Improved ductility of Mg–Zn–Ce alloy by hot pack-rolling

Improved ductility of Mg–Zn–Ce alloy by hot pack-rolling
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热轧提高Mg-Zn-Ce合金的延展性

DOI:
10.1016/j.msea.2013.07.011
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发表时间:
2013-11
期刊:
Materials Science&Engineering, A
影响因子:
--
通讯作者:
J.Dong
J.Dong
中科院分区:
其他
文献类型:
--
作者:
L.Gao;J.Wang;Z.Y.Zhang;J.Dong

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研究了Mg-2%Zn-0.5%Ce(ZE 20)合金热包轧板材的显微组织和力学性能。结果表明,ZE 20薄板经叠轧后,由于热损失减少,再结晶组织细小,织构较弱,塑性较好,r值较低。常规轧制试样在给定温度下的退火处理对塑性的改善略有效果,然而,导致强烈的基面织构。在723 K下轧制时,Mg-RE合金的织构更加随机化,各向异性减弱,表明包轧过程中的温度-应变参数处于一个合适的窗口内,溶质拖曳效应和织构的随机化程度较低。
The microstructure and mechanical properties of Mg–2%Zn–0.5%Ce (ZE20) sheets by hot pack-rolling was investigated. The results showed that pack-rolled ZE20 sheets exhibited a fine recrystallized microstructure, weak texture, good ductility and a lowr-value due to the reduction of heat losses by pack-rolling processing. Annealing treatment at the given temperature for conventional-rolled specimens was slightly effective for the improvement of ductility, however, resulting in strong basal texture. More randomized texture and weaker anisotropy were obtained when rolled at 723 K, which might indicate that the temperature-strain parameters in pack-rolling were in a suitable window for solute drag effect and texture randomization in Mg–RE alloy.
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