Title :
Modification of the structure and properties of heat-resistant alloys with the help of nanopowders of refractory compounds
Author :
Cao Lamei ; Liu Guangxun ; Gu Huaipeng ; Liang Yan ; Cherepanov, A.N. ; Ovcharenko, V.E. ; Drozdov, V.O.
Author_Institution :
Nat. Key Lab. of High Temp. Struct. Mater., Beijing Inst. of Aeronaut. Mater. Beijing, Beijing, China
fDate :
Aug. 29 2012-Sept. 1 2012
Abstract :
Influence of nanodispersed refractory compounds on structure and mechanical properties of heat-resistant alloys K403 and K4169 was investigated. Powders of chemical compounds TiN, TiCN, Y2O3 and their mixtures were used as the modifying agents. The results show that the modifying leads to general improvement of grain and carbide structure of heat-resistant alloys in casts. The grain average size in the cast decreased by 2-3 times, the carbide grains size decreased from 40-60 μm to 10-20 μm. This leads to significant improvement of the life at breaking load and LCF properties of the cast.
Keywords :
aluminium alloys; chromium alloys; cobalt alloys; crystal microstructure; fatigue; grain size; iron alloys; mixing; molybdenum alloys; nanoparticles; nickel alloys; niobium alloys; refractories; titanium alloys; tungsten alloys; carbide structure; cast low cycle fatigue properties; grain size; grain structure; heat-resistant K403 alloys; heat-resistant K4169 alloys; mechanical properties; nanodispersion; nanopowders; powder mixtures; refractory compounds; size 10 Mm to 20 mum; size 40 mum to 60 mum; structural properties; Chemicals; Compounds; Heating; Mechanical factors; Metals; Nanoparticles; Temperature; heat-resistant alloys; improvement; modifying agents; nanopowder; properties;
Conference_Titel :
Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO), 2012 International Conference on
Conference_Location :
Shaanxi
Print_ISBN :
978-1-4673-4588-0
Electronic_ISBN :
978-1-4673-4589-7
DOI :
10.1109/3M-NANO.2012.6472998
