首页> 外文期刊>International Journal of Metalcasting: Leading the Transfer of Research and Technology for the Global Metalcasting Industry >Effect of Alloy Composition on Microstructure and Tensile Properties of Net-Shaped Castings of Al-Zn-Mg-Cu Alloys
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Effect of Alloy Composition on Microstructure and Tensile Properties of Net-Shaped Castings of Al-Zn-Mg-Cu Alloys

机译:合金组合物对Al-Zn-Mg-Cu合金净形铸件微观结构和拉伸性能的影响

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摘要

In this study, the effect of alloy composition on uniaxial tensile properties of Al-Zn-Mg-Cu alloys was investigated using seven distinctive alloy compositions. The sample alloys were manufactured as net-shaped components using the controlled diffusion solidification technology coupled with the tilt pour gravity casting process. The effect of T4 and T6 heat treatment on the castings was investigated using seven alloy compositions with the total alloying content (Zn+Mg+Cu) varying from 4.6 to 10.6wt%. The uniaxial tensile yield strengths (0.2% proof stress) of the respective alloys were measured for T4 temper and varied between 125 and 316MPa and for the T6 temper samples varied between 280 and 540MPa. A quantitative image analysis was carried out to measure the eutectic phase fraction, which was compared with predictions from thermodynamic solidification simulations. The experimental phase characterization of various secondary phases/precipitates was conducted using an electron microscopy (STEM) methodology along with energy dispersive spectroscopy (EDS) results; other experimental method such as the Archimedes' density measurements was also used to evaluate porosity content in the samples.
机译:在该研究中,使用七种独特合金组合物研究了合金组合物对Al-Zn-Mg-Cu合金的单轴拉伸性质的影响。使用与倾斜倾重铸造工艺相结合的受控扩散凝固技术制造样品合金作为网状部件。使用7合金组合物研究了T4和T6热处理对铸件的影响,其总合金组合物从4.6-10.6wt%的总合金化含量(Zn + Mg + Cu)不同。测量各种合金的单轴拉伸屈服强度(0.2%检测应力)进行T4脾气,在125和316MPa之间变化,并且对于T6回火样品在280和540MPa之间变化。进行定量图像分析以测量共晶相级分,与来自热力学凝固模拟的预测进行比较。使用电子显微镜(茎)方法以及能量分散光谱(EDS)结果进行各种副阶段/沉淀物的实验相表征;其他实验方法,例如Archimedes的密度测量也用于评估样品中的孔隙率。

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