[Kovove materialy - Metallic materials]
    Sat - September 19, 2020 - 05:16 No. of hits : 1175094 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 52 (2014), Issue 6

Strengthening mechanisms in the nanocrystalline Cu with Al2O3
OROLINOVA, M., ĎURIŠIN, J., ĎURIŠINOVÁ, K., DANKOVÁ, Z., BESTERCI, M., ĎURIŠIN, M., SZABÓ, J.
vol. 52 (2014), no. 6, pp. 395 - 402

Abstract
Nanocrystalline (nc) Cu materials with Al2O3 dispersoid (1 and 5 vol.% Al2O3) were produced using the powder metallurgy (PM) techniques. The effect of reinforcement weight fraction, deformation temperature and annealing temperature (up to 800 °C) on the strength properties and the microstructure was studied. Two strengthening mechanisms were considered at room temperature, strengthening by grain refinements and dispersion strengthening (DS). The strength properties of both nc Cu composites were strongly dependent on deformation temperature and material composition. The main contribution of nanometric Al2O3 particles to the strength of composites at elevated temperatures is probably the strong pinning effect on the grain/crystallite boundaries and preventing of recrystallization process. After annealing at 0.74Tm both composites were characterized by an excellent stability of strength characteristics.

Key words
dispersion strengthened nanocrystalline copper, strengthening mechanisms, strength properties, microstructure

[open article.pdf] Full text (296 KB)

[IMMS SAS]      UMMS SAV - Bratislava (SK) Personal data Protection   ver. 1.7.2      [go to HOME PAGE]
Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


Article abstracts updated: 2020-09-09 09:49      
Articles in press revised: 2020-09-09 12:31     
Full text pdf uploaded: 2020-09-09 09:44    
Information updated: 2020-06-29 17:09   
Code last revised: 2020-06-29 16:48  

© OldSoft, 2004, …, 2020