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Journal of Materials Engineering and Performance
Published in: Journal of Materials Engineering and Performance 10/2014

01-10-2014

The Effect of Nb and Ti on Structure and Mechanical Properties of 12Ni-25Cr-0.4C Austenitic Heat-Resistant Steel after Aging at 900 °C for 1000 h

Authors: Vahid Javaheri, Farzad Shahri, Mahyar Mohammadnezhad, Morteza Tamizifar, Masaab Naseri

Published in: Journal of Materials Engineering and Performance | Issue 10/2014

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Abstract

Austenitic heat-resistant steels are particularly suitable for applications where service conditions comprise high temperature. The demand for better performance has motivated developments in these steels. In this work, Ti and Nb were added to austenitic heat-resistant steels, Fe-12Ni-25Cr-0.4C, wt.% simultaneously. Microstructural changes were studied via scanning electron microscopy equipped with energy dispersive spectrum (EDS), optical microscopy, and x-ray diffraction (XRD) in as-cast condition and after aging in 900 °C for 1000 h. Mechanical properties were measured using tensile tests, impact energy, and Vickers hardness. It was observed that by formation of NbC and TiC, the level of fragmentation of the chromium carbides increased, as a positive aspect for mechanical properties. XRD and EDS results show increasing the amount of Ti can inhibit G-phase transformation.
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Metadata
Title
The Effect of Nb and Ti on Structure and Mechanical Properties of 12Ni-25Cr-0.4C Austenitic Heat-Resistant Steel after Aging at 900 °C for 1000 h
Authors
Vahid Javaheri
Farzad Shahri
Mahyar Mohammadnezhad
Morteza Tamizifar
Masaab Naseri
Publication date
01-10-2014
Publisher
Springer US
Published in
Journal of Materials Engineering and Performance / Issue 10/2014
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-014-1009-5

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