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Microstructural and Mechanical Characterization of Solidified Austenitic Stainless Steels

Celik A. G., Polat S., Atapek S. H., Haidemenopoulos G. N.

Archives of Foundry Engineering

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2017

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Vol. 17, iss. 3

163--167

EN

Among the family of stainless steels, cast austenitic stainless steels (CASSs) are preferably used due to their high mechanical properties and corrosion resistance. These steels owe their properties to their microstructural features consisting of an austenitic matrix and skeletal or lathy type δ-ferrite depending on the cooling rate. In this study, the solidification behavior of CASSs (304L and 316L grades) was studied using ThermoCalc software in order to determine the solidification sequence and final microstructure during cooling. Theoretical findings were supported by the microstructural examinations. For the mechanical characterization, not only hardness measurements but also tribological studies were carried out under dry sliding conditions and worn surfaces were examined by microscopy and 3D profilometric analysis. Results were discussed according to the type and amount of microstructural features.

2

Strategy Development and Assessment via Scenarios for the Turkish Apparel Industry

Saricam C., Polat S., Cassill N L, Kalaoğlu F.

Fibres & Textiles in Eastern Europe

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2014

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Vol. 22, no. 6 (108)

20--27

EN

The Turkish textile and apparel industry is losing ground as a global player. This forces it to make a careful future analysis to determine the road map ahead and to develop appropriate strategies. Since long term success heavily depends on the development and implementation of strategies that best respond to future requirements for achieving objectives, this study aims to develop strategies for the Turkish apparel industry and determine key strategies among them with a procedure that enables users to make a strategy assessment. For this aim, an approach involving scenario development and strategy appraisal is proposed and applied to the Turkish apparel industry. After describing the general framework of the application, main issues and findings are summarised for the industry and companies acting in the field.

PL

Turecki przemysł tekstylny i odzieżowy traci swoją wiodącą pozycję. Wymusza to staranną analizę przyszłych działań dla określenia kierunku rozwoju i opracowania odpowiednich strategii. Ponieważ długotrwający sukces silnie zależy od rozwoju i wprowadzenia strategii, które najlepiej odpowiadałyby przyszłym wymaganiom dla uzyskania sukcesu w artykule opracowano scenariusze dla przemysłu i dla firm działających w tym przemyśle.

3

Seasonal proximate and fatty acid variations of some seaweeds from the northeastern Mediterranean coast

Polat S., Ozogul Y.

Oceanologia

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2013

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No. 55 (2)

375-391

EN

The seasonal nutritional value of red (Jania rubens, Laurencia papillosa, Spyridia filamentosa and Dasya rigidula) and brown macroalgae (Padina pavonia and Stypopodium schimperi) was evaluated as a dietary supplement for human and animal nutrition based on proximate and fatty acid profiles. The protein content varied from 0.80% (L. papillosa) to 3.41% (J. rubens) of wet weight with the highest values in winter. The highest lipid levels were recorded in S. schimperi (2.03% in spring, 2.16% in summer), the lowest in S. filamentosa (0.08% in spring). The ash content of J. rubens (46.11-51.63%) was significantly higher than that of the other species (2.28-16.57%). Analysis of the fatty acid composition showed that these seaweed species are very rich in n-3 fatty acids.

4

Application of Godet’s Scenario Methodology to the Turkish Apparel Industry

Saricam C., Kalaoğlu F., Polat S., Cassill N. L.

Fibres & Textiles in Eastern Europe

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2013

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Vol. 21, no. 2 (98)

7--12

EN

The value of Turkish textile and apparel trade has shown steady growth since the 1980s, making this one of the indispensable sectors for the Turkish economy. However, especially after 2000, the dramatic effects of globalisation and liberalisation began to be felt in world textile and apparel trade, subsequently changing the dynamics. Companies working in the textile business were compelled to make strategic adjustments in order to determine their future opportunities. Scenario planning enables managers to better analyse the future environment than when using other techniques. In this study, Godet’s scenario planning methodology was applied to the Turkish apparel industry in order to determine future perspectives the industry would face.

PL

Obroty tureckiego handlu tekstylno-odzieżowego wykazywały stały wzrost od 1980 roku, co czyni go jednym z niezbędnych sektorów tureckiej gospodarki. Jednak, zwłaszcza po roku 2000, dramatyczne skutki globalizacji i liberalizacji zaczęły być odczuwalne na światowych rynkach branży tekstylno-odzieżowej, zmieniając jej dynamikę. Firmy działające w sektorze tekstylnym zostały zmuszone do podejmowania strategicznych zmian w celu określenia ich przyszłych możliwości. Planowanie scenariuszowe umożliwia menedżerom lepiej przeanalizować przyszłe środowiska, niż przy użyciu innych technik. W tym badaniu metoda scenariuszowa Godeta została zastosowana dla tureckiego przemysłu odzieżowego w celu określenia jego przyszłych perspektyw.