TY - JOUR
T1 - Two-way shape memory effect induced by bending deformation in ductile Cu-Al-Mn alloys
AU - Omori, Toshihiro
AU - Wang, Jijie
AU - Sutou, Yuji
AU - Kainuma, Ryosuke
AU - Ishida, Kiyohito
PY - 2002/7
Y1 - 2002/7
N2 - Martensitic transformation temperatures and the two-way shape memory effect (TWME) in ductile Cu-Al-Mn alloys deformed at room temperature were investigated using differential scanning calorimetry (DSC) and the bending test. The Msand Af temperatures were found to increase slightly with increasing degree of pre-deformation, while the Mf and As temperatures decreased. The TWME is strongly influenced by the Ms temperature and the grain size of the specimens, i.e., the highest degree of TWME is always obtained in the specimens with Ms ≈ -100°C and the TWME increases with increasing ratio of grain size to specimen width, where the maximum value of TWME = 3.2% was obtained in the present study. In situ observation of the surface relief at several temperatures on the deformed specimens was also performed and it was found that some restricted martensite variants grow and shrink with temperature change without the typical self-accommodation microstructure in the specimens with large TWME.
AB - Martensitic transformation temperatures and the two-way shape memory effect (TWME) in ductile Cu-Al-Mn alloys deformed at room temperature were investigated using differential scanning calorimetry (DSC) and the bending test. The Msand Af temperatures were found to increase slightly with increasing degree of pre-deformation, while the Mf and As temperatures decreased. The TWME is strongly influenced by the Ms temperature and the grain size of the specimens, i.e., the highest degree of TWME is always obtained in the specimens with Ms ≈ -100°C and the TWME increases with increasing ratio of grain size to specimen width, where the maximum value of TWME = 3.2% was obtained in the present study. In situ observation of the surface relief at several temperatures on the deformed specimens was also performed and it was found that some restricted martensite variants grow and shrink with temperature change without the typical self-accommodation microstructure in the specimens with large TWME.
KW - Copper-aluminum-manganese
KW - Grain size
KW - Martensitic transformation
KW - Two-way shape memory effect (TWME)
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U2 - 10.2320/matertrans.43.1676
DO - 10.2320/matertrans.43.1676
M3 - Article
AN - SCOPUS:0036631265
SN - 1345-9678
VL - 43
SP - 1676
EP - 1683
JO - Materials Transactions
JF - Materials Transactions
IS - 7
ER -