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Correlation between Microstructure and Nanohardness in Advanced Heat-Resistant Steel

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Abstract:

As advanced ferritic/martensitic heat-resistant steels generally have a complex structure consisting of several microstructural units (lath, block, packet, and prior austenite grain), it is very hard to separate the contribution of each microstructural unit (or its each boundary) to the strengthening mechanism in such steels. Here we explore the role of each microstructural unit in strengthening of advanced high Cr steel through nanoindentation experiments performed at different load levels. Nanoindentation results are analyzed by comparing with microstructural observations and discussed in terms of prevailing descriptions of strengthening mechanism.

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Periodical:

Key Engineering Materials (Volumes 326-328)

Pages:

277-280

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.326-328.277

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Online since:

December 2006

Authors:

Jae Il Jang, Sang Hoon Shim, Shinichi Komazaki, Takayuki Sugimoto

Keywords:

Heat Resistant Steel, Lath-Martensitic Structure, Nanoindentation, Strengthening Mechanisms

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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