...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Science >Formation mechanism and coarsening behavior of fan-type structures in a new Ni-Cr-Co-based powder metallurgy superalloy
【24h】

Formation mechanism and coarsening behavior of fan-type structures in a new Ni-Cr-Co-based powder metallurgy superalloy

机译：新型Ni-Cr-Co基粉末冶金高温合金中扇形组织的形成机理和粗化行为

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

The formation mechanism and coarsening behavior of fan-type structures in a new Ni-Cr-Co-based powder metallurgy superalloy were investigated by means of field scanning electron microscope, transmission electron microscope, electron backscattered diffraction, and differential scanning calorimetry. The results show that he fan-type structures consist of finger-shaped λ dendrites and c matrix between them. They nucleate in the chemical segregation regions on grain boundaries and grow by diffusion. There are three types of solute atoms flow: (a) rapid diffusion along grain boundary; (b) the diffusion from supersaturated c matrix to fan-type c0 phases; and (c) shortdistance diffusion from the previous formed λ0 phases at high temperature to c0 phases formed at low temperature within the branches of fan-type structures. These λ dendrites are perpendicular to grain boundaries and grow asymmetrically, resulting in grain boundary serration. In addition, the fan-type structures coarsen within the c0 depletion zone after the standard aging treatment.
机译：通过场扫描电子显微镜，透射电子显微镜，电子背散射衍射和差示扫描量热法研究了新型Ni-Cr-Co基粉末冶金高温合金中扇形结构的形成机理和粗化行为。结果表明，他的扇形结构由手指形的λ树突和它们之间的c矩阵组成。它们在晶界上的化学偏析区成核并通过扩散生长。有三种类型的溶质原子流：（a）沿晶界快速扩散; （b）从过饱和c矩阵到扇形c0相的扩散; （c）在扇形结构的分支内从先前形成的高温λ0相到低温形成的c0相的短距离扩散。这些λ树枝状晶体垂直于晶界并且不对称地生长，从而导致晶界锯齿。另外，在标准时效处理后，风扇型结构在c0耗尽区内变粗。

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