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首页> 外文期刊>Materials Science and Engineering >Quantitative metallography of precipitating and secondary phases after strengthening treatment of net shaped casting of Al-Zn-Mg-Cu (7000) alloys
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Quantitative metallography of precipitating and secondary phases after strengthening treatment of net shaped casting of Al-Zn-Mg-Cu (7000) alloys

机译:Al-Zn-Mg-Cu(7000)合金网状铸件强化处理后沉淀相和第二相的定量金相

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摘要

The effect of a near net shaped casting of the Al-Zn-Mg-Cu (Al-7000) alloys on the size and distribution of the strengthening precipitates formed during the peak age (T6) heat treatment was investigated using analytical microscopy with SEM, XRD and high resolution TEM. The near net shaped components were produced using the Controlled Diffusion Solidification (CDS) technology coupled with the tilt pour gravity casting process. Three different alloys were selected from the Al-Zn-Mg-Cu family with three distinctive sum total of alloying elements (Zn + Mg + Cu =4.3, 7.7 and 10.6 wt%). The uniaxial tensile yield strengths of these CDS cast alloys were also determined to be 279, 390 and 540 MPa, respectively. Further, the microstructural and uniaxial tensile properties of the CDS cast and wrought products of an Al-Zn-Mg-Cu alloy (AA7050) were also compared in this study.
机译:使用SEM分析显微镜研究了Al-Zn-Mg-Cu(Al-7000)合金近净形铸造对在峰龄(T6)热处理期间形成的强化沉淀物的尺寸和分布的影响, XRD和高分辨率TEM。使用控制扩散凝固(CDS)技术和倾斜浇注重力浇铸工艺生产出接近最终形状的零件。从Al-Zn-Mg-Cu族中选择了三种不同的合金,其中三种合金元素的总和分别为Zn + Mg + Cu = 4.3、7.7和10.6 wt%。这些CDS铸造合金的单轴拉伸屈服强度也分别确定为279、390和540 MPa。此外,本研究还比较了Al-Zn-Mg-Cu合金(AA7050)的CDS铸造和锻造产品的显微组织和单轴拉伸性能。

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