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1
Content available Biomass as a major component of pellets
Smaga M., Wielgosiński G., Kochański A., Korczak K.
Acta Innovations
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2018
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no. 26
81--92
EN
The article describes the quality parameters of the selected elements of biomass as a potential ecological biofuel. Several selected elements of a type of biomass were tested to determine the calorific value, humidity, content of sulfur and amount of ash produced in burning process. The concept of biomass and the legal aspects of its combustion are described. The research of biomass samples revealed that they may be turned into a high-energy, ecologically solid biofuel. Production of biofuel from the tested biomass does not require any additional binders. Studies have shown that the tested material can also act as a component of composite pellets. The quality parameters of such pellets can be determined with the composite calculator that is described in this article. The article also describes the technical aspects of the pellet production line, which should be applied to produce good-quality pellets from the tested types of biomass.
2
Content available remote Phase transformation and deformation behavior of steels with different content of metastable austenite
Klein M. W., Skorupski R., Smaga M., Beck T.
Engineering Transactions
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2017
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Vol. 65, iss. 1
69--75
EN
In this investigation three steels HCT 780T, AISI 347 and HSDr 600 with different content of metastable austenite and different austenite stability were monotonically loaded at ambient temperature. Using x-ray diffraction and scanning electron microscopy changes in the microstructure were characterized in detail. Hence, the most important mechanisms, which occur by deformation were determined.
3
Content available Quality parameters of the solid fuel produced from coffee grounds and tea grounds
Smaga M.
Acta Innovations
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2016
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no. 20
26--30
EN
The article describes quality parameters of coffee grounds and tea grounds, as main components of a potential sustainable fuel. Samples were tested to determine the calorific value, humidity content, amount of sulfur and ash produced in the subsequent process. The research has shown that biomass consisting of coffee and tea grounds may become a high-energy, sustainable solid fuel. Additionally, the possibility of producing pellets from such materials has been tested and a suitable binder, which would allow forming granules of appropriate size, has been selected.
4
Increase of strength in metastable austenitic steels due to cyclic deformation-induced - martensite formation
Smaga M., Hahnenberger F., Eifler D.
Zeszyty Naukowe. Mechanika / Politechnika Opolska
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2011
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z. 99
55-55
EN
Specimens of the austenitic steels AISI 304, 321 and 348 were investigated in total-strain control fatigue tests in the temperature range from -60°C to 25°C. The fatigue behavior and phase transformation from paramagnetic austenite to ferromagnetic martensitewere investigated by means of stress-strain hysteresis, electrical resistance and magnetic measurements. The influence of the testing temperature on the cyclic deformation behavior and phase transformation is shown in Fig. 1. Due to a decrease in temperature an increase of the stress amplitude occurs. The pronounced cyclic hard- ening can be correlated with two phenomena, an increase of the amount of martensiteand the cyclic hardening of not transformed austenite.
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