scholarly journals Internal Friction in Magnesium Alloys and Magnesium Alloys- Based Composites

10.5772/67028 ◽  
2017 ◽  
Author(s):  
Zuzanka Trojanová ◽  
Peter Palček ◽  
Pavel Lukáč ◽  
Mária Chalupová
Keyword(s):  
Internal Friction ◽  
Magnesium Alloys

scholarly journals Elastic Properties and Internal Friction of Two Magnesium Alloys at Elevated Temperatures

2011 ◽  
Author(s):  
M. Freels ◽  
P. K. Liaw ◽  
E. Garlea ◽  
J. S. Morrell ◽  
M. Radiovic
Keyword(s):  
Internal Friction ◽  
Magnesium Alloys ◽  
Elastic Properties ◽  
Elevated Temperatures

scholarly journals Amplitude Dependent Internal Friction in Strained Magnesium Alloys of AZ Series

Crystals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 608
Author(s):  
Milan Uhríčik ◽  
Zuzana Dresslerová ◽  
Peter Palček ◽  
Mária Chalupová ◽  
Zuzanka Trojanová ◽  
...  
Keyword(s):  
Internal Friction ◽  
Quality Factor ◽  
Magnesium Alloys ◽  
Strain Amplitude ◽  
Room Temperature ◽  
Dislocation Line ◽  
Maximum Strain ◽  
Critical Amplitude ◽  
Solute Atoms

Amplitude dependent internal friction (ADIF) was measured in three AZ magnesium alloys. Two types of experiments were performed: ADIF was measured step by step with the increasing strain amplitude and ADIF was measured after predeformation of samples in torsion. All experiments were done at room temperature. The quality factor was used as a measure of internal friction (IF). The quality factor decreased in the region of smaller amplitudes, and approaching some critical amplitude, εcr, rapidly increased. This critical amplitude increased with increasing maximum strain amplitude and predeformation of samples up to ~6%. Such behavior can be explained by considering mobile solute atoms, which may migrate along the dislocation line in the region of smaller amplitudes and perpendicular to the dislocation line in the region of higher amplitudes. A competition between dragging and depinning of solute atoms with dislocation lines may very well explain the measured dependencies.

Influence of Thermomechanical Treatment on the Damping Capacity of Selected Magnesium Alloys

2016 ◽  
Vol 879 ◽  
pp. 1992-1997
Author(s):  
Zuzanka Trojanová ◽  
Peter Palček ◽  
Mária Chalupová ◽  
Pavel Lukáč ◽  
Uwe Arlic
Keyword(s):  
Internal Friction ◽  
Magnesium Alloys ◽  
Significant Influence ◽  
Temperature Scale ◽  
Rolling Texture ◽  
Az31 Alloy ◽  
Dislocation Motion ◽  
Damping Capacity ◽  
Amplitude Dependence ◽  
Increasing Temperature

In the paper the temperature and amplitude dependence of internal friction in the AZ31, AZ63 and AZ91 alloys is reported. A rapid increase in internal friction with increasing temperature was estimated. Internal friction peaks were observed in AZ63 and AZ91 alloys. Position and height of the peaks in the temperature scale depends on the heating rate. Simultaneously, microstructural observations were performed in the selected points of the temperature scale. The amplitude dependence of internal friction in an AZ31 alloy, prepared by rolling, was measured. A significant influence of the rolling texture has been estimated. Main mechanisms of internal friction are connected with precipitation, dislocation motion and twinning.

Elasticity and internal friction of magnesium alloys at room and elevated temperatures

2018 ◽  
Vol 53 (11) ◽  
pp. 8545-8553 ◽  
Author(s):  
Michaela Janovská ◽  
Peter Minárik ◽  
Petr Sedlák ◽  
Hanuš Seiner ◽  
Michal Knapek ◽  
...  
Keyword(s):  
Internal Friction ◽  
Magnesium Alloys ◽  
Elevated Temperatures

Influence of Cyclic Loading on the Internal Friction Measured on Magnesium Alloys AZ31, AZ61 and AZ91

2020 ◽  
Vol 405 ◽  
pp. 318-323
Author(s):  
Milan Uhríčik ◽  
Zuzana Dresslerová ◽  
Peter Palček ◽  
Tatiana Oršulová ◽  
Patrícia Hanusová
Keyword(s):  
Cyclic Loading ◽  
Internal Friction ◽  
Magnesium Alloys ◽  
Resonance Method ◽  
Experimental Measurements ◽  
Dissipation Of Energy ◽  
Friction Measurements ◽  
Continuous Excitation

The article is aimed on the analysis of the influence of cyclic loading on the internal friction measured on magnesium alloys, especially AZ31, AZ61 and AZ91, after homogenization annealing. Microplastic processe and dissipation of energy within the alloys are evaluated and investigated by internal friction measurements. In experimental measurements resonance method was used, which is based on continuous excitation of oscillations of specimens. Measurements were performed at final excitation voltages of 5 V, 6 V and 7 V.

Internal friction in a martensitic high-carbon steel

2001 ◽  
Vol 81 (12) ◽  
pp. 2797-2808
Author(s):  
Rustem Bagramov, Daniele Mari, Willy Benoi
Keyword(s):  
Carbon Steel ◽  
Internal Friction ◽  
High Carbon Steel ◽  
High Carbon

A simple system to measure internal friction and creep

1992 ◽  
Vol 2 (9) ◽  
pp. 1779-1786
Author(s):  
A. M. Bastawros ◽  
M. Z. Said
Keyword(s):  
Internal Friction ◽  
Simple System
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