TY - JOUR
T1 - Microstructure and high temperature oxidation resistance of Ti-Ni gradient coating on TA2 titanium alloy fabricated by laser cladding
AU - Liu, Fencheng
AU - Mao, Yuqing
AU - Lin, Xin
AU - Zhou, Baosheng
AU - Qian, Tao
N1 - Publisher Copyright:
© 2016 Published by Elsevier Ltd.
PY - 2016/9/1
Y1 - 2016/9/1
N2 - To improve the high temperature oxidation resistance of TA2 titanium alloy, a gradient Ni-Ti coating was laser cladded on the surface of the TA2 titanium alloy substrate, and the microstructure and oxidation behavior of the laser cladded coating were investigated experimentally. The gradient coating with a thickness of about 420-490 μm contains two different layers, e.g. a bright layer with coarse equiaxed grain and a dark layer with fine and columnar dendrites, and a transition layer with a thickness of about 10 μm exists between the substrate and the cladded coating. NiTi, NiTi2 and Ni3Ti intermetallic compounds are the main constructive phases of the laser cladded coating. The appearance of these phases enhances the microhardness, and the dense structure of the coating improves its oxidation resistance. The solidification procedure of the gradient coating is analyzed and different kinds of solidification processes occur due to the heat dissipation during the laser cladding process.
AB - To improve the high temperature oxidation resistance of TA2 titanium alloy, a gradient Ni-Ti coating was laser cladded on the surface of the TA2 titanium alloy substrate, and the microstructure and oxidation behavior of the laser cladded coating were investigated experimentally. The gradient coating with a thickness of about 420-490 μm contains two different layers, e.g. a bright layer with coarse equiaxed grain and a dark layer with fine and columnar dendrites, and a transition layer with a thickness of about 10 μm exists between the substrate and the cladded coating. NiTi, NiTi2 and Ni3Ti intermetallic compounds are the main constructive phases of the laser cladded coating. The appearance of these phases enhances the microhardness, and the dense structure of the coating improves its oxidation resistance. The solidification procedure of the gradient coating is analyzed and different kinds of solidification processes occur due to the heat dissipation during the laser cladding process.
KW - Laser cladding
KW - Nickel based Coating
KW - Oxidation resistance
KW - Titanium alloy
UR - http://www.scopus.com/inward/record.url?scp=84963830527&partnerID=8YFLogxK
U2 - 10.1016/j.optlastec.2016.04.005
DO - 10.1016/j.optlastec.2016.04.005
M3 - 文章
AN - SCOPUS:84963830527
SN - 0030-3992
VL - 83
SP - 140
EP - 147
JO - Optics and Laser Technology
JF - Optics and Laser Technology
ER -