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The influence of microchemistry on the softening behaviour of two cold-rolled Al-Mn-Fe-Si alloys

机译：微观化学对两种冷轧Al-Mn-Fe-Si合金软化行为的影响

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摘要

The influence of microchemistry on the softening behaviour of two cold-rolled Al-Mn-Fe-Si alloys with different initial amounts of Mn (0.4 and 1.0 wt%) is studied. In addition to their as-cast conditions, the supersaturated Al-Mn-Fe-Si alloys were appropriately homogenized at two different conditions, which together produce three different states of microchemistry for each alloy, i.e. solutes and second-phase particles. Samples with different microchemistry states were then cold-rolled before subsequent back-annealing at different temperatures for the two alloys. The softening and concurrent precipitation behaviours of the samples have been monitored by hardness and electrical conductivity measurements , respectively, and the final microstructure in terms of grain structure and texture has been characterized by EBSD. It is clearly demonstrated that the amount of Mn and the actual microchemistry state as determined by the homogenization procedure strongly influence the softening behaviour. Both a fine dispersion of pre-existing dispersoids and strong concurrent precipitation may slow down the recrystallization kinetics considerably and give a very coarse grain structure and textures commonly associated with dispersoids effects, although some are slightly atypical.
机译：研究了微观化学对两种初始锰含量不同（0.4和1.0 wt％）的冷轧Al-Mn-Fe-Si合金软化行为的影响。除铸态条件外，过饱和的Al-Mn-Fe-Si合金在两种不同的条件下被适当地均质化，这对于每种合金一起产生三种不同的微观化学状态，即溶质和第二相颗粒。然后对具有不同微观化学状态的样品进行冷轧，然后对这两种合金在不同温度下进行后续退火。分别通过硬度和电导率测量来监测样品的软化和同时析出行为，并且通过EBSD表征最终的微观结构，包括晶粒结构和织构。清楚地表明，通过均质程序确定的Mn含量和实际的微化学状态强烈影响软化行为。既有的弥散体的精细分散和强烈的同时沉淀都可能大大减慢重结晶动力学，并给出通常与弥散体效应相关的非常粗糙的晶粒结构和织构，尽管有些稍微不典型。

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  • 来源
    《Materials Science and Engineering》 |2014年第17期|86-96|共11页
  • 作者

    Ke Huang; Ning Wang; Yanjun Li; Knut Marthinsen;

  • 作者单位

    Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), Trondheim 7491, Norway;

    Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), Trondheim 7491, Norway;

    Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), Trondheim 7491, Norway,SINTEF Materials and Chemistry, N-7465 Trondheim, Norway;

    Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), Trondheim 7491, Norway;

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  • 正文语种 eng
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  • 关键词

    Recrystallization; Homogenization; Recrystallization texture; Dispersoids; Concurrent precipitation; Aluminium alloy;

    机译：重结晶;均质化重结晶织构;分散体;同时沉淀;铝合金;

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