Experimental and theoretical approaches on mechanical evaluation of Y123 system by Lu addition

Turkoz, M. B.; Nezir, S.; ÖZTÜRK, Özgür; AŞIKUZUN TOKEŞER, Elif; Yildirim, G.; Terzioglu, C.; Varilci, A.

doi:10.1007/s10854-013-1111-8

Experimental and theoretical approaches on mechanical evaluation of Y123 system by Lu addition

Yazarlar (7)

M. B. Turkoz
Kirikkale Üniversitesi, Türkiye

S. Nezir
Kirikkale Üniversitesi, Türkiye

Prof. Dr. Özgür ÖZTÜRK Kastamonu Üniversitesi, Türkiye

Doç. Dr. Elif AŞIKUZUN TOKEŞER Kastamonu Üniversitesi, Türkiye

G. Yildirim
Bolu Abant İzzet Baysal Üniversitesi, Türkiye

C. Terzioglu
Bolu Abant İzzet Baysal Üniversitesi, Türkiye

A. Varilci
Bolu Abant İzzet Baysal Üniversitesi, Türkiye

Makale Türü	Özgün Makale (SCOPUS dergilerinde yayınlanan tam makale)
Dergi Adı	Journal of Materials Science Materials in Electronics
Dergi ISSN	0957-4522 Wos Dergi Scopus Dergi
Makale Dili	İngilizce	Basım Tarihi	07-2013
Cilt / Sayı / Sayfa	24 / 7 / 2414–2421	DOI	10.1007/s10854-013-1111-8
Makale Linki	https://link.springer.com/content/pdf/10.1007/s10854-013-1111-8.pdf
UAK Araştırma Alanları	Fen Bilimleri ve Matematik

Özet

This work is the continuation of a systematic study on the characterization of the Lu-added Y123 bulk superconducting materials prepared by the nitrate compounds and derivatives at 970 C for 20 h. In this part, the effect of Lu inclusions on the physical and mechanical properties of the Y123 superconductors is examined with the aid of microhardness measurements performed at various applied loads in the range of 0.245-2.940 N. The microhardness measurement results allow us to determine the important mechanical characteristics such as Vickers microhardness, elastic (Young's) modulus, yield strength and fracture toughness values being responsible for the potential industrial applications. It is found that all the properties given above are strongly dependent upon the Lu concentration in the Y123 matrix. Especially, Vickers microhardness (H v ) values of the samples studied in this work are found to suppressed considerably with the enhancement of the Lu addition in the system due to the degradation in the connectivity between superconducting grains. Moreover, the Hv values of the pure Y123 sample are observed to increase with increasing the applied load whereas those of the Lu-doped superconducting materials are obtained to decrease with the load. In other words, the pure sample exhibits the reverse indentation size effect (RISE) behavior while the others obey the indentation size effect (ISE) feature, confirming the degradation in the mechanical properties with the Lu inclusions in the Y123 matrix. In addition, the microhardness measurement results are estimated using the 5 different models such as Meyer's law, proportional sample resistance model, elastic/plastic deformation model, Hays-Kendall (HK) approach and indentation-induced cracking (IIC) model. According to the results obtained from the simulations, of the mechanical analysis models, the Hays-Kendall (HK) approach is determined as the most successful model for the description of the mechanical properties of the Lu-doped superconducting materials (exhibiting the ISE behavior) where both the both the reversible (elastic) and irreversible (plastic) deformations are produced. On the other hand, the IIC model is found to be superior to other approaches for the pure sample (presenting the RISE feature) where the irreversible deformation becomes more and more dominant compared to the reversible deformation. © 2013 The Author(s).

Anahtar Kelimeler

BM Sürdürülebilir Kalkınma Amaçları

Atıf Sayıları
Scopus	21

Experimental and theoretical approaches on mechanical evaluation of Y123 system by Lu addition

Dergi Adı	JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Yayıncı	Springer New York
Açık Erişim	Hayır
ISSN	0957-4522
E-ISSN	1573-482X
CiteScore	5,1
SJR	0,529
SNIP	0,712

Experimental and theoretical approaches on mechanical evaluation of Y123 system by Lu addition

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