Microstructural formation in novel Co-base ODS alloys produced by mechanical alloying

Lin Zhang, Xinbo He, Xuanhui Qu, Rafi Ud Din, Hengsan Liu, Dan Li, Hongmin Zhu

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

3 Citations (Scopus)

Abstract

The main focus of this work was to study the microstructural evolution during the sintering and the heat treatment processes. The results indicated that mechanical alloying had induced the formation of supersaturated solid solution in immiscible Co-Al-W alloys, originating mainly from extensive grain boundary region, high dislocation density, and ample point defect. Spinodal decomposition is found to be the dominant mechanism for phase formation. The extremely fine grains (0.5∼3 μm) provide short-circuited diffusion paths for the atomic movement that leads to the spinodal decomposition behavior. γ precipitates were formed by the combination of spinodal decomposition mechanism and the chemical reaction between the decomposed products of CoAl and Co 3W.

Original languageEnglish
Title of host publicationAdvanced Materials
Pages1136-1139
Number of pages4
DOIs
Publication statusPublished - 2012 Jan 1
Externally publishedYes
Event2nd International Conference on Advances in Materials and Manufacturing Processes, ICAMMP 2011 - Guilin, China
Duration: 2011 Dec 162011 Dec 18

Publication series

NameAdvanced Materials Research
Volume415-417
ISSN (Print)1022-6680

Other

Other2nd International Conference on Advances in Materials and Manufacturing Processes, ICAMMP 2011
CountryChina
CityGuilin
Period11/12/1611/12/18

Keywords

  • Cobalt base alloy
  • Mechanical alloying
  • Microstructure
  • Oxide dispersion strengthening
  • Spinodal decomposition

ASJC Scopus subject areas

  • Engineering(all)

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