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中文摘要：
在不同温度下对2024-T351航空铝合金进行了激光喷丸（LP），研究了温度对其表面力学性能的影响规律，并结合微观组织分析得出了激光温喷丸（WLP）对2024-T351航空铝合金的强化机理。结果表明，激光喷丸2024-T351航空铝合金的显微硬度随喷丸温度的升高而增大，弥散强化效应使得120 ℃激光温喷丸在2024-T351航空铝合金表面诱导的残余压应力幅值显著高于常温激光喷丸。
英文摘要：
Laser peening （LP） is conducted on aeronautical 2024-T351 aluminum alloy under different temperatures, and the influence law of temperature on its surface mechanical property is studied. In combination with the microstructure analysis, the strengthening mechanism of 2024-T351 aluminum alloy treated by warm laser peening （WLP） is revealed. The results indicate that the micro-hardness of aeronautical 2024-T351 aluminum alloy increases with the increment of peening temperature. The dispersion strengthening effect makes the amplitude of residual compressive stress induced by 120 ℃-WLP much higher than that by room-temperature LP.
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