Improvement of Yield Asymmetry and Enhancement of Mechanical Properties of Extruded AZ110 Alloy with La-Rich Misch Metal Addition

Qiyu Liao; Wenxin Hu; Qichi Le; Xingrui Chen; Yanchao Jiang

doi:10.1007/s12540-021-00978-9

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자료유형: 학술저널

저자정보: Qiyu Liao (Northeastern University) Wenxin Hu (Baotou Research Institute of Rare Earths) Qichi Le (Northeastern University) Xingrui Chen (Northeastern University) Yanchao Jiang (Northeastern University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.28 No.5

발행연도: 2022.5

수록면: 1,143 - 1,156 (14page)

DOI: 10.1007/s12540-021-00978-9

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In this paper, effects of the La-rich MM (Misch Metal) on the microstructure, texture and mechanical properties of extrudedAZ110 alloy during tension and compression deformation were investigated. High strength and low tension?compressionyield asymmetry of AZ110MM alloy (AZ110 alloy with La-rich MM addition) are developed by hot extrusion. The additionof La-rich MM brings Al-RE phases (Al2(La, Ce) and Al11(La, Ce)3) to the as-cast AZ110 alloy, which play an importantrole in the grain refinement and texture weakening during extrusion deformation. Such grain refinement and texture weakeningobviously inhibit the nucleation and growth of twins and make the deformation mechanism change from twinning tomultiple slip during cold compression deformation. Furthermore, the Al-RE phases also improve the tension?compressionyield asymmetry performance of the extruded AZ110 alloy via the combining effects of grain refinement, texture weakeningand the transformation from twinning to multiple slip. Moreover, the extruded AZ110MM alloy shows much higher strengthover AZ110 alloy, owning to texture effect, grain boundary strengthening and precipitation strengthening.

#La-rich misch metal · AZ110 magnesium alloy · Tension?compression yield asymmetry · Texture evolution · Twinning · Mechanical properties

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