...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Philosophical Magazine Letters >Formation of a 'splitting pattern' associated with L1_2 precipitates in Ir-Nb alloys
【24h】

Formation of a 'splitting pattern' associated with L1_2 precipitates in Ir-Nb alloys

机译：Ir-Nb合金中与L1_2析出物有关的“分裂模式”的形成

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A cuboidal L1_2 phase forms in the fcc matrix of an Ir-Nb alloy. Under some conditions, a rod- or plate-like fcc structure can be observed in this phase. This is similar to the splitting pattern' observed in some Ni-based alloys. To understand the formation mechanism of this structure, samples were heated under different conditions. Microstructure evolution during ageing was observed by transmission electron microscopy. We observed a splitting pattern only when the L1_2 precipitates were already formed in the as-cast condition after additional heat treatment at the ageing temperature. In this case, the composition of the L1_2 phase was not equilibrated. We conclude that the splitting pattern appears owing to a kinetic phenomenon when the L1_2 phase changes to the equilibrium composition.
机译：在Ir-Nb合金的fcc基质中形成长方体的L1_2相。在某些条件下，在此阶段可以观察到棒状或板状fcc结构。这类似于在某些镍基合金中观察到的分裂模式。为了了解这种结构的形成机理，在不同条件下加热样品。通过透射电子显微镜观察了老化过程中的微观结构演变。我们仅在经过时效温度下的额外热处理后，在铸态条件下已经形成L1_2沉淀物时才观察到裂痕。在这种情况下，L1_2相的组成不平衡。我们得出的结论是，当L1_2相变为平衡组成时，由于动力学现象而出现了分裂模式。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号