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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/50786
Record Status
Checked
Record Id
50786
Title
In situ neutron diffraction investigation of deformation Twinning and pseudoelastic-like behaviour of extruded AZ31 magnesium alloy
Contributors
O Muránsky (ANSTO) (Pr.Au.)
,
DG Carr (ANSTO)
,
P Sittner (Institute of Physics v.v.i.)
,
EC Oliver (STFC)
Abstract
In situ neutron diffraction has been used to investigate the deformation twinning and untwinning during cyclic uniaxial straining of hydrostatically extruded AZ31 magnesium alloy. The development of the internal stresses and microstructure in the polycrystalline alloy when twinning takes place is explained on the basis of the two pairs of parent {10.0}||, {11.0}|| and twin {00.2}||, {10.3}|| grain families. The experimentally observed pseudoelastic-like behaviour in stress?strain cycles is interpreted as being due to the activation of reversal twinning processes during loading?unloading cycles. It is proposed that the driving force for the observed untwinning is the existence of high tensile stresses in favourably oriented grains which result from significant twinning activity prior to unloading from the peak stress.
Organisation
ISIS
,
ISIS-ENGIN-X
,
STFC
Keywords
SSTD 2009-2010
,
Magnesium
,
Neutron diffraction
,
Pseudoelasticity
,
Twinning¿untwinning
,
Engineering
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
Int J Plasticity
25, no. 6 (2009): 1107-1127.
doi:10.1016/j.ijplas.2008.08.002
2009
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