Effect of strontium on the texture and mechanical properties of extruded Mg-1%Mn alloys
Effect of strontium on the texture and mechanical properties of extruded Mg-1%Mn alloys
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DOI：
10.1016/j.msea.2012.04.029
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发表时间：
2012-07-15
期刊：
影响因子：
6.4
通讯作者：
Pekguleryuz, Mihriban
中科院分区：
文献类型：
--
作者：
Borkar, Hemant;Hoseini, Majid;Pekguleryuz, Mihriban
镁锰M1合金由于其可挤压性，是挤压应用的首选。在核工业中，它主要用作牺牲阳极或高温抗蠕变合金。由于锰不能提供显著的强化效果，因此不考虑将该合金用于结构应用。挤压后形成的基面织构使基面平行于挤压方向，导致力学性能各向异性。这种基面织构以及合金的低强度是其广泛应用的主要挑战。研究了添加锶对M1合金织构和力学性能的影响。M1-Sr合金在挤压过程中形成随机织构成分，从而使织构减弱。织构的随机化归因于再结晶过程中镁锶金属间化合物周围的颗粒激发形核(PSN)。研究发现，M1-Sr成分表现出强度和塑性的改善以及屈服不对称性的降低。(C)2012爱思唯尔B.V.保留所有权利。
Magnesium-manganese, M1, alloy is preferred for extrusion applications due to its extrudability. It is mainly used as a sacrificial anode or as a creep resistant alloy at elevated temperatures in the nuclear industry. Since Mn does not provide a significant strengthening effect, the alloy is not considered for structural applications. The basal texture which forms after extrusion orients the basal planes parallel to the extrusion direction causing anisotropy in mechanical properties. This basal texture, as well as the low strength of the alloy are the main challenges in its widespread applications. In this study, the effect of Sr addition on the texture and mechanical properties of M1 alloy was studied. M1-Sr alloys showed weakened texture by developing random texture components during extrusion. The texture randomisation is attributed to particle stimulated nucleation (PSN) around Mg-Sr intermetallics during recrystallisation. M1-Sr compositions are found to show improved strength and ductility as well as reduced yield asymmetry. (C) 2012 Elsevier B.V. All rights reserved.