TY - JOUR
T1 - Martensitic transformation and shape memory effect at high temperatures in off-stoichiometric Co2VSi Heusler alloys
AU - Jiang, Hengxing
AU - Xu, Xiao
AU - Omori, Toshihiro
AU - Nagasako, Makoto
AU - Ruan, Jingjing
AU - Yang, Shuiyuan
AU - Wang, Cuiping
AU - Liu, Xingjun
AU - Kainuma, Ryosuke
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant No. 51571168 , Grant No. 51471138 ) and the Ministry of Science and Technology of China (Grant No. 2014DFA53040 ). This work was also partially supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS) . The authors would acknowledge Dr. Y.H. Geng for the useful advice about the crystal structure, and are also grateful for careful reading of this manuscript from Dr. Weiwei Xu.
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/10/31
Y1 - 2016/10/31
N2 - Martensitic transformation in off-stoichiometric Co2VSi Heusler alloy was firstly confirmed in this work. The martensite phase presents an ordered 2M non-modulate D022 structure transformed from L21 Heusler structure. In the Co63.5V17.0Si19.5 alloy, the forward and reverse martensitic transformation temperatures are extremely high which reach up to 683 °C and 693 °C, respectively, higher than most known Heusler-type high-temperature shape memory alloys. And results also indicate that the single martensite phase alloy exhibits a good ductility and strength with the compressive strain of over 15% and strength of about 2300 MPa, respectively. What's more, the recoverable strain being maximal to around 3.1% can be obtained at high temperature (750–800 °C) due to its reverse martensitic transformation.
AB - Martensitic transformation in off-stoichiometric Co2VSi Heusler alloy was firstly confirmed in this work. The martensite phase presents an ordered 2M non-modulate D022 structure transformed from L21 Heusler structure. In the Co63.5V17.0Si19.5 alloy, the forward and reverse martensitic transformation temperatures are extremely high which reach up to 683 °C and 693 °C, respectively, higher than most known Heusler-type high-temperature shape memory alloys. And results also indicate that the single martensite phase alloy exhibits a good ductility and strength with the compressive strain of over 15% and strength of about 2300 MPa, respectively. What's more, the recoverable strain being maximal to around 3.1% can be obtained at high temperature (750–800 °C) due to its reverse martensitic transformation.
KW - Co-V-Si Heusler alloy
KW - Martensitic transformations
KW - Mechanical property
KW - Shape memory effect
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U2 - 10.1016/j.msea.2016.08.083
DO - 10.1016/j.msea.2016.08.083
M3 - Article
AN - SCOPUS:84985952073
SN - 0921-5093
VL - 676
SP - 191
EP - 196
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
ER -