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Study of Microstructural Evolution of X4CrNiSiTi14-7 During Thermal Aging

Dedicated to Professor H. P. Degischer on the occasion of his 75th birthday
  • Shahroz Sakhawat , Ahmad Falahati and Maria Domankova
Published/Copyright: May 5, 2013
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Practical Metallography
From the journal Practical Metallography Volume 47 Issue 9

Abstract

Microstructural evolution during aging treatment in a high tensile precipitation hardening stainless steel (X4CrNiSiTi14-7) has been investigated. Matrix consists of martensitic structure and the combined addition of Si and Ti causes an intermetallic phase type Ni16Ti6Si7 that precipitates with-in grains and enhance precipitation strengthening. This material shows a good combination of high strength and ductility.

Light-Optical microscopy, electron back scattered diffraction, transmission electron microscopy and X-ray diffraction analysis have been used to study the microstructural evolution during aging. It has been found that precipitations of various kinds are taking place during aging treatments including nm-scaled G-phase and various carbides. Higher aging temperatures lead to reverse transformation of martensite to austenite.

Kurzfassung

Untersucht wurde die mikrostrukturelle Entwicklung während einer Alterungsbehandlung an einem hochfesten, ausscheidungshärtenden nichtrostenden Stahl (X4CrNiSiTi14-7). Die Matrix setzt sich aus einer martensitischen Struktur zusammen, und die kombinierte Zugabe von Si und Ti ruft eine intermetallische Phase des Typs Ni16Ti6Si7 hervor, die sich innerhalb der Körner abscheidet und die Ausscheidungsverfestigung verstärkt. Dieses Material zeichnet sich durch eine gute Mischung aus hoher Festigkeit und Duktilität aus.

Um die mikrostrukturelle Entwicklung während der Alterung zu untersuchen, wurden Lichtmikroskopie, Rückstreuelektronenbeugung, Transmissionselektronenmikroskopie und die Röntgenbeugungsanalyse eingesetzt. Es konnte festgestellt werden, dass es während der Alterungsbehandlungen zu Ausscheidungen verschiedener Art kommt, darunter eine G-Phase im nm-Maßstabsbereich und verschiedene Karbide. Höhere Alterungstemperaturen führen zu einer Rückumwandlung des Martensits zu Austenit.

∗

Shahroz Sakhawat is a PhD student in the Institute of Materials Science and Technology at the Technical University of Vienna, Austria. Her research interests include stainless steels, precipitation hardening and TEM.

Ahmad Falahati Date of birth: 03.12.1956, Citizenship: Austria PhD thesis on short fiber reinforced high speed steels, diploma work on foaming of steel, formerly managing director of a technical inspection company (Sinntec QM GmbH), since 2005 senior researcher in the institute of Material Science and Technology-Vienna University of Technology.

References/Literatur

[1] Hsiao, C.N.;Chiou, C.S.;YangJ.R.; Mat. Chem. and Phys.74(2002) 134–142.10.1016/S0254-0584(01)00460-6Search in Google Scholar

[2] Ping, D.H. et. al; Mat. Sci. and Eng. A394 (2005) 285–29510.1016/j.msea.2004.12.002Search in Google Scholar

[3] Murata, Y.;Ohashi, S.;Uematsu, Y.; ISIJ Int.. Vol 33 (1993). No. 7, pp. 711–72010.2355/isijinternational.33.711Search in Google Scholar

[4] Nawrocki, J.G. et al.; Scripta Materialia45 (2001) 139–144.10.1016/S1359-6462(01)01008-9Search in Google Scholar

[5] Szczotok, A.;Sozanska, M.; Prakt. Metallogr.46 (2009) 9, 454–468.10.3139/147.110001Search in Google Scholar

[6] Kral, M.V. et al.; Prakt. Metallogr.46 (2009) 9, 469–482.Search in Google Scholar

[7] Jia, N. et al.; Mater. Sci. Eng. A (2008).Search in Google Scholar

[8] AlDawood, et. al.; Mat. Sci. and Tech. Mar.2004 Vol. 2036310.1179/026708304225011135Search in Google Scholar

[9] Murayama, M.;Katayama, Y.;Hono, K.; Metallurgi. and Mat. Trans. A, Vol 30A, Feb. 1999, 345–353.10.1007/s11661-999-0323-2Search in Google Scholar

[10] Hoshino, K.;Utsunomya, T.; ISIJ1986, 249–256Search in Google Scholar

Received: 2010-2-6
Accepted: 2010-3-15
Published Online: 2013-05-05
Published in Print: 2010-09-01

© 2010, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents/Inhalt
  2. Inhalt / Contents
  3. Editorial
  4. Co-Editor Letter / Degischer Special Issue
  5. Technical Contributions/Fachbeiträge
  6. 3D Interpenetrating Hybrid Network of Rigid Phases in an AlSi10Cu5NiFe Piston Alloy
  7. 3D Microstructural Study of AlSi8Mg5 Alloy by FIB-Tomography
  8. Study of Microstructural Evolution of X4CrNiSiTi14-7 During Thermal Aging
  9. Microstructural Features of AZ31 Deformed at High Temperatures
https://doi.org/10.3139/147.110091

Articles in the same Issue

  1. Contents/Inhalt
  2. Inhalt / Contents
  3. Editorial
  4. Co-Editor Letter / Degischer Special Issue
  5. Technical Contributions/Fachbeiträge
  6. 3D Interpenetrating Hybrid Network of Rigid Phases in an AlSi10Cu5NiFe Piston Alloy
  7. 3D Microstructural Study of AlSi8Mg5 Alloy by FIB-Tomography
  8. Study of Microstructural Evolution of X4CrNiSiTi14-7 During Thermal Aging
  9. Microstructural Features of AZ31 Deformed at High Temperatures
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