The Use of Acoustic Emission and Neutron Diffraction to Reveal the Active Deformation Mechanisms in Polycrystalline Magnesium and Comparison to Theoretical Modeling

2016 ◽  
pp. 213-216
Author(s):  
Jan Čapek ◽  
Kristián Máthis ◽  
Tomáš Krajňák
Keyword(s):  
Acoustic Emission ◽  
Neutron Diffraction ◽  
Theoretical Modeling ◽  
Deformation Mechanisms ◽  
Active Deformation

Influence of the Loading Path on the Deformation Mechanisms of Magnesium Alloys

2016 ◽  
Vol 258 ◽  
pp. 427-431
Author(s):  
Kristián Máthis ◽  
Jan Čapek ◽  
Bjørn Clausen ◽  
Tobias Panzner
Keyword(s):  
Acoustic Emission ◽  
Magnesium Alloy ◽  
Neutron Diffraction ◽  
Magnesium Alloys ◽  
Basal Slip ◽  
Mechanical Tests ◽  
Deformation Mechanisms ◽  
Loading Path ◽  
Dislocation Slip ◽  
Loading Direction

The evolution of deformation mechanisms in randomly textured magnesium alloy during uniaxial and biaxial mechanical tests has been monitored using concurrent application of acoustic emission and neutron diffraction methods. The influence of the loading path on both twinning and dislocation slip is discussed in detail. It is shown that both the twinning and non-basal slip are sensitive to the loading direction.

Neutron Diffraction and Acoustic Emission Study of Mg-Al-Sr Alloy Reinforced with Short Saffil® Fibers Deformed in Compression

2014 ◽  
Vol 777 ◽  
pp. 92-98 ◽  
Author(s):  
Gergely Farkas ◽  
Kristián Máthis ◽  
Petr Lukáš ◽  
Jan Pilch ◽  
Miroslav Vrána ◽  
...  
Keyword(s):  
Residual Stress ◽  
Plastic Deformation ◽  
Acoustic Emission ◽  
Neutron Diffraction ◽  
Residual Stresses ◽  
Deformation Mechanisms ◽  
Ex Situ ◽  
The Matrix ◽  
Main Deformation

Neutron diffraction method has been applied in theex-situinvestigation of the residual stresses in Mg-5wt.%Al-1 wt.%Sr (AJ51) magnesium alloy reinforced with short Saffil® fibers deformed in compression at room temperature. The residual stresses were measured in the axial and radial directions with respect to the load direction. It is shown that in the initial state the tensile stress is present in the matrix phase. Thein-situacoustic emission measurements were performed with the aim to reveal the main deformation mechanisms operating in the particular stages of the plastic deformation. Ex-situ neutron diffractions experiments showed that the tensile axial residual stress in the matrix increases with increasing plastic deformation while the radial residual stress decreases. In situ acoustic emission measurements indicate that the main deformation mechanisms are twinning and glide of bigger dislocation ensembles in the early stages of the compressive deformation while the fibers breakage was observed in the vicinity of the maximum stress.

Neutron diffraction study of the deformation mechanisms of the uranium–7wt.% niobium shape memory alloy

2006 ◽  
Vol 421 (1-2) ◽  
pp. 15-21 ◽  
Author(s):  
D.W. Brown ◽  
M.A.M. Bourke ◽  
R.D. Field ◽  
W.L. Hults ◽  
D.F. Teter ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Diffraction Study ◽  
Neutron Diffraction Study ◽  
Deformation Mechanisms

scholarly journals Deformation mechanisms in an AZ31 cast magnesium alloy as investigated by the acoustic emission technique

2007 ◽  
Vol 462 (1-2) ◽  
pp. 297-301 ◽  
Author(s):  
Enrique Meza-García ◽  
Patrik Dobroň ◽  
Jan Bohlen ◽  
Dietmar Letzig ◽  
František Chmelík ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Magnesium Alloy ◽  
Deformation Mechanisms ◽  
Acoustic Emission Technique ◽  
Cast Magnesium Alloy ◽  
Cast Magnesium

scholarly journals The Influence of Warm Rolling on Microstructure and Deformation Behavior of High Manganese Steels

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 797 ◽  
Author(s):  
Haupt ◽  
Müller ◽  
Haase ◽  
Sevsek ◽  
Brasche ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Warm Rolling ◽  
Deformation Mechanisms ◽  
Thickness Reduction ◽  
High Manganese ◽  
Active Deformation ◽  
High Manganese Steels ◽  
Rolling Deformation ◽  
Manganese Steels

In this work, a Fe23Mn0.3C1Al high manganese twinning-induced plasticity (TWIP) steel is subjected to varying warm rolling procedures in order to increase the yield strength and maintain a notable ductility. A comprehensive material characterization allows for the understanding of the activated deformation mechanisms and their impact on the resulting microstructure, texture, and mechanical properties. The results show a significant enhancement of the yield strength compared to a fully recrystallized Fe23Mn0.3C1Al steel. This behavior is mainly dominated by the change of the active deformation mechanisms during rolling. Deformation twinning is very pronounced at lower temperatures, whereas this mechanism is suppressed at 500 °C and a thickness reduction of up to 50%. The mechanical properties can be tailored by adjusting rolling temperature and thickness reduction to desired applications.

scholarly journals Deformation mechanisms of Mo alloyed FeCoCrNi high entropy alloy: In situ neutron diffraction

2017 ◽  
Vol 127 ◽  
pp. 471-480 ◽  
Author(s):  
Biao Cai ◽  
Bin Liu ◽  
Saurabh Kabra ◽  
Yiqiang Wang ◽  
Kun Yan ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Deformation Mechanisms ◽  
High Entropy Alloy ◽  
High Entropy ◽  
In Situ Neutron Diffraction
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