Journal article
Nano-sized Superlattice Clusters Created by Oxygen Ordering in Mechanically Alloyed Fe Alloys
Scientific reports, v 5(1), 11772
02 Jul 2015
PMID: 26134420
Abstract
Creating and maintaining precipitates coherent with the host matrix, under service conditions is one of the most effective approaches for successful development of alloys for high temperature applications; prominent examples include Ni- and Co-based superalloys and Al alloys. While ferritic alloys are among the most important structural engineering alloys in our society, no reliable coherent precipitates stable at high temperatures have been found for these alloys. Here we report discovery of a new, nano-sized superlattice (NSS) phase in ball-milled Fe alloys, which maintains coherency with the BCC matrix up to at least 913 degrees C. Different from other precipitates in ferritic alloys, this NSS phase is created by oxygen-ordering in the BCC Fe matrix. It is proposed that this phase has a chemistry of Fe3O and a Do(3) crystal structure and becomes more stable with the addition of Zr. These nano-sized coherent precipitates effectively double the strength of the BCC matrix above that provided by grain size reduction alone. This discovery provides a new opportunity for developing high-strength ferritic alloys for high temperature applications.
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Details
- Title
- Nano-sized Superlattice Clusters Created by Oxygen Ordering in Mechanically Alloyed Fe Alloys
- Creators
- Yong-Jie Hu - Pennsylvania State UniversityJing Li - North Carolina State UniversityKristopher A. Darling - DEVCOM Army Research LaboratoryWilliam Y. Wang - Pennsylvania State UniversityBrian K. VanLeeuwen - Pennsylvania State UniversityXuan L. Liu - Pennsylvania State UniversityLaszlo J. Kecskes - DEVCOM Army Research LaboratoryElizabeth C. Dickey - North Carolina State UniversityZi-Kui Liu - Pennsylvania State University
- Publication Details
- Scientific reports, v 5(1), 11772
- Publisher
- NATURE PORTFOLIO
- Number of pages
- 9
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000357267600001
- Scopus ID
- 2-s2.0-84934774995
- Other Identifier
- 991021931899304721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary