TY - JOUR
T1 - Effects of gradient nanostructures on the tribological properties and projectile abrasion during high-speed penetration in AerMet100 steel
AU - Wu, Haijun
AU - Wang, Kehui
AU - Yang, Hui
AU - Shen, Zikai
AU - Cai, Song
AU - Lan, Shuang
AU - Li, Xiuyan
AU - Zhang, Dongya
AU - Zhou, Gang
AU - Zhang, Qingming
N1 - Publisher Copyright:
© 2023 The Authors
PY - 2023/7/1
Y1 - 2023/7/1
N2 - To reduce the mass abrasion of AerMet100 ultra-high strength steel projectiles at increasing velocities, surface mechanical grinding treatment (SMGT) was employed to prepare a gradient nanostructure (GNS) on the AerMet100 surface. The microstructure of the GNS were investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and nanoindentation. It was found that the gradient nano-crystal structure was successfully prepared, and the martensite plate width was reduced to about 30 nm. As the distance from the surface depth increased, the plate size gradually increased, with the depth of the grain refinement layer measuring approximately 300 μm. The microhardness of the GNS AerMet100 was 870 Hv0.025, which was approximately 40% higher than that of the AerMet100 substrate. Additionally, the hardness was observed to decrease with increasing GNS depth. The friction and wear behavior of coarse grained (CG) AerMet100 and GNS AerMet100 were investigated. The results showed that their friction coefficients were similar, but wear volumes of GNS AerMet100 were smaller than those of CG AerMet100, the wear mechanisms of two surfaces were predominantly abrasive and adhesive wear. Furthermore, the projectiles penetration test showed that the mass loss of GNS AerMet100 was significantly lower than that of CG AerMet100 under similar velocity condition. Within the velocity range of 1200–1750 m/s, the degree of erosion and wear loss of the CG AerMet100 and GNS AerMet100 projectile noses increased with increasing penetration velocity, and the wear mechanism was mainly abrasive wear.
AB - To reduce the mass abrasion of AerMet100 ultra-high strength steel projectiles at increasing velocities, surface mechanical grinding treatment (SMGT) was employed to prepare a gradient nanostructure (GNS) on the AerMet100 surface. The microstructure of the GNS were investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and nanoindentation. It was found that the gradient nano-crystal structure was successfully prepared, and the martensite plate width was reduced to about 30 nm. As the distance from the surface depth increased, the plate size gradually increased, with the depth of the grain refinement layer measuring approximately 300 μm. The microhardness of the GNS AerMet100 was 870 Hv0.025, which was approximately 40% higher than that of the AerMet100 substrate. Additionally, the hardness was observed to decrease with increasing GNS depth. The friction and wear behavior of coarse grained (CG) AerMet100 and GNS AerMet100 were investigated. The results showed that their friction coefficients were similar, but wear volumes of GNS AerMet100 were smaller than those of CG AerMet100, the wear mechanisms of two surfaces were predominantly abrasive and adhesive wear. Furthermore, the projectiles penetration test showed that the mass loss of GNS AerMet100 was significantly lower than that of CG AerMet100 under similar velocity condition. Within the velocity range of 1200–1750 m/s, the degree of erosion and wear loss of the CG AerMet100 and GNS AerMet100 projectile noses increased with increasing penetration velocity, and the wear mechanism was mainly abrasive wear.
KW - Gradient nanostructure
KW - High-speed penetration
KW - Mass loss of the projectiles
KW - Surface mechanical grinding treatment
KW - Tribological properties
UR - http://www.scopus.com/inward/record.url?scp=85164998064&partnerID=8YFLogxK
U2 - 10.1016/j.jmrt.2023.06.277
DO - 10.1016/j.jmrt.2023.06.277
M3 - Article
AN - SCOPUS:85164998064
SN - 2238-7854
VL - 25
SP - 5871
EP - 5887
JO - Journal of Materials Research and Technology
JF - Journal of Materials Research and Technology
ER -