Atom-probe tomographic study of γ/γ′ interfaces and compositions in an aged Co-Al-W superalloy

被引：60

作者：

Bocchini, Peter J. ^{[1
]}

Lass, Eric A. ^{[2
]}

Moon, Kil-Won ^{[2
]}

Williams, Maureen E. ^{[2
]}

Campbell, Carelyn E. ^{[2
]}

Kattner, Ursula R. ^{[2
]}

Dunand, David C. ^{[1
,2
]}

Seidman, David N. ^{[1
,3
]}

机构：

[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[2] NIST, Div Met, Gaithersburg, MD 20899 USA

[3] NUCAPT, Evanston, IL 60208 USA

来源：

SCRIPTA MATERIALIA | 2013年 / 68卷 / 08期

关键词：

Cobalt alloys; Superalloy; Atom-probe tomography; Intermetallic compounds; Interfaces; COBALT-BASE ALLOYS; MECHANICAL-PROPERTIES; COMPOUND CO-3(AL; W); KINETIC PATHWAYS; CR ALLOYS; PHASE; DEFORMATION; SEGREGATION; EVOLUTION; SINGLE;

D O I：

10.1016/j.scriptamat.2012.11.035

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Atom-probe tomography (APT) is utilized to investigate, in a Co-9.7Al-10.8W at.% alloy aged at 900 degrees C for similar to 1000 h, the phase compositions and partitioning behavior of the two-phase gamma(face-centered cubic)/gamma'(L1(2)) microstructure. The APT composition of the gamma-matrix (Co-8.97Al-5.69W at.%) agrees well with a previously reported measurement made by energy-dispersive X-ray spectroscopy; however, the composition of the gamma'(L1(2)) precipitates (Co-10.03Al-12.48W at.%) is slightly richer in W and Al, and leaner in Co. Partitioning coefficients and Al interfacial excesses are also calculated. (c) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：563 / 566

页数：4

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