期刊
SCRIPTA MATERIALIA
卷 108, 期 -, 页码 136-140出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2015.07.001
关键词
NiAl precipitation; Low-temperature carburization; Low-temperature nitridation; Atom probe tomography; Transmission electron microscopy
类别
资金
- National Science Foundation (NSF) [DMR-1104937]
TInterstitial hardening via low-temperature carburization and nitridation has been studied in 17-7 precipitation-hardening stainless steel. During such interstitial hardening, nanometer-scale NiAl precipitates form in delta ferrite in the bulk, but not in the hardened surface layer. In the carburized ferrite grains, regions of NiAl stoichiometry could be identified, but cannot be identified as regions with a different crystal structure. In the nitrided grains, NiAl particles could neither be detected by corresponding changes in local composition nor by their crystal structure. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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