Compression properties at different loading directions of as-extruded Mg–9RY–4Zn (RY: Y-rich misch metal) alloy with long period stacking ordered phase
Compression properties at different loading directions of as-extruded Mg–9RY–4Zn (RY: Y-rich misch metal) alloy with long period stacking ordered phase
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DOI：
10.1016/j.matdes.2013.03.065
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发表时间：
2013-10
影响因子：
8.4
通讯作者：
Zhe Leng;Jinghuai Zhang;C. Cui;Jianfeng Sun;Shujuan Liu;R. Wu;Milin Zhang
中科院分区：
文献类型：
--
作者：
Zhe Leng;Jinghuai Zhang;C. Cui;Jianfeng Sun;Shujuan Liu;R. Wu;Milin Zhang
研究了具有长周期堆叠有序（LPSO）相的挤压态 Mg-9RY-4Zn 合金在不同加载方向上的压缩性能。 ED 处的压缩屈服强度 (σ0.2)、极限压缩强度 (σ) 和断裂伸长率 (ε) 分别为 272 MPa、520 MPa 和 19%，TD 处分别为 172 MPa、412 MPa 和 17%，45° 取向时分别为 150 MPa、370 MPa 和 16%。出色的压缩性能源自 14H LPSO 条带和带有 14H LPSO 片层的随机定向 DRX 颗粒。同时，挤压态Mg-9RY-4Zn合金表现出明显的力学各向异性。 ED 方向的强度远高于 45° 方向的强度。具体到目前的合金，除了弱的基础织构外，认为具有特征取向的LPSO长条对影响力学各向异性起着重要作用。
The compression properties at different loading directions of as-extruded Mg–9RY–4Zn alloy with long period stacking ordered (LPSO) phase were investigated. The compressive yield strength (σ0.2), ultimate compressive strength (σ) and elongation to failure (ε) are 272 MPa, 520 MPa and 19% at ED, 172 MPa, 412 MPa and 17% at TD, and 150 MPa, 370 MPa and 16% at 45° orientation, respectively. The excellent compression properties result from the 14H LPSO strips and random oriented DRX grains with 14H LPSO lamellae. Meanwhile, the as-extruded Mg–9RY–4Zn alloy exhibits obvious mechanical anisotropy. The strength at ED is much higher than that at 45° orientation. Specific to the present alloy, besides the weak basal texture, it is considered that the LPSO long strips with characteristic orientation play an important role in influencing the mechanical anisotropy.