Feasibility of high strain-rate rolling of a magnesium alloy across a wide temperature range

Feasibility of high strain-rate rolling of a magnesium alloy across a wide temperature range
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镁合金在宽温度范围内高应变率轧制的可行性

DOI:
10.1016/j.scriptamat.2012.05.036
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发表时间:
2012-08
期刊:
影响因子:
6
通讯作者:
Liao, X. Z.
Liao, X. Z.
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhu, S. Q.;Yan, H. G.;Chen, J. H.;Wu, Y. Z.;Su, B.;Du, Y. G.;Liao, X. Z.

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采用高应变率轧制(HSRR)技术,在250 ~ 400℃条件下成功制备了Mg-6.0 Zn-0.5 Zr板材。所有的薄片都具有超细晶结构,并表现出优异的强度和延展性。广泛的变形孪晶、孪晶中高密度位错的产生、随后的连续动态再结晶(DRX)和不连续动态再结晶(DRX)有助于HSRR的可行性和超细晶组织的形成。优异的力学性能是由于最终组织中晶粒超细,位错密度低,基底织构减弱。
High strain-rate rolling (HSRR) was successfully used to produce Mg–6.0 Zn–0.5 Zr sheets at 250–400°C. All the sheets have ultrafine-grained structures and exhibit excellent strength and ductility. Extensive deformation twinning, production of high-density dislocations in twins, subsequent continuous dynamic recrystallization (DRX) and discontinuous DRX contribute to the feasibility of HSRR and to the ultrafine-grained structures. The excellent mechanical properties are ascribed to the ultrafine grains, low dislocation density and weakened basal texture in the final structure.
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