TY - JOUR
T1 - Effect of Nb/Sn and B Combinatorial Micro-alloying on the Microstructure and Corrosion Properties of As-Cast TiFe-Based Alloys
AU - Li, J. W.
AU - Wang, Z. Y.
AU - Liu, S. X.
AU - Cao, H. S.
AU - Dan, Z. H.
AU - Chang, H.
N1 - Publisher Copyright:
© 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.
PY - 2021
Y1 - 2021
N2 - Effects of Sn, Nb and B micro-alloying on the microstructural refinements and the anti-corrosion properties have been investigated in order to obtain the finer initial cast microstructures of TiFe-based alloy ingots. Three alloys including Ti73.3Fe26.7, Ti73.3Fe24.6Nb2B0.1, Ti73.3Fe24.6Sn2B0.1 alloys have obtained by vacuum suspension melting and the effect of adding Sn, Nb, B on the structure, corrosion properties of Ti–Fe alloys has been explored by surface morphology, X-ray diffraction, grain size statistics, potentiodynamic polarization measurements and contact angle tests. The results show that the grain sizes of TiFe-based alloys can be reduced by chemical compositions designs, and the corrosion resistance can be improved as well. The grain refinements by micro-alloying can be achieved for all regions. The average grain sizes at the edge of cast ingots were confirmed to be 225 μm for Ti73.3Fe26.7 alloy, and the size of 156 μm for Ti73.3Fe24.6Sn2B0.1 alloy and 86 μm for Ti73.3Fe24.6Nb2B0.1 alloy, respectively. The refinement efficiency was 30.8 and 61.8% by the minor addition of Sn/Nb+B elements. According to the polarization curves, the corrosion potential of micro-alloyed TiFe-based alloys positively shifted more than 200 mV. The refinements are possibly ascribed to the low diffusion coefficients of micro-alloyed elements and the inhibition of the rapid growth of the grains.
AB - Effects of Sn, Nb and B micro-alloying on the microstructural refinements and the anti-corrosion properties have been investigated in order to obtain the finer initial cast microstructures of TiFe-based alloy ingots. Three alloys including Ti73.3Fe26.7, Ti73.3Fe24.6Nb2B0.1, Ti73.3Fe24.6Sn2B0.1 alloys have obtained by vacuum suspension melting and the effect of adding Sn, Nb, B on the structure, corrosion properties of Ti–Fe alloys has been explored by surface morphology, X-ray diffraction, grain size statistics, potentiodynamic polarization measurements and contact angle tests. The results show that the grain sizes of TiFe-based alloys can be reduced by chemical compositions designs, and the corrosion resistance can be improved as well. The grain refinements by micro-alloying can be achieved for all regions. The average grain sizes at the edge of cast ingots were confirmed to be 225 μm for Ti73.3Fe26.7 alloy, and the size of 156 μm for Ti73.3Fe24.6Sn2B0.1 alloy and 86 μm for Ti73.3Fe24.6Nb2B0.1 alloy, respectively. The refinement efficiency was 30.8 and 61.8% by the minor addition of Sn/Nb+B elements. According to the polarization curves, the corrosion potential of micro-alloyed TiFe-based alloys positively shifted more than 200 mV. The refinements are possibly ascribed to the low diffusion coefficients of micro-alloyed elements and the inhibition of the rapid growth of the grains.
KW - Chemical compositions design
KW - Corrosion performance
KW - Microstructural refinement
KW - TiFe-based alloys
UR - http://www.scopus.com/inward/record.url?scp=85107227079&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-67958-3_26
DO - 10.1007/978-3-030-67958-3_26
M3 - 文章
AN - SCOPUS:85107227079
SN - 2211-0984
VL - 99
SP - 235
EP - 243
JO - Mechanisms and Machine Science
JF - Mechanisms and Machine Science
ER -