Microstructure and creep strength of different γ/γ′-strengthened Co-base superalloy variants

被引：284

作者：

Bauer, A. ^{[1
]}

Neumeier, S. ^{[1
,2
]}

Pyczak, F. ^{[3
]}

Goeken, M. ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Inst 1, Dept Mat Sci & Engn, D-91058 Erlangen, Germany

[2] Univ Cambridge, Rolls Royce UTC, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

[3] GKSS Forschungszentrum Geesthacht GmbH, Inst Mat Res, D-21502 Geesthacht, Germany

来源：

SCRIPTA MATERIALIA | 2010年 / 63卷 / 12期

关键词：

Superalloy; Cobalt; Thermal stability; Volume fraction; Creep;

D O I：

10.1016/j.scriptamat.2010.08.036

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The influence of W, Ta, Ti, Nb, V, Si, Mo, Ir and Cr on the high temperature properties of gamma/gamma'-strengthened Co-Al-W superalloys was investigated. All alloys exhibited a gamma/gamma' microstructure with remarkably differing gamma' volume fractions. W, Ta, Ti, Nb and V increased the gamma' volume fraction and gamma' solvus temperature. An increased W content and alloying of additional elements, except Ir, decreased the liquidus temperature. First creep experiments revealed a creep strength comparable with polycrystalline Ni-base superalloys and the importance of grain boundary strengthening. (c) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1197 / 1200

页数：4

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