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Mikrostrukturelle Charakterisierung von PH 13-8 Mo Maraging-Stählen

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Published/Copyright: May 9, 2013
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Practical Metallography
From the journal Practical Metallography Volume 46 Issue 10

Kurzfassung

Maraging-Stähle zeichnen sich durch eine günstige Kombination von hoher Festigkeit bei gleichzeitig akzeptabler Zähigkeit aus. Ihre Mikrostruktur besteht aus einer martensitischen Matrix, in der intermetallische Ausscheidungen eingelagert sind und einem, je nach Wärmebehandlung und Legierungszusammensetzung variierenden, geringen Anteil an Austenit.

In dieser Arbeit werden Methoden und Verfahren angeführt, um die Mikrostruktur von Maraging-Stählen umfassend zu charakterisieren. Neben der ehemaligen Austenitkorngröße, dem Martensit und den intermetallischen Phasen umfasst dies auch den rückumgewandelten Austenit, der während der Wärmebehandlung entsteht. Neben der Beschreibung des Wachstums der Austenitkörner mithilfe des Gesetzes vom isothermen Kornwachstum werden hochauflösende Methoden wie Rückstreuelektronenbeugung (EBSD), Transmissionelektronenmikroskopie (TEM) und Atomsonde (AP) angewendet.

Abstract

Maraging steels are characterized by an excellent combination of high strength coupled with an acceptable level of ductility. Its microstructure consists of a martensitic matrix with intermetallic precipitates and a low amount of austenite, the latter varying according to heat treatment and the composition of the alloy.

In this paper methods and processes for comprehensively characterizing the microstructure of maraging steels are set out. Apart from the prior austenite grain size, the martensite and the intermetallic phases these also relate to the reverted austenite formed during heat treatment. In addition to the description of the growth of austenite grains, with the aid of the law of isothermal grain growth, high-resolution methods such as electron back-scattered diffraction (EBSD), transmission electron microscopy (TEM) and atom probe tomography (APT) are employed.

∗ Ronald Schnitzer,

Dipl.-Ing. Ronald Schnitzer born 1981 in Eisenstadt, Austria, studied material science at the University of Leoben. Now employed as Ph.D. student at the Department of Physical Metallurgy and Materials Testing at the University of Leoben. The topic of his Ph.D. thesis is “Microstructure properties relationship of precipitation hardened steels”.

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Erhalten: 2008-12-17
Angenommen: 2009-7-8
Online erschienen: 2013-05-09
Erschienen im Druck: 2009-10-01

© 2009, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents/Inhalt
  2. Inhalt / Contents
  3. Technical Contributions/Fachbeiträge
  4. Focused Ion Beam (FIB)-basierte Zielpräparation an Transistoren der 70 nm-Generation zur Elektronenholographie
  5. Mikrostrukturelle Charakterisierung von PH 13-8 Mo Maraging-Stählen
  6. The Investigation of Crystallization of a-Si Films Deposited on Different Orientations by Solid Phase Epitaxy Process
https://doi.org/10.3139/147.110032

Articles in the same Issue

  1. Contents/Inhalt
  2. Inhalt / Contents
  3. Technical Contributions/Fachbeiträge
  4. Focused Ion Beam (FIB)-basierte Zielpräparation an Transistoren der 70 nm-Generation zur Elektronenholographie
  5. Mikrostrukturelle Charakterisierung von PH 13-8 Mo Maraging-Stählen
  6. The Investigation of Crystallization of a-Si Films Deposited on Different Orientations by Solid Phase Epitaxy Process
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