Title :
Preparation of ODS iron base superalloy by powder metallurgy
Author_Institution :
Dept. of Machinery, Weifang Univ. Weifang Univ., Weifang, China
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;
Conference_Titel :
Mechanic Automation and Control Engineering (MACE), 2011 Second International Conference on
Conference_Location :
Hohhot
Print_ISBN :
978-1-4244-9436-1
DOI :
10.1109/MACE.2011.5987941
