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Al-Pd-Co复杂合金相压痕形变结构的电子显微学研究

于海涛，刘翠秀，周玲玲，李万鹏，孙 威*
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2017年 第36卷 第4期: 1000-6281（2017）04-0351-07     下载地址：

Al-Pd-Co复杂合金相压痕形变结构的电子显微学研究

于海涛，刘翠秀，周玲玲，李万鹏，孙 威*

(北京工业大学固体微结构与性能研究所，北京 100024)

摘要  本文以Al-Pd-Co复杂合金相ξ’为研究对象，应用FIB技术以及透射电镜，对其室温下的纳米压痕变形微观结构进行了分析表征。结果表明，不同于传统材料的变形，ξ’相压痕下的变形结构以形成的特殊变形带结构为主要特征。这种变形带由高密度缺陷的集合组成，其在形变过程中可协调局域变形,分割晶粒，且其拓展可以选择沿某些晶体学方位优先开动。

关键词  Al-Pd-Co合金; 复杂合金相；纳米压痕；变形结构；电子显微表征

中图分类号:TG146；TG115.5；TG115.21+5.3  文献标识码：A   doi:10.3969/j.issn.1000-6281.2017.04.008

 

Electron microscopy study of indentation deformation structure of Al-Pd-Co complex alloy phase

YU Hai-tao，LIU Cui-xiu，ZHOU Ling-ling，LI Wan-peng，SUN Wei*

(Institute of Microstructure and Properties of Advanced Material Beijing University of Technology，Beijing 100024，China)

Abstract  In this paper, the room-temperature nanoindentation-induced deformation structure in the Al-Pd-Co complex alloy phase ξ’ has been studied by a combination of FIB fabrication technique and electron microscopy. The results show that, unlike the case in a traditional material, the evolution of deformation structure beneath an indent in the ξ’ phase is characterized by the formation of a kind of special deformation band. This kind of deformation band, which can propagate preferentially along some crystallographic planes, is constructed by coupling deformation defects of high density, and its generation and extension are responsible for accommodating plastic strain and for subdividing grain as well during the indentation process.

Keywords  Al-Pd-Co；complex alloy phase；nanoindentation；deformation structure；electron microscopy

 

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