Evolution of microstructure and mechanical properties of coated Co-base superalloys during heat treatment and thermal exposure

被引：15
作者：
Webler, Ralf [1 ]
Ziener, Marco [1 ]
Neumeier, Steffen [1 ]
Terberger, Philipp J. [2 ]
Vassen, Robert [2 ]
Goeken, Mathias [1 ]
机构：
[1] Univ Erlangen Nurnberg, Mat Sci & Engn 1, D-91058 Erlangen, Germany
[2] Forschungszentrum Julich, Inst Energie & Klimaforsch IEK 1, D-52425 Julich, Germany
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 628卷
关键词：
Co-base superalloy; Coating; Recrystallization; Nanoindentation; HIGH-TEMPERATURE COATINGS; OXIDATION BEHAVIOR; NICKEL;
D O I：
10.1016/j.msea.2015.01.060
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
New gamma'-strengthened Co-base superalloys show an interesting potential for high temperature applications. However, protective coatings are needed as for Ni-base superalloys to ensure sufficient oxidation and corrosion resistance. Therefore the properties of a commercial coating on a multinary new gamma'-strengthened Co-base superalloy have been studied. Especially the influence of the coating process on the substrate also after long term annealing is discussed. It was found that the highly deformed areas at the coating-substrate interface indicated by a high local misorientation and caused by the sandblasting process led to a recrystallization of the interdiffusion zone during the age hardening heat treatment. A chemical gradient of gamma and gamma' promoting elements was found in the interdiffusion zone causing a change in hardness as measured by nanoindentation. Depending on the composition two separate recrystallized regions formed in the interdiffusion zone, one with single phase gamma-(Co,Ni) and the other with a cellular two phase microstructure of discontinuously grown gamma and gamma'. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：374 / 381
页数：8
相关论文
共 21 条
[1]   Microstructure and creep strength of different γ/γ′-strengthened Co-base superalloy variants [J].
Bauer, A. ;
Neumeier, S. ;
Pyczak, F. ;
Goeken, M. .
SCRIPTA MATERIALIA, 2010, 63 (12) :1197-1200
[2]   The oxidation behaviour of sprayed MCrAlY coatings [J].
Brandl, W ;
Grabke, HJ ;
Toma, D ;
Kruger, J .
SURFACE & COATINGS TECHNOLOGY, 1996, 86 (1-3) :41-47
[3]   PROTECTIVE COATINGS IN THE GAS-TURBINE ENGINE [J].
DEMASIMARCIN, JT ;
GUPTA, DK .
SURFACE & COATINGS TECHNOLOGY, 1994, 68 :1-9
[4]   Microstructure and local mechanical properties of Pt-modified nickel aluminides on nickel-base superalloys after thermo-mechanical fatigue [J].
Franke, Oliver ;
Durst, Karsten ;
Goeken, Mathias .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 467 (1-2) :15-23
[5]   Microstructural properties of superalloys investigated by nanoindentations in an atomic force microscope [J].
Göken, M ;
Kempf, M .
ACTA MATERIALIA, 1999, 47 (03) :1043-1052
[6]   The effect of nickel and silicon addition on some oxidation properties of novel Co-based, high temperature alloys [J].
Klein, L. ;
Killian, M. S. ;
Virtanen, S. .
CORROSION SCIENCE, 2013, 69 :43-49
[7]   Effect of B and Cr on the high temperature oxidation behaviour of novel γ/γ′-strengthened Co-base superalloys [J].
Klein, L. ;
Shen, Y. ;
Killian, M. S. ;
Virtanen, S. .
CORROSION SCIENCE, 2011, 53 (09) :2713-2720
[8]   High temperature oxidation of γ/γ′-strengthened Co-base superalloys [J].
Klein, L. ;
Bauer, A. ;
Neumeier, S. ;
Goeken, M. ;
Virtanen, S. .
CORROSION SCIENCE, 2011, 53 (05) :2027-2034
[9]   Determination of phase equilibria in the Co-rich Co-Al-W ternary system with a diffusion-couple technique [J].
Kobayashi, Satoru ;
Tsukamoto, Yuki ;
Takasugi, Takayuki ;
Chinen, Hibiki ;
Omori, Toshihiro ;
Ishida, Kiyohito ;
Zaefferer, Stefan .
INTERMETALLICS, 2009, 17 (12) :1085-1089
[10]   Controlling the oxygen contents in vacuum plasma sprayed metal alloy coatings [J].
Mauer, Georg ;
Vassen, Robert ;
Stoever, Detlev .
SURFACE & COATINGS TECHNOLOGY, 2007, 201 (08) :4796-4799
123