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您的检索式：作者名="M.Sabbaghian"
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| 1 | Effect of texture and twinning on mechanical properties and corrosion behavior of an extruded biodegradable Mg-4Zn alloy显示文摘Microstructure,texture,mechanical properties and corrosion behavior of the extruded Mg-4Zn alloy,as a biodegradable material,were investigated.A refined microstructure caused by dynamic recrystallization(DRX),and a general fiber texture were achieved after extrusion.Mechanical properties along different directions of the extruded samples were investigated using shear punch test(SPT).The shear yield stress(SYS)of 113.8 MPa obtained in the transverse direction(TD)was higher than the 106 MPa achieved for the extruded direction(ED)and 45˚samples.This was attributed to the higher amounts of twins and also lower Schmid factor(SF)in the TD.On the other hand,encouraged activation of the basal slip system in the 45˚samples resulted in improved room temperature formability,as indicated by the normalized displacement in the SPT diagram.Electron back scattered diffraction(EBSD)analysis of the surfaces corroded in the phosphate buffered saline(PBS)solution,showed that despite having similar grain sizes and second phase particles shape and volume fractions,surfaces containing grains near(0001)orientations and extension twins<10¯12>(TD and 45˚samples)have lower corrosion rates,as compared to the ED specimens. | M.Sabbaghian R.Mahmudi K.S.Shin | 2019 | Journal of Magnesium and Alloys2019，7，4： | 10 |
| 2 | 等通道侧向挤压和板材挤压法制备细晶ZK60镁合金板材的热剪切变形本构分析显示文摘采用不同道次等通道侧向挤压(DECLE)和板材挤压成形发制备细晶ZK60合金板材。经过3和5道次DECLE和后续挤压后,退火样品中的粗大晶粒(68μm)分别变为6.0μm和5.2μm的细小晶粒。基于冲孔剪切实验(SPT)结果建立本构方程,研究合金的热剪切变形行为。SPT的温度范围为200~300℃,应变率范围为0.003~0.33 s^(−1)。计算结果表明,所有条件下制备的样品的活化能为125~139 kJ/mol,应力指数为3.5~4.2,表明主要的热变形机制是位错蠕变,由位错攀移和溶质拖曳机制控制。材料常数n和Q取决于晶粒尺寸,第二相颗粒比例等微观结构因素,通过三维曲面曲线预测了二者的关系。此外,挤压后的ZK60板材具有相似的强基面织构,因此,合金在SPT过程中具有相同的变形机制与相近的n和Q值。 | N.FAKHAR M.SABBAGHIAN | 2022 | Transactions of Nonferrous Metals Society of China2022，32，8： | 0 |
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