TY - JOUR
T1 - Microstructures and properties of FeCrAlMoSix high entropy alloy coatings prepared by laser cladding on a titanium alloy substrate
AU - Zhang, Zhenkang
AU - Hua, Ke
AU - Cao, Yue
AU - Song, Yuqing
AU - Li, Xiaolin
AU - Zhou, Qing
AU - Wang, Haifeng
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2024/2/29
Y1 - 2024/2/29
N2 - By laser cladding, a FeCrAlMoSix high entropy alloy (HEA) coating (x = 0, 0.05, and 0.10) was produced on Ti6Al4V titanium alloy surface to improve its resistance to the influence of high-temperature fretting wear on Ti6Al4V. The mechanical characteristics, phase composition, and fretting wear resistance of the coating were examined at RT and 400 °C. The findings show that the FeCrAlMoSix coating is made up of a B2 phase and an intermetallic compound μ phase. At RT and 400 °C, increasing the Si concentration significantly enhanced the coating's microhardness. At x = 0.10, the average microhardness of the coated surface was 805 HV, and grain refinement and increase in μ phase were the reasons for the improvement of microhardness. The fretting wear experiment shows that the coating system can reduce wear loss and COF. In addition, at RT and high temperature, increasing the Si element can considerably improve the coating's resistance to fretting wear. However, due to stress concentration, too much μ phase may increase the risk of microcracking in the coating. This work provides a potential method for improving the protection against fretting wear damage on the titanium alloys' surface.
AB - By laser cladding, a FeCrAlMoSix high entropy alloy (HEA) coating (x = 0, 0.05, and 0.10) was produced on Ti6Al4V titanium alloy surface to improve its resistance to the influence of high-temperature fretting wear on Ti6Al4V. The mechanical characteristics, phase composition, and fretting wear resistance of the coating were examined at RT and 400 °C. The findings show that the FeCrAlMoSix coating is made up of a B2 phase and an intermetallic compound μ phase. At RT and 400 °C, increasing the Si concentration significantly enhanced the coating's microhardness. At x = 0.10, the average microhardness of the coated surface was 805 HV, and grain refinement and increase in μ phase were the reasons for the improvement of microhardness. The fretting wear experiment shows that the coating system can reduce wear loss and COF. In addition, at RT and high temperature, increasing the Si element can considerably improve the coating's resistance to fretting wear. However, due to stress concentration, too much μ phase may increase the risk of microcracking in the coating. This work provides a potential method for improving the protection against fretting wear damage on the titanium alloys' surface.
KW - Fretting wear
KW - High entropy alloy coating
KW - Laser cladding
KW - Titanium alloy
UR - http://www.scopus.com/inward/record.url?scp=85182734312&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2024.130437
DO - 10.1016/j.surfcoat.2024.130437
M3 - 文章
AN - SCOPUS:85182734312
SN - 0257-8972
VL - 478
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
M1 - 130437
ER -