The oxidation behaviour of two single crystal Ni-based superalloys has been investigated at 450°C and 550°C. Isothermal oxidation was carried out for varying times and it was found that exposure resulted in a sub-micrometre thick oxide. The external and internal oxide kinetics were studied via high-resolution image analysis and both showed sub-parabolic growth rates. Thermogravimetric tests indicated that the overall oxidation growth obeys a near quartic power law while parabolic kinetics can describe the transient oxidation period. Characterisation of the resulting oxides was carried out using electron microscopy, energy dispersive spectroscopy and X-ray diffraction. Results from thermodynamic modelling of the oxide formation are also presented to further assess the postulated mechanism of low-temperature oxidation in these Ni-based superalloys.
YuriM, MasadaJ, TsukagoshiK, Development of 1600°C-class high-efficiency Gas turbine for power generation applying J-type technology. Mitsubishi Heavy Ind Tech Rev. 2013;50:1–10.
2.
BhagiKL, RatogiV, GuptaP.A brief review on failure of turbine blades. Proceedings of STME-2013 smart technologies for mechanical engineering, Delhi;2013.
3.
KhajaviMR, ShariatMH.Failure of first stage gas turbine blades. Eng Fail Anal. 2004;11:589–597. doi: 10.1016/j.engfailanal.2003.08.010
4.
PollockTM, TinS.Nickel-Based superalloys for advanced turbine engines: chemistry, microstructure and properties. J Propuls Power. 2006;22:361–374. doi: 10.2514/1.18239
5.
HardwickeCU, LauY-C.Advances in thermal spray coatings for Gas turbines and energy generation: a review. J Therm Spray Technol. 2013;22:564–576. doi: 10.1007/s11666-013-9904-0
6.
PostolenkoV.Failure mechanisms of thermal barrier coatings for high temperature gas turbine components under cyclic thermal loading. Kiev: RWTH Aachen University; 2008.
GobelM, RahmelA, SehiitzetM.The isothermal-oxidation behavior of several nickel-base single-crystal superalloys with and without coatings. Oxid Met. 1993;39:231–261. doi: 10.1007/BF00665614
9.
LuX, TianS, YuX, Oxidation behavior of a single-crystal Ni-base superalloy in air at 900 and 1050°C. Rare Met. 2011;30:439–442. doi: 10.1007/s12598-011-0320-7
10.
SatoA, ChiuYL, ReedRC.Oxidation of nickel-based single-crystal superalloys for industrial gas turbine applications. Acta Mater. 2011;59:225–240. doi: 10.1016/j.actamat.2010.09.027
11.
LiMH, SunXF, LiJG, Oxidation behavior of a single-crystal Ni-base superalloy in Air. I: At 800 and 900°C. Oxid Met. 2003;59:591–605. doi: 10.1023/A:1023604214245
12.
CruchleyS, LiHY, EvansHE, The role of oxidation damage in fatigue crack initiation of an advanced Ni-based superalloy. Int J Fatigue. 2015;81:265–274. doi: 10.1016/j.ijfatigue.2015.08.016
13.
JiangR, EverittS, GaoN, Influence of oxidation on fatigue crack initiation and propagation in turbine disc alloy N18. Int J Fatigue. 2015;75:89–99. doi: 10.1016/j.ijfatigue.2015.02.007
14.
MillerMD, ReedPAS, JoyceMR, Effect of environment on notch fatigue behaviour in CMSX 4. Mater Sci Technol. 2007;23:1439–1445. doi: 10.1179/174328407X213198
15.
ConnolleyT, StarinkMJ, ReedPAS.Effect of oxidation on high temperature fatigue crack initiation and short crack growth in Inconel 718. Superalloys. 2000;5:435–444.
16.
JiangR, ReedPAS.Critical assessment: oxygen-assisted fatigue crack propagation in turbine disc superalloys. Mater Sci Technol. 2016;32:401–406. doi: 10.1080/02670836.2016.1148227
17.
EverittS, JiangR, GaoN, Comparison of fatigue crack propagation behaviour in two gas turbine disc alloys under creep–fatigue conditions: evaluating microstructure, environment and temperature effects. Mater Sci Technol. 2013;29:781–787. doi: 10.1179/1743284713Y.0000000229
18.
JiangR, BullDJ, ProprentnerD, Effects of oxygen-related damage on dwell-fatigue crack propagation in a P/M Ni-based superalloy: from 2D to 3D assessment. Int J Fatigue. 2017;99:175–186. doi: 10.1016/j.ijfatigue.2017.03.003
19.
EdmondsIM, EvansHE, JonesCN.The role of the γ′ precipitate dispersion in forming a protective scale on Ni-based superalloys at 750°C. Oxid Met. 2010;73:193–206. doi: 10.1007/s11085-009-9173-y
20.
