Preparation of ODS iron base superalloy by powder metallurgy

Author

Cui, Dawei

Author_Institution

Dept. of Machinery, Weifang Univ. Weifang Univ., Weifang, China

fYear

2011

fDate

15-17 July 2011

Firstpage

4245

Lastpage

4248

Abstract

ODS Iron base superalloy powders with Y₂O₃ namoparticles (mass fraction 2.0%) as dispersion phase were prepared by mechanical alloying. After milling for 6h, Y₂O₃ are dispersed into the base powder basically. With increasing the milling time, the grain sizes of powders decrease remarkably, and decrease to below 20nm when milling for 24h. The sintered compact with a relative density 98.1% can be obtained by spark plasma sintering at 1050 °C for 5min from ODS iron base superalloy powders milled for 24h, and its tensile strength and elongation are 1023MPa and 10.6% respectively, showing much higher room-temperature mechanical properties than cold moulded-sintering compact.

Keywords

aluminium alloys; chromium alloys; compaction; disperse systems; elongation; grain size; iron alloys; mechanical alloying; milling; molybdenum alloys; moulding; nanofabrication; nanoparticles; plasma materials processing; powder metallurgy; sintering; superalloys; tensile strength; yttrium compounds; ODS iron-base superalloy; cold moulding; compaction; density; dispersion phase; elongation; grain size; mechanical alloying; milling; nanoparticles; powder metallurgy; room-temperature mechanical properties; spark plasma sintering; temperature 1050 degC; temperature 293 K to 298 K; tensile strength; time 24 h; time 5 min; time 6 h; Alloying; Dispersion; Iron; Milling; Plasmas; Powders; Sparks; iron base superalloy; mechanical alloying; oxide dispersion strengthening (ODS); spark plasma sintering;

fLanguage

English

Publisher

ieee

Conference_Titel

Mechanic Automation and Control Engineering (MACE), 2011 Second International Conference on

Conference_Location

Hohhot

Print_ISBN

978-1-4244-9436-1

Type

conf

DOI

10.1109/MACE.2011.5987941

Filename

5987941