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Influence of pre-recovery on the subsequent recrystallization and mechanical properties of a twin-roll cast Al-Mn alloy

机译：预回收对双辊铸造Al-Mn合金后续再结晶和力学性能的影响

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摘要

A two-step annealing treatment consisting of a pre-recovery process (450 ℃/5 h) and a following recrystallization process (530 ℃/15 h) was developed for a cold-rolled twin-roll cast 3003 alloy (Al-l.13Mn-0.45Fe-0.lSi in wt%) sheet. The effects of pre-recovery on recrystallization behavior and mechanical properties were systematically studied. Our results show that fine quasi-equiaxed grains together with very weak ND-rotated cube (001) < 310 > texture was successfully obtained using the proposed two-step annealing treatment. It is found that pre-recovery stimulates the formation of precipitates-free zones around constituent particles. Within such precipitates-free zones, substantial random oriented sub-grains can readily grow to critical size for nucleation, which contribute to enhanced nucleation without preferential orientation. This is the reason for the formation of fine grains as well as a weak texture in the two-step annealed sheet. The sheets that were subject to this two-step annealing also exhibits an extremely weak mechanical anisotropy with a Δr value 0.03, much lower than that of sample (0.31) subjected to a single-step annealing at 530 ℃ for 15 h.
机译：针对冷轧双辊铸造3003合金（Al-1），开发了由预恢复过程（450℃/ 5 h）和随后的重结晶过程（530℃/ 15 h）组成的两步​​退火处理。以重量％计的13Mn-0.45Fe-0.lSi片）。系统研究了预回收对再结晶行为和力学性能的影响。我们的结果表明，使用拟议的两步退火处理可以成功地获得细的准均衡晶粒以及非常弱的ND旋转立方（001）<310>织构。发现预回收促进了组成颗粒周围无沉淀物区域的形成。在这种无沉淀物的区域内，大量的随机取向的亚晶粒可以很容易地生长到临界尺寸以进行成核，这有助于在没有优先取向的情况下增强成核作用。这是在两步退火的板中形成细晶粒以及弱织构的原因。经过两步退火的片材还表现出极弱的机械各向异性，Δr值为0.03，远低于在530℃下单步退火15 h的样品（0.31）。

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  • 来源
    《Materials Science and Engineering》 |2017年第13期|63-72|共10页
  • 作者

    Li Huang; Guangjie Huang; Lingfei Cao; Xiaodong Wu; Zhihong Jia; Mingyong Xia; Qing Liu;

  • 作者单位

    College of Materials Science and Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, China;

    College of Materials Science and Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, China;

    College of Materials Science and Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, China;

    College of Materials Science and Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, China;

    College of Materials Science and Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, China;

    College of Materials Science and Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, China;

    College of Materials Science and Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Aluminum alloys; ecrystallization; Nucleation; Pre-recovery; Grain refinement; Anisotropy;

    机译：铝合金;结晶成核;恢复前;晶粒细化;各向异性;

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