In situ martensitic phase reinforced Fe-Nb-Ni-Mn ultrafine composite with enhanced mechanical properties

T. E. Kim, J. M. Park, Uta Kühn, J. Eckert, W. T. Kim, D. H. Kim

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

An in situ formed martensitic dendrite reinforced Fe-11Nb-10Ni-5Mn ultrafine composite was developed by copper mold casting. This new class of ultrafine composite composed of micrometer-scale martensitic α'-Fe dendrites and ultrafine-scale alternating eutectics exhibits a high fracture strength of 1.6. GPa and a large compressive plasticity up to 10.5%. These excellent mechanical properties originate from the precipitation of the martensitic α'-Fe dendrites containing numerous nanometer-scale laths which are effective to generate multiple shear banding and restrict the rapid propagation of localized shear bands.

Original languageEnglish
Pages (from-to)51-54
Number of pages4
JournalMaterials Science and Engineering A
Volume531
DOIs
Publication statusPublished - 2012 Jan 1

Bibliographical note

Funding Information:
This work was supported by Defense Acquisition Program Administration (DAPA) and Agency for Defense Development (ADD) , and also supported by the Global Research Laboratory Program of Korea Ministry of Science and Technology , and by the Center for Advanced Materials Processing (CAMP) of the 21st Century Frontier R&D Program of the Korea Ministry of Knowledge Economy . T.E. Kim acknowledges the support from the Second Stage of Brain Korea 21 Project in 2010. Stimulating discussions with J.H. Han, M. Stoica, N. Mattern, S. Pauly and S. Scudino are gratefully acknowledged.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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