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

fYear

2012

fDate

Aug. 29 2012-Sept. 1 2012

Firstpage

385

Lastpage

388

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/3M-NANO.2012.6472998

Filename

6472998