锶元素，使其具有高强度、高抗蠕变等优良的力学性能。从显微组织观察，要获得细晶AZ91镁合金，钙和锶的最佳含量分别为1.0和0.5wt%。目前研制的铸造AZ91镁合金的细晶尺寸为19微米，室温抗拉强度和延伸率分别为250 Mpa和3.5%。开发的AZ91镁合金在448K高温下的强度也大大高于贵重铸造镁合金。(C)2005 Elsevier B.V.保留所有权利。
The cast AZ91 magnesium alloy having excellent mechanical properties, such as high strength and high creep resistance was developed by additional elements of Ca and Sr. From the microstructural observations, in order to obtain the fine grained AZ91 magnesium alloys, the optimal concentration of elements, such as Ca and Sr were at least 1.0 and 0.5 wt%, respectively. The present developed cast AZ91 magnesium alloy had fine grain sizes of 19 mu m. The tensile strength and elongation at room temperature were 250 MPa and 3.5%, respectively. The strength at an elevated temperature of 448 K on developed AZ91 magnesium alloy was also drastically larger than that on precious cast magnesium alloys. (c) 2005 Elsevier B.V. All rights reserved.