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University Press and Springer-Verlag Berlin Heidelberg 2016 Abstract: The superplasticity of Al-6Mg-0.4Mn-0.25Sc-0.12Zr and Al-6Mg-0.4Mn-0.25Er-0.12Zr (mass fraction, %) alloys sheet was investigated.... According to microstructure examination, the better superplasticity of Sc-containing alloy may be attributed to the presence of Al3(Sc, Zr) dispersoids, which can inhibit recrystallization and grain......
is improved and even superplasticity exhibits. SEM and OM were used to clarify the deformation mechanism. It is suggested that dynamic recrystallization (DRX) is the coordination deformation mechanism...; superplasticity; microstructure; deformation mechanism 1 Introduction Magnesium alloy has high potential as structural material. However, its hexagonal crystal structure provides a limited number of slip systems......
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再结晶,晶粒得到破碎而变得细小,随着变形程度的增加,晶粒长大程度较小.在变形后的断口形貌中发现,Mg-Nd合金的超塑变形机制为晶界滑移控制下的孔洞连接协调机制. 关键词:变形Mg-Nd合金; 组织; 拉伸特征; 超塑性行为; 机制; wrought Mg-Nd alloy; microstructures; tensile properties feature; superplasticity......
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应力集中,加速了试样的断裂,从而导致TA15合金在该温度下超塑性能大幅度降低. 图4 变形温度对TA15合金超塑性的影响 Fig. 4 Effect of deformation temperature on superplasticity of TA15 alloy 2.3 应变速率敏感性指数m值 应变速率敏感性指数m值的大小反映了抑制局部出现缩颈的能力,m... field[J]. Transactions of Nonferrous Metals Society of China, 2014, 24: 1819-1829. [5] 陈浦泉. 组织超塑性[M]. 哈尔滨: 哈尔滨工业大学出版社, 1988: 1-4.CHEN Pu-quan. Microstructural superplasticity[M]. Harbing: Harbing......
Superplasticity of AZ31 magnesium alloy prepared by friction stir processing ZHANG Da-tong, XIONG Feng, ZHANG Wei-wen, QIU Cheng, ZHANG Wen School of Mechanical and Automotive Engineering, South..., indicating that high strain rate superplasticity could be achieved. On the other hand, the hot-rolled base material, which has a coarse grain structure, possesses no superplasticity under......
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