TY - JOUR
T1 - Si content dependence on shape memory and tensile properties in Fe-Mn-Si-C alloys
AU - Koyama, M.
AU - Sawaguchi, T.
AU - Tsuzaki, K.
N1 - Funding Information:
This work was supported by the Japan Science and Technology Agency (JST) . The Materials Manufacturing and Engineering Station and Materials Analysis Station at the National Institute for Materials Science produced the samples and analyzed the chemical compositions for this work. The authors would like to acknowledge Dr. Fuxing Yin and Dr. Takehiko Kikuchi for the discussions during the experiments.
PY - 2011/3/15
Y1 - 2011/3/15
N2 - Fe-17Mn-xSi-0.3C alloys (x= 0, 2, 4, 6. mass%) were used to investigate the influence of Si on the tensile properties and the shape recovery strain. We considered three kinds of tensile properties: critical stress for e{open}-martensitic transformation, critical stress for dislocation gliding, and work hardening rate. A significant increase in the shape recovery strain was obtained in the 6%Si added alloy, when the alloys were heated to 873. K after a pre-straining of 8% in tension. The critical stresses for both the e{open}-martensitic transformation and the dislocation gliding increased with an increase in Si content from 0 to 4% but were similar in the 4%Si and 6%Si added alloys. However, the work hardening rate between the 4%Si and 6%Si added alloys was significantly different and was much smaller in the 6%Si added alloy. Hence, a 6%Si addition suppresses the plastic deformation due to the dislocation gliding through the decrease in the work hardening rate along with the solution hardening. As a result, e{open}-martensitic transformation occurs as the predominant deformation mode at smaller strains and improves the shape recovery strain.
AB - Fe-17Mn-xSi-0.3C alloys (x= 0, 2, 4, 6. mass%) were used to investigate the influence of Si on the tensile properties and the shape recovery strain. We considered three kinds of tensile properties: critical stress for e{open}-martensitic transformation, critical stress for dislocation gliding, and work hardening rate. A significant increase in the shape recovery strain was obtained in the 6%Si added alloy, when the alloys were heated to 873. K after a pre-straining of 8% in tension. The critical stresses for both the e{open}-martensitic transformation and the dislocation gliding increased with an increase in Si content from 0 to 4% but were similar in the 4%Si and 6%Si added alloys. However, the work hardening rate between the 4%Si and 6%Si added alloys was significantly different and was much smaller in the 6%Si added alloy. Hence, a 6%Si addition suppresses the plastic deformation due to the dislocation gliding through the decrease in the work hardening rate along with the solution hardening. As a result, e{open}-martensitic transformation occurs as the predominant deformation mode at smaller strains and improves the shape recovery strain.
UR - http://www.scopus.com/inward/record.url?scp=79151471990&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79151471990&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2010.12.065
DO - 10.1016/j.msea.2010.12.065
M3 - Article
AN - SCOPUS:79151471990
SN - 0921-5093
VL - 528
SP - 2882
EP - 2888
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
IS - 6
ER -