预轧制路径对ZK60镁合金力学性能的影响

采用低轧制压下量的预冷轧(<3％)来改善轧制ZK60板的力学性能.详细研究轧制路径对力学性能的影响.沿横向的预冷轧和沿法向的预冷轧均可提高屈服强度.但是,在改善综合力学性能方面,沿横向预冷轧比沿法向预冷轧更为有效.预冷轧3％的压下量后,沿横向轧制的样品和沿法向轧制的样品具有相近的拉伸屈服强度(?270 MPa).但是,...

Effect of pre-rolling path on mechanical properties of rolled ZK60 alloys

Pre-cold rolling with low reductions (<3%) was used to improve the mechanical properties of rolled ZK60 plates. The effects of rolling path on mechanical properties were investigated in detail. Both pre-cold rolling along the transverse direction (TD) and pre-cold rolling along the normal direction (ND) can increase the yield strength. However, pre-cold rolling along the TD is more effective than pre-cold rolling along the ND in improving the comprehensive mechanical properties. After pre-cold rolling to 3% reduction, the sample rolled along the TD and the sample rolled along the ND have similar tensile yield strength (～270 MPa). However, the former has a higher compressive yield strength, lower yield asymmetry and larger toughness than the latter. Moreover, pre-cold rolling can also enhance precipitation hardening effect. However, aging treatment cannot further improve the yield strength of pre-cold rolled samples. Finally, the related mechanism is discussed.