Age hardening responses of as-extruded Mg-2.5Sn-1.5Ca alloys with a wide range of Al concentration
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2020年第3期
论文作者：Qiuyan Huang Yang Liu Aiyue Zhang Haoxin Jiang Hucheng Pan Xiaohui Feng Changlin Yang Tianjiao Luo Yingju Li Yuansheng Yang
文章页码：39 - 46
摘 要：This article aims to explore the age hardening responses of both as-extruded and as-aged Mg-2.5 Sn-1.5 Ca-x Al alloys（x = 2.0, 4.0 and 9.0 wt%, termed TXA322, TXA324 and TXA329, respectively） through microstructural and mechanical characterization. Results indicate that grain size of as-extruded TXA322,TXA324 and TXA329 alloys were ～ 16 μm, ～ 10 μm and ～ 12 μm, respectively. A number of and <c+a>dislocations were observed in all the as-extruded samples. Guinier – Preston（GP） zones were evidently identified in TXA322 alloy, while only a small number of Mg17 Al12 phases existed in both TXA324 and TXA329 alloys. An aging treatment facilitated the precipitation of a high number density of GP zones within the matrix of TXA322 alloy. In contrast, no obvious nano-precipitates were in as-aged TXA324 alloy. Numerous nano-Mg17 Al12 phases were formed through a following aging treatment in TXA329 alloy. In terms of mechanical properties, it is apparent that an increment in ultimate tensile strength of ～46 MPa and ～ 40 MPa was yielded in peak-aged TXA322 and TXA329 alloys, while no obvious variations in UTS were present in peak-aged TXA324 alloy, in comparison with the as-extruded counterparts.
Qiuyan Huang1，Yang Liu1，Aiyue Zhang2,3，Haoxin Jiang2,3，Hucheng Pan2,3，Xiaohui Feng1，Changlin Yang4，Tianjiao Luo1，Yingju Li1，Yuansheng Yang1
1. Institute of Metal Research, Chinese Academy of Sciences2. Key Laboratory for Anisotropy and Texture of Materials (MOE) , School of Materials Science and Engineering, Northeastern University3. Research Center for Metallic Wires, Northeastern University4. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University
摘 要：This article aims to explore the age hardening responses of both as-extruded and as-aged Mg-2.5 Sn-1.5 Ca-x Al alloys（x = 2.0, 4.0 and 9.0 wt%, termed TXA322, TXA324 and TXA329, respectively） through microstructural and mechanical characterization. Results indicate that grain size of as-extruded TXA322,TXA324 and TXA329 alloys were ～ 16 μm, ～ 10 μm and ～ 12 μm, respectively. A number of and <c+a>dislocations were observed in all the as-extruded samples. Guinier – Preston（GP） zones were evidently identified in TXA322 alloy, while only a small number of Mg17 Al12 phases existed in both TXA324 and TXA329 alloys. An aging treatment facilitated the precipitation of a high number density of GP zones within the matrix of TXA322 alloy. In contrast, no obvious nano-precipitates were in as-aged TXA324 alloy. Numerous nano-Mg17 Al12 phases were formed through a following aging treatment in TXA329 alloy. In terms of mechanical properties, it is apparent that an increment in ultimate tensile strength of ～46 MPa and ～ 40 MPa was yielded in peak-aged TXA322 and TXA329 alloys, while no obvious variations in UTS were present in peak-aged TXA324 alloy, in comparison with the as-extruded counterparts.
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