Microstructure and Mechanical Properties of the As-Cast and As-Homogenized Mg-Zn-Sn-Mn-Ca Alloy Fabricated by Semicontinuous Casting.
Microstructure and Mechanical Properties of the As-Cast and As-Homogenized Mg-Zn-Sn-Mn-Ca Alloy Fabricated by Semicontinuous Casting.
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DOI：
10.3390/ma11050703
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发表时间：
2018-04-29
期刊：
影响因子：
--
通讯作者：
Yu J
中科院分区：
文献类型：
--
作者：
Lu X;Zhao G;Zhou J;Zhang C;Yu J
采用连续铸造法制备了直径130 mm、长度4800 mm的新型低成本Mg-3.36 Zn-1.06 Sn-0.33 Mn-0.27 Ca（wt %）合金铸锭。研究了铸锭不同区域的显微组织和力学性能。研究了不同一步均匀化和两步均匀化条件下合金的显微组织和力学性能。铸态合金的平均晶粒尺寸和第二相尺寸从中心到表面逐渐减小，而第二相的面积分数逐渐增加。在锭径的1/2处，合金轴向综合力学性能沿着最佳，这是由于晶粒尺寸较小、第二相含量低和组织均匀的综合作用。对于均匀化态合金，最佳两步均匀化工艺参数为340 °C × 10 h + 520 °C × 16 h。均匀化处理后，CaMgSn相的尺寸和形貌有利于提高合金的组织均匀性和力学性能。此外，合金的屈服强度降低了20.7%，延伸率提高了56.3%，更有利于后续的热变形加工。
In this paper, a new type of low-cost Mg-3.36Zn-1.06Sn-0.33Mn-0.27Ca (wt %) alloy ingot with a diameter of 130 mm and a length of 4800 mm was fabricated by semicontinuous casting. The microstructure and mechanical properties at different areas of the ingot were investigated. The microstructure and mechanical properties of the alloy under different one-step and two-step homogenization conditions were studied. For the as-cast alloy, the average grain size and the second phase size decrease from the center to the surface of the ingot, while the area fraction of the second phase increases gradually. At one-half of the radius of the ingot, the alloy presents the optimum comprehensive mechanical properties along the axial direction, which is attributed to the combined effect of relatively small grain size, low second-phase fraction, and uniform microstructure. For the as-homogenized alloy, the optimum two-step homogenization process parameters were determined as 340 °C × 10 h + 520 °C × 16 h. After the optimum homogenization, the proper size and morphology of CaMgSn phase are conducive to improve the microstructure uniformity and the mechanical properties of the alloy. Besides, the yield strength of the alloy is reduced by 20.7% and the elongation is increased by 56.3%, which is more favorable for the subsequent hot deformation processing.
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DOI：
10.3390/ma10030253
发表时间：
2017-03-02
期刊：
Materials (Basel, Switzerland)
影响因子：
--
作者：
Luo X;Cao G;Zhang W;Qiu C;Zhang D
通讯作者：
Zhang D
DOI：
10.3390/ma10070822
发表时间：
2017-07-18
期刊：
Materials (Basel, Switzerland)
影响因子：
--
作者：
Cheng W;Bai Y;Wang L;Wang H;Bian L;Yu H
通讯作者：
Yu H
含稀土 ME20 镁合金的应变控制低周疲劳性能
DOI：
10.1016/j.msea.2016.03.024
发表时间：
2016-04-20
影响因子：
6.4
作者：
Mirza, F. A.;Wang, K.;Ma, Z. Y.
通讯作者：
Ma, Z. Y.
影响因子：
8.4
作者：
Nayyeri, G.;Mahmudi, R.
通讯作者：
Mahmudi, R.
DOI：
10.1016/j.msea.2016.08.093
发表时间：
2016-10-31
影响因子：
6.4
作者：
Kim, Sang-Hoon;Park, Sung Hyuk
通讯作者：
Park, Sung Hyuk