Temat: siła wyciskania - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Application of the torsion test in calculating the extrusion force
Zastosowanie testu skręcania w obliczeniach siły wyciskania
Autorzy:: Pernis, R.
Bidulska, J.
Kvačarkaj, T.
Pokorny, I.
Powiązania:: https://bibliotekanauki.pl/articles/354146.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: siła wyciskania
test skręcania
stopy aluminium
extrusion force
torsion test
aluminium alloy
Opis:: The paper deals with the calculation of the extrusion force using the results of the torsion test of aluminium alloy EN AW-2014. The mathematical model for the calculation of the extrusion force requires the knowledge of the functional relationship between the yield stress and the temperature, the deformation and the deformation rate. Based on the proposed mathematical model for the calculation of the yield stress, the functional relationship was derived to determine the extrusion force in the hot extrusion of semi-products of aluminium alloy EN AW-2014.
Źródło:: Archives of Metallurgy and Materials; 2011, 56, 1; 81-85
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Impact strength of squeeze casting AlSi13Cu2–CF composite
Autorzy:: Zyska, A.
Konopka, Z.
Łągiewka, M.
Powiązania:: https://bibliotekanauki.pl/articles/946862.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: casting composites
squeeze method
carbon fibers
impact strength
microstructure
kompozyty
metoda wyciskania
włókna węglowe
siła uderzenia
mikrostruktura
Opis:: The paper presents the results of research on microstructure and impact strength of AlSi13Cu2 matrix composite reinforced by Ni-coating carbon fibers (CF) with a volume fraction of 5%, 10% and 15%. The composite suspensions were prepared using by stirring method and subsequently squeeze casted under different pressures of 25, 50, 75 and 100 MPa. As part of the study, fiber distribution in aluminum matrix was evaluated and variation in impact strength of composite as a function of the carbon fibers volume fraction and pressure applied were determined. It has been found that the presence of Ni coating on carbon fibers clearly improves their wettability by liquid aluminum alloy and in combination with the stirring parameters applied, composite material with relatively homogeneous structure can be produced. Charpy's test showed that the impact strength of composite reaches the highest value by carrying out the squeeze casting process at 75 MPa. In the next stage of research, it was found that the impact strength of composites increases with the increase of carbon fibers volume fraction and for 15% of fibers is close to 8 J/cm2. Observations of fracture surfaces have revealed that crack growth in the composites propagates with a quasi-cleavage mechanism. During the creation of the fracture, all fibers arranged perpendicular to its surface were sheared. At the same time, the metal matrix around the fibers deformed plastically creating characteristic ductile breaks. The fracture surface formation through the fibers indicates a cohesive and strong connection of the reinforcement with the matrix. In addition to the phenomena mentioned, debonding the fiber-matrix interfaces and the formation of voids between components were observed on the fracture surface.
Źródło:: Archives of Foundry Engineering; 2020, 20, 2; 49-52
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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