PHASE-COMPOSITION AND GRAIN-BOUNDARY SEGREGATION IN A NICKEL-BASE SUPERALLOY - A PRELIMINARY TEM-APFIM INVESTIGATION

被引：17
|
作者：
BUCHON, A
MENAND, A
BLAVETTE, D
机构：
[1] Laboratoire de Microscopic Ionique, URA CNRS 808, UFR Sciences, 76134 Mont Saint Aignan
来源：
SURFACE SCIENCE | 1991年 / 246卷 / 1-3期
关键词：
D O I：
10.1016/0039-6028(91)90418-R
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The role played by minor elements such as boron or zirconium in the improvement of ductility of a two-phase gamma/gamma' nickel base superalloy (NA4) is investigated. TEM, FIM and atom-probe techniques are used in a combined way for the study of grain boundaries and gamma/gamma' interfaces. Investigations demonstrate that boron as well as zirconium are preferentially located in the gamma solid solution. Microanalyses show that boron segregates at grain boundaries but not zirconium. Local composition gradients for aluminium or nickel are also found in the close vicinity of boundaries.
引用
收藏
页码：218 / 224
页数：7
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