Deformation and failure modes of IN718 alloy plateimpacted by spherical projectile at high velocity

CHEN Yandan; CHEN Xing; LU Yonggang; LIU Tong

doi:10.11883/bzycj-2023-0071

Volume 44 Issue 2

Feb. 2024

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CHEN Yandan, CHEN Xing, LU Yonggang, LIU Tong. Deformation and failure modes of IN718 alloy plateimpacted by spherical projectile at high velocity[J]. Explosion And Shock Waves, 2024, 44(2): 023301. doi: 10.11883/bzycj-2023-0071

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CHEN Yandan, CHEN Xing, LU Yonggang, LIU Tong. Deformation and failure modes of IN718 alloy plateimpacted by spherical projectile at high velocity[J]. Explosion And Shock Waves, 2024, 44(2): 023301. doi: 10.11883/bzycj-2023-0071

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Deformation and failure modes of IN718 alloy plateimpacted by spherical projectile at high velocity

doi: 10.11883/bzycj-2023-0071

CHEN Yandan^{1, 2
,},
CHEN Xing¹,
LU Yonggang¹,
LIU Tong^{3
,
,}

1.
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
2.
The Peac Institute of Multiscale Sciences, Chengdu 610031, Sichuan, China
3.
Chengdu Development Center of Science and Technology, China Academy of Engineering Physics, Chengdu 610299, Sichuan, China

Received Date: 2023-03-01
Rev Recd Date: 2023-11-30

Available Online: 2023-12-26

Publish Date: 2024-02-06

Abstract

Abstract

A series of high-speed ballistic impact tests were conducted on a two-stage light gas gun to investigate the perforation behaviors of Inconel 718 (IN718) superalloy plates. The IN718 targets were prepared with 2 mm thickness, and the 5 mm diameter SS304 spheres were used as projectiles. The impact velocity ranged from 548.2 m/s to 1 067.0 m/s. The shadow graphs of the impact process were captured by using a high-speed camera at a frame rate of 160 000 frames per second. The projectile residual velocities after perforation were then obtained from snapshots and analyzed. The Rechi-Ipson model was employed for the investigated projectile-target combination by fitting the projectile initial velocity-residual velocity relationship, and the ballistic limit velocity 561.0 m/s was then verified. The maximum deformation deflection of the ballistic impact-recovered plates was measured using a height gauge. The optical morphology of the postmortem target was captured, the deformation and failure modes of the target material were observed, while the bullet hole diameters were measured. The experimental results reveal that within the investigated impact velocity range, as the impact velocity increases, the failure mode of the target material changes from tension-dominated failure to tension/shear-dominated failure. The perforation failure mode of the plates is closely associated with the impact velocity. The energy absorption efficiency of the target plates decreases with the increase of projectile’s initial kinetic energy, and it approaches a constant of 0.7. The deformation of the plates decreases with the increase of impact velocity, with the maximum deformation deflection occurring near the ballistic limit. The bullet hole diameters on the front and rear side both increase with the increase of impact velocity, and the bullet hole diameter on the rear side is greater than that on the front side. It is evident that investigating the deformation, failure modes, and ballistic properties of IN718 superalloy under high-speed ballistic impact is essential for its industrial applications.
- IN718 nickel-base superalloy,
- ballistic impact,
- ballistic limit velocity,
- deformation and failure modes,
- perforation

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References(30)

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