Creep behaviour of unreinforced and reinforced QE22 magnesium alloy: A comparison

0533607 - ÚFM 2021 RIV SK eng J - Článek v odborném periodiku
Sklenička, Václav - Kuchařová, Květa - Svoboda, Milan - Kvapilová, Marie - Dvořák, Jiří - Král, Petr
Creep behaviour of unreinforced and reinforced QE22 magnesium alloy: A comparison.
Kovové materiály. Roč. 58, č. 2 (2020), s. 71-82. ISSN 0023-432X. E-ISSN 1338-4252
Grant CEP: GA MŠMT LM2015069
Institucionální podpora: RVO:68081723
Klíčová slova: magnesium alloy * composite * creep * transfer load * fibre/matrix debonding * fracture
Obor OECD: Materials engineering
Impakt faktor: 1.068, rok: 2020
Způsob publikování: Open access
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A significant improvement in the creep properties of magnesium monolithic alloys at high temperatures can potentially be achieved through processing various magnesium metal matrix composites in which the matrix alloy is strengthened through the introduction of non-metallic fibres or particulates. In this work, a comparison between the creep behaviour and characteristics of an unreinforced high-strength creep-resistant QE22 matrix alloy and a QE22 alloy composite reinforced with 20 vol.% Al2O3 (Saffil) short fibres was performed. Constant stress tensile creep tests were carried out at 423, 473, and 523 K, and the applied stresses ranged from 10 to 200 MPa. The creep strengthening of the composite by reinforcement arises mainly from effective load transfer between matrix and fibres provided that no extensive debonding of the fibre/matrix interfaces or substantial breakage of fibres during creep exposure occur. However, the beneficial effect of reinforcement and the improved creep resistance of the composite is significantly influenced by the creep loading conditions.
Trvalý link: http://hdl.handle.net/11104/0311967