Microstructure and mechanical properties of Mg–5Sn alloy fabricated by a centrifugal casting method
Microstructure and mechanical properties of Mg–5Sn alloy fabricated by a centrifugal casting method
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DOI：
10.1016/j.matlet.2013.10.092
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发表时间：
2014-02
影响因子：
3
通讯作者：
D. Luo;Huiyuan Wang;Zi-Teng Ou-Yang;Lei Chen;Jin–guo Wang;Q. Jiang
中科院分区：
文献类型：
--
作者：
D. Luo;Huiyuan Wang;Zi-Teng Ou-Yang;Lei Chen;Jin–guo Wang;Q. Jiang
采用水平离心铸造法制备了Mg-5Sn合金。在重力铸造条件下发育的柱状枝晶，经离心铸造后大部分转变为细小的等轴晶。与重力铸造相比，离心铸造显著提高了合金的抗压强度、屈服强度和断裂延伸率，在位置r1（离心半径r1=0.05 m）上分别从181.6 MPa提高到257.5 MPa、38.7 MPa提高到52.3 MPa和14.9%提高到21.2%。离心铸造还提高了合金的加工硬化能力。晶体的转变使合金的压缩性能和加工硬化能力得到增强。研究结果为镁合金的特殊铸造方法提供了一些启示，为开发高强度、高伸长率的新型轻合金提供了可能。
Mg–5Sn alloy are successfully fabricated by a horizontal centrifugal casting method. Developed columnar dendritic crystals under the gravity casting condition can be mostly transformed into fine equiaxed grains by the centrifugal casting. Compared with the gravity casting, compression strength, yield strength and elongation-to-failure are significantly improved by the centrifugal casting, which increase from 181.6 to 257.5 MPa, 38.7 to 52.3 MPa and 14.9% to 21.2% on positionr1(centrifugal radiusr1=0.05 m), respectively. Moreover, the centrifugal casting also enhances work-hardening ability of the alloy. The transformation of crystals results in the enhancement of the compression properties and work-hardening ability. The results obtained here will shed some light on special casting methods of Mg alloys, which is potential to develop new light alloys with high strength and elongation.