为研究不同应变速率下激光喷丸对6061-T6铝合金力学性能的影响,对标准拉伸试样进行单面和双面激光喷丸强化处理,随后在0.0001～0.1s-1 4种连续应变速率加载条件下,对未喷丸、单面喷丸、双面喷丸3组试样进行了力学性能测试,同时测试了试样表面残余应力,分析了喷丸前后材料表面粗糙度变化及其对延伸率的影响,探讨了激光喷丸后力学性能变化的微观机理。结果表明,抗拉强度(UTS)及屈服强度随应变速率的增加而增大,延伸率随应变速率的增加略微减小;与未处理试样相比,单面激光喷丸后,铝合金的抗拉强度及屈服强度得到小幅提高,延伸率大约降低了1%;双面激光喷丸后,铝合金抗拉强度最大提高了10.8%,屈服强度最大提高了12.5%,延伸率降低了2%左右。激光喷丸区域晶粒得到细化,位错密度得以增加,6061-T6铝合金的力学性能得到改善。 In order to study the effect of laser shot peening on the mechanical properties of 6061-T6 aluminum alloy under different strain rates, one-sided and two-sided laser shot peening of standard tensile specimens was carried out, followed by continuous strain of 0.0001 ~ 0.1s-1 Under the condition of rate loading, the mechanical properties of three groups of samples without shot peening, single shot peening and double shot peening were tested and the residual stress of the sample surface was tested. The variation of surface roughness before and after shot peening On the elongation of the impact of mechanical properties of the laser peening changes micro-mechanism. The results show that the tensile strength (UTS) and yield strength increase with the increase of strain rate, and the elongation decreases slightly with the increase of strain rate. Compared with untreated specimens, Tensile strength and yield strength are slightly increased, the elongation rate decreased by about 1%; double-sided laser peening, the maximum tensile strength of aluminum alloy increased by 10.8%, the maximum yield strength increased by 12.5%, the elongation decreased by 2% about. Laser shot peening grain refinement, dislocation density can be increased, 6061-T6 aluminum alloy mechanical properties are improved.