Observation of Anisotropy of Creep Fracture Using Small Punch Test for Al-Al4C3 System Produced by Equal Channel Angular Pressing

0364460 - ÚFM 2012 RIV DE eng J - Journal Article
Besterci, M. - Dobeš, Ferdinand - Ballóková, B. - Sülleiová, K. - Kvačkaj, T.
Observation of Anisotropy of Creep Fracture Using Small Punch Test for Al-Al4C3 System Produced by Equal Channel Angular Pressing.
High Temperature Materials and Processes. Roč. 30, č. 3 (2011), s. 205-210. ISSN 0334-6455. E-ISSN 2191-0324
R&D Projects: GA AV ČR 1QS200410502; GA AV ČR IAA200410801
Grant - others:Vega(SK) 2/0025/11
Institutional research plan: CEZ:AV0Z20410507
Keywords : Equal channel angular pressing * small-punch creep * fracture * metal-matrix composites
Subject RIV: JI - Composite Materials
Impact factor: 0.242, year: 2011

The anisotropy of the creep properties and fracture using small punch tests for the Al-Al4C3 system produced by ECAP were analysed in this work. Small punch creep tests under constant force were performed at the temperature of 623 K. It was shown that the fracture results, i.e. time to fracture and deflection at fracture were different in specimens with different orientation with respect to the axis of ECAP deformation. Fracture surface analysis of the tested small punch specimens was conducted. Fractures have transcrystalline ductile character. The fracture dimples are equiaxial as well as elongated in the dependence on strain direction. Fracture dimples are of two categories, the small ones sized from 0.1 to 0.5 mikron and large ones ranging from 3 to 6 mikron.
Permanent Link: http://hdl.handle.net/11104/0199941