کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1577229 | 1514794 | 2012 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: 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](/preview/png/1577229.png)
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.
► Mg–1%Mn and Mg–1%Mn–(0.3–2)Sr alloys were extruded at elevated temperature.
► Strontium additions refine extruded microstructure of M1 alloys.
► Sr additions weaken the basal texture of extruded M1, improve the ductility and reduce the yield asymmetry.
► Texture weakening with increasing strontium additions is the result of particle stimulated nucleation (PSN).
Journal: Materials Science and Engineering: A - Volume 549, 15 July 2012, Pages 168–175