Effects of Precipitated Particles on Microstructure Evolution during Thermo-Mechanical Processing of Al-Zn-Mg-Cu Alloy

CHEN Huiqin; ZHANG Kun; ZHAO Xiaodong

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Effects of Precipitated Particles on Microstructure Evolution during Thermo-Mechanical Processing of Al-Zn-Mg-Cu Alloy

机译：沉淀颗粒对Al-Zn-Mg-Cu合金热机械加工过程中组织演变的影响

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Two intermediate thermal-mechanical treatment (ITMT) Processes were designed for investigation the influence of multi-scale precipitated particles on microstructure evolution during thermo-mechanical processing of Al-7.6Zn-l.5Mg-l.75Cu-0.12Zr alloy by hot compressive experiments and microstructure testing of OM and EBSD. It is found that the size and distribution of precipitated particles preprocessed by over-aging at 400℃ forl4h can meet the particle stimulated nucleation of recrystallization. Refined and uniform grains present in the sample after hot deformation at about 20 of LnZ up to 80% reduction and subsequent final solid solution treatment. But for samples preprocessed by solid solution at 435°C for 2h and aging at 200℃ for 12h, Refined uniform recrystallized grains or recovery sub-grains in elongated grains present in the samples after hot deformation at about 25 of LnZ up to 60% reduction followed by annealing at 350℃ for 0.5h and final solution treatment.

机译：设计了两种中间热处理工艺（ITMT），以研究多尺度沉淀颗粒对热压缩Al-7.6Zn-1.5Mg-1.75Cu-0.12Zr合金热机械加工过程中组织演变的影响。 OM和EBSD的实验和微观结构测试。结果表明，在400℃下老化14h，预处理过的沉淀颗粒的尺寸和分布可以满足颗粒刺激的重结晶形核。热变形后，在大约20 LnZ的热变形下，样品中存在细化且均匀的晶粒，还原度高达80％，随后进行了最终的固溶处理。但是对于在435°C的固溶体中预处理2h并在200℃时效12h进行预处理的样品，热变形后，在25的LnZ下热变形后，存在于样品中的细小均匀的再结晶晶粒或细长晶粒中的回收亚晶粒降低了60％然后在350℃退火0.5小时，然后进行固溶处理。

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来源
《Materials science forum》 |2017年第1期|318-323|共6页
作者
CHEN Huiqin; ZHANG Kun; ZHAO Xiaodong;
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作者单位

Taiyuan University of Science and Technology, Taiyuan 030024, R.P. China;

Beijing Institute of Aeronautical Materials, AVIC, Beijing 100095, R.P. China;

Taiyuan University of Science and Technology, Taiyuan 030024, R.P. China;

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正文语种 eng
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关键词
Al-Zn-Mg-Cu alloys; Precipitated Particles; Microstructure evolution; Thermo-mechanical processing;

机译：Al-Zn-Mg-Cu合金;沉淀颗粒;微观组织演变;热机械加工;

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Effects of Precipitated Particles on Microstructure Evolution during Thermo-Mechanical Processing of Al-Zn-Mg-Cu Alloy

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