R. Dubey, Raja Allavikutty, R. Velmurugan, R. Jayaganthan
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引用次数: 5
摘要
AA 6082-T6铝合金经低温和室温轧制,减薄75%,最终厚度为0.5 mm,并进行高速冲击。由于在航空航天和汽车领域的潜在应用,对变形合金的弹道性能进行了研究。低温和室温轧制样品采用气枪装置进行常规高速冲击,以高于弹道极限的速度发射有鼻弹丸。幻影“V611”高速摄像机用于测量弹丸的初始和剩余速度。进行纳米压痕,将初始样品的硬度与观察到的冲击行为联系起来。使用扫描电子显微镜(SEM)进行了详细的断口学研究,以证实撞击后可能的破坏机制。利用电子背散射衍射(EBSD)和能量色散x射线能谱(EDS)对变形样品的微观结构进行了表征。在本研究中,高速撞击数据与金相观察结果相关联。
Effect of Cryogenic Temperature Rolling on High Speed Impact Behavior of AA 6082 Thin Targets
Aluminium alloy AA 6082-T6 was rolled at cryogenic and room temperatures to final thickness of 0.5 mm after 75% thickness reduction and subjected to high speed impact. The deformed alloy was investigated for its ballistic properties due to potential applications in aerospace and automotive sectors. The cryogenic and room temperature rolled samples were subjected to normal high-speed impact using a gas gun arrangement to shoot nosed projectiles at velocities higher than the ballistic limits. Phantom ‘V611’ high-speed camera was used to measure the initial and residual velocities of the projectile. Nano-indentation was performed to relate hardness of the initial sample with the observed impact behaviour. Detailed fractographic studies were conducted using Scanning Electron Microscopy (SEM) to substantiate the possible failure mechanisms upon impact. Electron Backscatter Diffraction (EBSD) and Energy Dispersive X-ray Spectroscopy (EDS) were used to characterize the microstructure of the deformed samples.
The high speed impact data is correlated with the metallographic observations in this study.