Low-cycle fatigue behavior and microstructural evolution of the Fe- 30Mn-4Si-2Al alloy

Ilya Nikulin, Takahiro Sawaguchi, Kazuyuki Ogawa, Kaneaki Tsuzaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Superior fatigue life of 8000 cycles at low-cycle fatigue with a total strain Δε=2% was found in the Fe-30Mn-4Si-2Al high-Mn alloy, as compared to Fe-30Mn-6Si-0Al and Fe-30Mn- 3Si-3Al alloys with fatigue life of 2×103 cycles. Examination of microstructural evolution and cyclic hardening/softening behavior was shown that high fatigue resistance of Fe-30Mn-4Si-2Al alloy associated with delayed development of the deformation induced martensite and inhibited dislocation slip as compared to Fe-30Mn-6Si-0Al and Fe-30Mn-3Si-3Al alloys, respectively. Cyclic strain softening followed by secondary strain hardening was observed in the Fe-30Mn-4Si- 2Al alloy after primary hardening. Primary hardening to about 40 cycles was associated with continuous increase in density of planar dislocations and the development of slip bands. The cyclic softening manifesting as the drop of the stress amplitude in the range of the cycles from 40 to 400 was accompanied by development of deformation induced ε-martensite in place of the slip bands. At the N>400 cycles further increase in the volume fraction of deformation ε-martensite leads to continuous hardening up to the failure. In the presentation we will discuss the details of microstructural evolution during LCF of the Fe-30Mn-4Si-2Al alloy.

Original languageEnglish
Title of host publicationTHERMEC 2013
EditorsB. Mishra, Mihail. Ionescu, T. Chandra
PublisherTrans Tech Publications Ltd
Pages944-949
Number of pages6
ISBN (Print)9783038350736
DOIs
Publication statusPublished - Jan 1 2014
Event8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013 - Las Vegas, NV, United States
Duration: Dec 2 2013Dec 6 2013

Publication series

NameMaterials Science Forum
Volume783-786
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013
CountryUnited States
CityLas Vegas, NV
Period12/2/1312/6/13

All Science Journal Classification (ASJC) codes

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

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