Phase transformation of Cu-rich precipitates from 9R to 3R variant via ledges mechanism in ferritic steel containing copper

被引：13

作者：

Chen, B. L. ^{[1
]}

Wang, W. ^{[1
]}

Xie, H. ^{[1
]}

Ge, R. R. ^{[1
]}

Zhang, Z. Y. ^{[1
]}

Li, Z. W. ^{[1
]}

Zhou, X. Y. ^{[1
]}

Zhou, B. X. ^{[2
]}

机构：

[1] Shanghai Univ Engn Sci, Sch Mat Engn, Shanghai 201620, Peoples R China

[2] Shanghai Univ, Inst Mat, Shanghai, Peoples R China

来源：

JOURNAL OF MICROSCOPY | 2016年 / 262卷 / 01期

基金：

中国国家自然科学基金;

关键词：

HRTEM; precipitation; STEM; 9R structure; 3R structure; RESOLUTION ELECTRON-MICROSCOPY; STACKING-FAULT ENERGY; MARTENSITIC-TRANSFORMATION; DEFORMATION-BEHAVIOR; ALPHA-FE; IRRADIATION; STRAIN; ALLOYS; MODEL;

D O I：

10.1111/jmi.12352

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

Precipitates and solute enrich in aged ferritic steel containing copper were examined using high-resolution electron microscopy, high-angle annular dark-field scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy. Two ledges with one-atom and two-atom layers height in the 9R/3R interface were observed. The enrichment of copper into two successive closed-packed planes with an interval of Fe-rich close-packed plane was detected. The passage of the Shockley partial, or the shearing, changes the stacking sequence of closed-packed planes. Finally, 9R Cu variant transformed into 3R Cu variant.

引用

页码：123 / 127

页数：5

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