The structure of quaternary iron-based alloy obtained at high and ultrahigh cooling rates

Zhanna G. Kovalevskaya, Evgeny A. Kovalevskiy, Margarita A. Khimich

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

1 Citation (Scopus)

Abstract

Influence of Fe-Si-Al-C alloy cooling rate on its phase composition, structure and microhardness is shown based on metallographic investigations, electron microscopy and x-ray diffraction analysis. It was determined that the structure will change from dendrite to grained, the size of structure elements will decrease, quantity and size of secondary phases precipitations will decrease when cooling rate changes from 103 to 107 K/s. The metastable phases such as primary ferrite, austenite and complex carbides are formed in the range of cooling rate. The volume ratio of main phases changes in favor of primary ferrite with cooling rate increasing. Hardening of the material occurs more than twice. Hardening is due to the interaction of solid-solution hardening, grain boundary hardening and dispersive hardening by secondary phases particles. The hardening maximum is achieved during formation of the alloy in molten pool at electron-beam melting. The alloy in this case contains 80 vol. % of austenite with dendrite-similar structure and precipitations of carbide and silicocarbide phases. It can be assumed than such structure will be formed from the alloy with investigated composition at additive manufacturing.

Original languageEnglish
Title of host publicationAdvanced Materials for Technical and Medical Purpose
EditorsGeorgiy Osokin, Gennady E. Remnev, Valeriy Pogrebenkov, Sergey Psakhie, Nikolay Ratakhin
PublisherTrans Tech Publications Ltd
Pages205-210
Number of pages6
ISBN (Print)9783035710649
DOIs
Publication statusPublished - 2016
EventWorkshop on Advanced Materials for Technical and Medical Purpose, AMTMP-2016 - Tomsk, Russian Federation
Duration: 15 Feb 201617 Feb 2016

Publication series

NameKey Engineering Materials
Volume712
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

ConferenceWorkshop on Advanced Materials for Technical and Medical Purpose, AMTMP-2016
CountryRussian Federation
CityTomsk
Period15.2.1617.2.16

Keywords

  • Cooling rate
  • Electron-beam melting
  • Ferroalloy
  • Microhardness
  • Monolayer
  • Phase composition
  • Plasma spraying
  • Powder
  • Splat
  • Structure

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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