TY - JOUR
T1 - Microstructure and thermal expansion properties of invar-type Cu-Zn-Al shape memory alloys
AU - Wang, J. J.
AU - Omori, T.
AU - Sutou, Y.
AU - Kainuma, R.
AU - Ishida, K.
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Science, Sports and Technology of Japan and by the National Natural Science Foundation of China (Grant No. 50244022).
PY - 2004/10
Y1 - 2004/10
N2 - The effects of grain size, volume fraction of the α (fcc) phase in the β(bcc) matrix, and thermal stability on low thermal expansion (LTE) properties of Cu-Zn-Al shape memory (SM) alloys induced by cold rolling were investigated by dilatometry, optical microscopy, differential scanning calorimetry, and electrical conductivity measurements. The alloys with the larger grains showed a superior two-way memory (TWM) effect, wider LTE temperature intervals with excellent thermal stability under 80°C. The α + β two-phase alloys also exhibited a good combination of cold workability and LTE properties. These results suggest that the Cu-Zn-Al alloys with high electrical conductivity of about 20% International Annealed Copper Standard (%IACS) have high potential as a new class of Invar alloys that can be applied in various fields.
AB - The effects of grain size, volume fraction of the α (fcc) phase in the β(bcc) matrix, and thermal stability on low thermal expansion (LTE) properties of Cu-Zn-Al shape memory (SM) alloys induced by cold rolling were investigated by dilatometry, optical microscopy, differential scanning calorimetry, and electrical conductivity measurements. The alloys with the larger grains showed a superior two-way memory (TWM) effect, wider LTE temperature intervals with excellent thermal stability under 80°C. The α + β two-phase alloys also exhibited a good combination of cold workability and LTE properties. These results suggest that the Cu-Zn-Al alloys with high electrical conductivity of about 20% International Annealed Copper Standard (%IACS) have high potential as a new class of Invar alloys that can be applied in various fields.
KW - Cold working
KW - Cu-Zn-Al
KW - Low thermal expansion (LTE)
KW - Martensitic transformation
KW - Shape memory (SM) effect
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U2 - 10.1007/s11664-004-0110-1
DO - 10.1007/s11664-004-0110-1
M3 - Article
AN - SCOPUS:7244236471
SN - 0361-5235
VL - 33
SP - 1098
EP - 1102
JO - Journal of Electronic Materials
JF - Journal of Electronic Materials
IS - 10
ER -