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首页> 外文期刊>Journal of Materials Science >The influence of annealing twinning on microstructure evolution
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The influence of annealing twinning on microstructure evolution

机译：退火孪晶对组织演变的影响

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摘要

This paper reports an experimental investigation on the effect of multiple twinning on the interface population in two low stacking-fault alloys. This is an important topic for grain boundary engineering because annealing twinning is the indirect cause of improved intergranular corrosion resistance in this class of materials. Proportions of Σ 3n (n = 1–5) boundaries were analysed in both a brass specimen and a superalloy specimen where the boundaries had been processed so as to be very mobile and less mobile respectively. When Σ 3 twin boundaries (as distinct from Σ 3 grain boundaries) are discounted, the Σ 3n distribution for both specimens had a peak at Σ 9, because Σ 3 + Σ 9 → Σ 3 occurs more frequently than Σ 3+Σ 9 → Σ 27. The distributions and reactions between various Σ 3n values are described and discussed in detail. A novel trace analysis procedure is used to extract information from Σ 3 boundaries to decide whether or not they are annealing twins, and so provide a convenient means to assess proportions of twin and non-twin Σ 3s. The data show unambiguously that a significant proportion of Σ 3s are not on 111, and these boundaries have on average higher angular deviations from the exact Σ 3 reference misorientation than do other Σ 3s. A population of Σ 3s which were vicinal to annealing twins were also recorded. These data support the contention that profuse annealing twinning produces concurrently many not-twin Σ 3s, which are pivotal in grain boundary engineering.
机译：本文报告了一种实验研究，涉及在两种低堆垛层错合金中多重孪晶对界面族的影响。这是晶界工程的重要课题，因为退火孪晶是此类材料中改善的耐晶间腐蚀性能的间接原因。分析了黄铜样品和高温合金样品中Σ3n （n = 1-5）边界的比例，在这些样品中已对边界进行了处理，使其移动性和移动性均较低。当对Σ3双晶界（不同于Σ3晶界）进行折现时，两个样品的Σ3n 分布在Σ9处出现峰值，因为Σ3 +Σ9→Σ3的发生频率比Σ3高+Σ9→Σ27。对Σ3n 值之间的分布和反应进行了详细描述和讨论。一种新颖的痕量分析程序可用于从Σ3边界中提取信息，以确定它们是否为双胞胎，从而为评估双胞胎和非双胞胎Σ3s的比例提供了一种方便的方法。数据清楚地表明，很大一部分Σ3s不在111上，并且与其他Σ3s相比，这些边界与精确Σ3参考取向差的平均角度偏差更大。还记录了对退火双胞胎不利的Σ3s群体。这些数据支持大量退火孪晶同时产生许多非孪晶Σ3的观点，这在晶界工程中至关重要。

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  • 来源
    《Journal of Materials Science》 |2005年第4期|853-859|共7页
  • 作者

    V. Randle;

  • 作者单位

    Materials Research Centre University of Wales Swansea;

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  • 正文语种 eng
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