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The Role of Sm in Precipitates, Grain Sizes,and Tensile Properties of As‐Cast and As‐Extruded AZ31–0.3La Alloys
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2019-12-27 , DOI: 10.1002/adem.201901215 Li Fu 1, 2 , Wenxin Hu 3 , Qichi Le 2 , Zheng Jia 1 , Lin Lu 1
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2019-12-27 , DOI: 10.1002/adem.201901215 Li Fu 1, 2 , Wenxin Hu 3 , Qichi Le 2 , Zheng Jia 1 , Lin Lu 1
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Herein, the effect of Sm on precipitates, grain sizes, and tensile properties of AZ31–0.3La alloy is investigated. Results indicate that Sm is almost dissolved in α‐Mg matrix with 0.2% content, whereas Al2Sm with two kinds of morphologies forms with further Sm addition. The grain sizes of as‐cast studied alloy increase first and then decrease with increasing Sm addition, whereas the dynamic recrystallization (DRX) grain sizes decrease first and then increase, and the DRX grain size distribution is uniform first and then uneven. During the hot extrusion process, the refinement of DRXed grains is attributed to the particle‐stimulated nucleation (PSN) mechanism. The Rp0.2 (yield strength) of as‐extruded studied alloy is changed from twin‐dominated to slip‐dominated by 0.2% Sm addition, and the basal texture is slightly weakened due to the refined DRX grains and even‐distributed grain size distribution, and the minor solute Sm atoms segregating at grain boundaries. Finally, the Rp0.2 of the as‐extruded AZ31–0.3La alloy is gradually enhanced with increasing Sm addition, and the A (elongation) is increased to 25% with 0.2% Sm addition and maintains to about 20% with 0.6–1.7% Sm addition.
中文翻译：
Sm在铸态和铸态AZ31-0.3La合金的析出，晶粒尺寸和拉伸性能中的作用
在此，研究了Sm对AZ31-0.3La合金的析出物，晶粒尺寸和拉伸性能的影响。结果表明，Sm几乎以0.2％的含量溶解在α-Mg基质中，而进一步添加Sm会形成两种形态的Al 2 Sm。铸态研究合金的晶粒尺寸先增加，然后随着Sm添加量的增加而减小，而动态再结晶（DRX）晶粒尺寸先减小然后增大，并且DRX晶粒尺寸分布先均匀然后不均匀。在热挤压过程中，DRX晶粒的细化归因于颗粒刺激形核（PSN）机制。在[R P0.2挤压后研究合金的（屈服强度）由添加了0.2％Sm的双晶为主转变为滑晶为主，并且由于精炼的DRX晶粒和均匀分布的晶粒尺寸，基体组织略有减弱，并且次要的溶质Sm原子在晶界处偏析。最后，随着Sm添加量的增加，挤压后的AZ31–0.3La合金的R p0.2逐渐增加，而Sm添加0.2％时，A（伸长率）增加至25％，而0.6–1时则保持在20％左右。添加1.7％Sm。
更新日期：2019-12-27
中文翻译：
Sm在铸态和铸态AZ31-0.3La合金的析出，晶粒尺寸和拉伸性能中的作用
在此，研究了Sm对AZ31-0.3La合金的析出物，晶粒尺寸和拉伸性能的影响。结果表明，Sm几乎以0.2％的含量溶解在α-Mg基质中，而进一步添加Sm会形成两种形态的Al 2 Sm。铸态研究合金的晶粒尺寸先增加，然后随着Sm添加量的增加而减小，而动态再结晶（DRX）晶粒尺寸先减小然后增大，并且DRX晶粒尺寸分布先均匀然后不均匀。在热挤压过程中，DRX晶粒的细化归因于颗粒刺激形核（PSN）机制。在[R P0.2挤压后研究合金的（屈服强度）由添加了0.2％Sm的双晶为主转变为滑晶为主，并且由于精炼的DRX晶粒和均匀分布的晶粒尺寸，基体组织略有减弱，并且次要的溶质Sm原子在晶界处偏析。最后，随着Sm添加量的增加，挤压后的AZ31–0.3La合金的R p0.2逐渐增加，而Sm添加0.2％时，A（伸长率）增加至25％，而0.6–1时则保持在20％左右。添加1.7％Sm。
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