Search results

Filters

  • Journals
  • Autorzy
  • Słowa kluczowe
  • Data
  • Typ

Search results

Number of results: 3
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

Two cognate groups of appellatives appear in the West Germanic languages: OE. līra m. ‘muscle, soft parts of the body’, E. lire ‘fl esh, muscle, brawn’, MDu. liere f. ‘fleshy part of the leg, calf’ (< PGm. *līzán-) and MLG. liese ‘thin skin’, LG. liëse f. ‘layer of fat around the kidneys’ (< PGm. *lī́san-). The words under discussion straight forwardly derive from the Proto-Indo-European archetype *léh1is-on- (gen. sg. *leh1is-n-ós)m. ‘soft, fl eshy part of the body’, which is closely related to the Proto-Indo-European adjective *léh1isos (o-stem) ‘soft, lean (of meat)’, cf. Lith. líesas adj. ‘lean (of meat), thin, non-greasy, slim, skimmed, infertile’, Latv. liẽss adj. ‘lean (of meat), thin, non-greasy, slim, infertile (of soil)’, Gk. λεῖος adj. ‘level, smooth, rubbed, well-ground’. Other nouns derived from the same adjective fre-quently denote ‘soft organs (of the body)’ in Indo-European languages, e.g. Latv. liêsa f. ‘spleen’; Hitt. lēši n. ‘liver’; Arm. leard ‘liver’; Toch. A lyyā (pl.) ‘parts of the body’, Toch. B lyyāsa (pl.) ‘members (of the body)’ (< PIE. *leh1is-).

Go to article

Authors and Affiliations

Krzysztof Tomasz Witczak
Download PDF Download RIS Download Bibtex

Abstract

The paper compares changes in the structure and mechanical properties due to the synergistic effect of alloying elements Zr and Ti. It is assumed that by increasing the content of Zr and Ti in the aluminium alloy, better mechanical properties will be achieved. Paper focuses on description of the differences between the samples casted into the shell mold and the metal mold. Main difference between mentioned molds is a different heat transfer coefficient during pouring, solidification and cooling of the metal in the mold. The main goal was to analyse the influence of Zr and Ti elements and compare the mechanical properties after the heat treatment. Curing and precipitation aging were used during the experiment. The effect of the elements on AlSi7Mg0.3 alloy created differences between the excluded Zr phases after heat treatment. Evaluation of the microstructure pointed to the decomposition of large predominantly needle Zr phases into smaller, more stable formations.
Go to article

Bibliography

[1] Bolibruchová, D., Tillová, E. (2005). Al-Si foundry alloys. Žilina.
[2] Michna, Š., Lukáč, I. (2005). et al. Encyclopedia of aluminum.
[3] Bechný, L. (1990). Foundry metallurgy and technology. ALFA Bratislava.
[4] Bolibruchová, D., Kuriš, M. & Matejka, M. (2019). Effect of Zr on selected properties and porosity of AlSi9Cu1Mg alloy for the purpose of production of high-precision castings. Manufacturing Technology. 19(4), 1213-2489.
[5] Bolibruchova, D., Macko, J. & Bruna, M. (2014). Elimination of negative effect of Fe in secondary alloys AlSi6Cu4 (EN AC 45 000, A 319) by nickel. Archives of Metallurgy and Materials, 59, 717-721
[6] Mahmudi, R., Sepehrband, P. & Ghasemi, H.M. (2006). Improved properties of A319 aluminum casting alloy modified with Zr. Materials Letters. 2606-2610. DOI 10.1016/j.matlet. 2006.01.046
[7] Peng, G., Chen, K., Fang, H. & Chen, S. (2012). A study of nanoscale Al3(Zr,Yb) dispersoids structure and thermal stability in Al–Zr–Yb alloy. Materials Science and Engineering. Volume 535, 311-315.
[8] Sha, G. & Cerezo, A. (2004). Early-stage precipitation in Al−Zn−Mg−Cu alloy (7050). Acta Materialia. 52(15), 4503-4516.
[9] Lü, X., Guo, E., Rometsch, P. & Wang, L. (2012). Effect of one-step and two-step homogenization treatments on distribution of Al3Zr dispersoids in commercial AA7150 aluminium alloy. Transactions of Nonferrous Metals Society of China. 22, 2645-2651. Science Direct.
[10] STN EN 1706. AC–42100. Aluminium alloy for general purpose castings.
[11] Liu, S., Zhang, X.M. & Chen, M.A. & You, J. H. (2008). Influence of aging on quench sensitivity effect of 7055 aluminium alloy. Materials Characterization, 59(1), 53-60.
[12] Pourkia, N., Emamy, M., Farhangi, H. & Seyed, E. (2010). The effect of Ti and Zr elements and cooling rate on the microstructure and tensile properties of a new developed super high-strength aluminium alloy. Materials Science and Engineering A. 527, 5318-5325.
[13] Tillova, E., Chalupova, M. (2009). Structural analysis of Al-Si alloys. Žilina: EDIS ŽU UNIZA.

Go to article

Authors and Affiliations

E. Kantoríková
1
ORCID: ORCID
M. Kuriš
1
R. Pastirčák
1
ORCID: ORCID

  1. Department of Technological Engineering, University of Žilina in Žilina, Univerzitná 8215/1, 010 26 Žilina, Slovakia

Authors and Affiliations

Marek Kuś
1
ORCID: ORCID

  1. Polska Akademia Nauk, Centrum Fizyki Teoretycznej, Al. Lotników 32/46, 02-668 Warszawa

This page uses 'cookies'. Learn more