ChenJH, RogersPM, LittleJA.Oxidation behavior of several chromia-forming commercial nickel-base superalloys. Oxid Met. 1997;47:381–410. doi: 10.1007/BF02134783
21.
KvernesIA, KofstadP.The oxidation behavior of some Ni-Cr-Al alloys at high temperatures. Metall Trans. 1972;3:1511–1519. doi: 10.1007/BF02643040
22.
HussainN, ShahidKA, KhanIH, Oxidation of high-temperature alloys (superalloys) at elevated temperatures in air: I. Oxid Met. 1994;41:251–269. doi: 10.1007/BF01080783
23.
MottNF.The theory of the formation of protective oxide films on metals, II. Trans Faraday Soc. 1940;35:472. doi: 10.1039/tf9403500472
24.
KofstadP.High temperature oxidationof metals. New York: Wiley; 1966.
25.
LiuZ, GaoW.Oxidation behavior of cast Ni3Al alloys and microcrystalline Ni3Al + 5% Cr coatings with and without Y doping. Oxid Met. 2001;556:481–504. doi: 10.1023/A:1010307831480
26.
ZengG, LiM, HanJ, Oxidation kinetics of microcrystalline Ni-11.5Cr-4.5Co-0.5Al superalloy sheet fabricated by electron beam physical vapor deposition at 800°C. Mater Lett. 2008;62:289–292. doi: 10.1016/j.matlet.2007.05.036
27.
XiangZD, RoseSR, DattaPK.Low-temperature formation and oxidation resistance of nickel aluminide/nickel hybrid coatings on alloy steels. Scr Mater. 2008;59:99–102. doi: 10.1016/j.scriptamat.2008.02.034
28.
AmaroRL, AntolovichSD, NeuRW, High temperature oxidation and γ′ depletion in the single-crystal superalloy PWA 1484. Mater High Temp. 2016;33:476–488. doi: 10.1080/09603409.2016.1180276
29.
KruppU, OroszR, ChristHJ, Internal nitridation during creep loading of polycrystalline Ni-base superalloys. Mater Sci Forum2004;461–464:37–44.
HaugsrudR.On the high-temperature oxidation of nickel. Corros Sci. 2003;45:211–235. doi: 10.1016/S0010-938X(02)00085-9
32.
CruchleyS, EvansHE, TaylorMP, Chromia layer growth on a Ni-based superalloy: sub-parabolic kinetics and the role of titanium. Corros Sci. 2013;75:58–66. doi: 10.1016/j.corsci.2013.05.016
33.
LukasHL, FriesSG, SundmanB.Computational thermodynamics: the CALPHAD method. Cambridge: Cambridge University Press; 2007.
34.
JamesS, GibalaR.Structure of transient oxides formed on NiCrAI alloys. Metall Trans A. 1983;14:2143–2161. doi: 10.1007/BF02643749
35.
SantosP.Souza, SantosHS, ToledoSP.Standard transition aluminas. Electron Microscopy Studies Mater Res. 2000;3:104–114.
HindamHM, SmeltzerWW.Growth and microstructure of α-Al2O3 on Ni-Al alloys: internal precipitation and transition to external scale. J Electrochem Soc. 1980;127:1622–1630. doi: 10.1149/1.2129964
38.
ZygmuntowiczJ, WiecińskaP, MiazgaA, Characterization of composites containing NiAl2O4 spinel phase from Al2O3/NiO and Al2O3/Ni systems. J Therm Anal Calorim. 2016;125:1079–1086. doi: 10.1007/s10973-016-5357-2
39.
DoychakJ, RuhleM.TEM studies of oxidized NiAl and Ni3Al cross sections. Oxid Met. 1989;31:431–452. doi: 10.1007/BF00666466
40.
PeraldiR, MonceauD, JeanS, High temperature oxidation of high purity nickel: oxide scale morphology and growth kinetics. Mater High Temp. 2003;20:649–655. doi: 10.1179/mht.2003.073
41.
DingQ, ShenZ, XiangS, In-situ environmental TEM study of γ′-γ phase transformation induced by oxidation in a nickel-based single crystal superalloy. J Alloys Compd. 2015;651:255–258. doi: 10.1016/j.jallcom.2015.07.017
42.
LongH, WeiH, LiuY, Effect of lattice misfit on the evolution of the dislocation structure in Ni-based single crystal superalloys during thermal exposure. Acta Mater. 2016;120:95–107. doi: 10.1016/j.actamat.2016.08.035
43.
OropesaA, DrewGL, HardyMC, Effects of oxidation and hot corrosion in a nickel disc alloy. Proceedings of the Eleventh International Symposium on Superalloys; 2008 Sept 14–18; Champion, Pennsylvania.
