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The Brittleness Of Zn-Cu-Ti Sheet Alloys

100%
Boczkal G., Mikułowski B.
Archives of Metallurgy and Materials
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2015
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issue 3
2
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Work Hardening of Magnesium Single Crystals Deformed to Stage~B at Room Temperature

100%
Sułkowski B., Mikułowski B.
Acta Physica Polonica A
|
2012
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vol. 122
|
issue 3
528-531
EN
Magnesium single crystals of purity (99.8 wt%) deformed to stage B on the work-hardening curve at the temperature of 293 K and at a strain rate of 10^{-3} s^{-1} were investigated. The modified Bridgman method was used to obtain the crystals of the preferred orientation of (0001)〈11\overline{2}0〉 as primary slip system. By using the method based on the experimental gradient matrix, the activity of slip systems was obtained in magnesium single crystals deformed to shear strain 1.2 γ, where well developed stage B of work hardening was observed. It was shown that primary (0001)〈11\overline{2}0〉 slip system was dominant in the whole investigated range of the examined deformation. The observation and analysis of etch pits on the {\overline{1}2\overline{1}0} plane showed the heterogeneous distribution of dislocations formed during deformation into walls of dislocations perpendicular to the (0001) slip plane. The suggested model of work hardening of magnesium single crystals, which is worth taking into consideration, shows the influence of the long-range stress field derivating from the groups of dislocations arranged in dislocation walls.
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Structure And Properties of the Centrifugally Cast High-Alloyed (25Cr35NiNbTi) Steel after Long-Time Operation in Steam Reforming

81%
Mikułowski B., Zapała R., Głownia J., Wilk P.
Archives of Metallurgy and Materials
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2013
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issue 3
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