Microstructure, Creep and Thermomechanical Fatigue of Novel Solid Solution and Laves Phase Strengthened Cr2O3 and Al2O3 Forming Ferrites for Car Engine Exhaust and Heat Exchanger Systems

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• 作者：Tilmann Beck ; Bernd Kuhn ; T. Eckardt…
• 关键词：Ferritic steel ; Solid solution strengthening ; Laves phase ; Creep ; TMF
• 刊名：Transactions of the Indian Institute of Metals
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：69
• 期：2
• 页码：379-385
• 全文大小：828 KB
• 参考文献：1.Inoue Y and Kikuchi M, Nippon Steel Tech Rep, 88 (2003), p. 63.
  2.Lamp P, Tachtler J, Finkenwirth O, Mukerjee S, and Shaffer S, J Fuel Cells, 3, (2003), p. 146.CrossRef
  3.Pint B A, J Eng Gas Turbines Power 133 (2011).
  4.Miyazaki A, Hirasawa J, and Furukumi O, JFE Tech Rep 4 (2004), p. 61.
  5.Santacreu P O, Revue de Métallurgie 101 (2004), p. 615.CrossRef
  6.Gindorf C, Singheiser L, and Hilpert K, Steel Res 72 (2001), p. 528.
  7.Tedmon C S, J Electrochem Soc, 113 (1966), p. 766.CrossRef
  8.Crofer® 22H ThyssenKrupp VDM Material Data Sheet Nr. 4050; www.​vdmmetals.​com/​downloads/​materialdatenbla​etter/​ .
  9.Hähner P, Affeldt E, and Beck T et al. Validated Code of Practise for Strain Controlled Thermomechanical Fatigue Testing (2006) http://​www.​tmf-workshop.​bam.​de/​en/​tmf_​media/​eur22281en.​pdf .
  10.Nabiran N, PhD thesis, Ruhr Universität Bochum, 2013.
  11.Nabiran N, Weber S, and Theisen W, Procedia Eng 10 (2011), p. 1651.CrossRef
  12.Nabiran N, Klein S, Weber S, and Theisen W, Met Mat Trans 46A (2015), p. 102.CrossRef
  13.Eckardt T, PhD thesis, RWTH Aachen University (2013).
  14.Tjong S C, and Zhu S M, Met Ma Trans A28 (1997), p. 1347.CrossRef
  15.Tjong S C, and Zhang J S, Scripta Met Ma. 32 (1995), p. 1589.CrossRef
  
• 作者单位：Tilmann Beck (2)
  Bernd Kuhn (1)
  T. Eckardt (1)
  L. Singheiser (1)
  
  2. Institute of Materials Science and Engineering, Technische Universität Kaiserslautern, Kaiserslautern, Germany
  1. Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research – IEK-2, Jülich, Germany
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science
  Metallic Materials
  Materials Science, general
  Tribology, Corrosion and Coatings
  
• 出版者：Springer India
• ISSN：0975-1645

文摘

Increasing efficiency of internal combustion engines by downsizing leads to a rise in exhaust gas temperature up to 1000 °C accompanied with higher mechanical loading of exhaust systems, approaching the limits of currently used Cr₂O₃ forming ferrites. Similarly, the conditions in solid oxide fuel cell (SOFC) heat exchanger systems exceed the limits of commercial Al₂O₃ forming heat resistant ferrites with respect to temperature and thermomechanical fatigue (TMF) loading. Aim of the presented work was the development of Cr₂O₃ and Al₂O₃ forming ferrites with improved mechanical strength and TMF properties up to 900–1000 °C. Baseline material was the Crofer® 22H alloy, which should be further hardened by solid solution and Laves phase precipitates. The paper gives an overview of the key results achieved at Research Center Jülich on correlation between microstructure evolution, deformation and lifetime in hot tensile, creep and TMF tests. Increasing Laves phase dissolution temperature elevates short time stability of precipitates and long term stability of the grain structure up to 950 °C. Furthermore, a lower Laves phase content of the Al₂O₃ forming material could be compensated by dynamic strain ageing via Al diffusion resulting in superior high temperature strength, creep behavior and TMF life. Keywords Ferritic steel Solid solution strengthening Laves phase Creep TMF