Mechanical properties and microstructural response of 2A14 aluminum alloy subjected to multiple laser shock peening impacts
Mechanical properties and microstructural response of 2A14 aluminum alloy subjected to multiple laser shock peening impacts
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多次激光喷丸冲击下2A14铝合金的力学性能和显微组织响应
DOI：
10.1016/j.vacuum.2019.03.058
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发表时间：
2019
期刊：
影响因子：
4
通讯作者：
Jiangtao Wang
中科院分区：
文献类型：
--
作者：
Jian Wang;Yalin Lu;Dongshuai Zhou;Lingyan Sun;Li Xie;Jiangtao Wang
对2A14铝合金多次激光冲击后的力学性能和组织演变进行了详细的分析。通过拉伸试验和显微硬度测试分析了复合材料的力学性能，并通过扫描电镜（SEM）和透射电镜（TEM）分析了复合材料的微观结构。实验结果表明，随着激光冲击次数的增加，2A14铝合金的强度和显微硬度均有所提高。经3次激光冲击处理后，试样的抗拉强度和表面硬度分别达到525 MPa和262 HV，比未处理试样分别提高了20.69%和72.37%。在3次冲击后的试样表层也发现了高密度的位错结构。就2A14铝合金的微观组织特征而言，其力学性能的提高主要归因于多次激光冲击诱导的贝内的微观组织演变。
Detailed analysis on mechanical properties and microstructural evolution of 2A14 aluminum alloy subjected to.multiple Laser Shock Peening (LSP) impacts has been conducted. The tensile test and in-depth microhardness.measurement were utilized in analyzing the mechanical properties, while Scanning Electron Microscopy (SEM).and Transmission Electron Microscopy (TEM) examinations were also conducted to characterize the micro-.structural response. Experimental results demonstrated that the strength and micro-hardness of 2A14 aluminum.alloy were improved with increasing the numbers of LSP impacts. After 3 LSP impacts, the tensile strength, and.surface micro-hardness reached 525 MPa and 262 HV respectively, which received an increase of 20.69% and.72.37% compared with the untreated sample. And high-density of dislocation structures were also found in.surface layer of the specimen subjected to 3 LSP impacts. With regards to the microstructural characteristics of.2A14 aluminum alloy, the enhancement of its mechanical properties was mainly contributed to the beneficial.microstructure evolution induced by multiple LSP impacts.