期刊论文

Simulation and experimental research on effect of shot peening on surface roughness of 7075-T651 aluminum alloy

Liao, K.

中文

材料热处理学报

1009-6264

2021

42

6

172-180

10.13289/j.issn.1009-6264.2020-0502

国家自然科学基金（51475483）； 湖南省重点研发计划（2018NK2065,2019NK2022）；

本校为第一机构

为探究不同喷丸工艺参数对7075-T651铝合金表面粗糙度（Ra）的影响,首先利用ANSYS/LS-DYNA建立了三维动态喷丸有限元模型,然后根据Ra离散化计算式采集模型节点位移数据,获得了不同覆盖率、喷射距离、弹丸直径和喷射压力下的表面粗糙度值,再结合表面粗糙度、硬度和应力测试结果,分析不同工艺参数对7075-T651铝合金表面粗糙度和表面硬度的影响。结果表明:合金表面粗糙度的模拟计算值和实验值的最大偏差为11.3%,差值仅为0.59μm,且合金硬度和表面粗糙度的变化趋势具有一致性,论证了模型计算结果的准确性与可靠性。结合应力云图和表面粗糙度结果发现,在同等表面粗糙度下,采用"大丸粒+小压力"喷丸试样...

In order to explore the effect of different shot peening process parameters on surface roughness (Ra) of 7075-T651 aluminum alloy, firstly, a 3d dynamic shot peening finite element model (FEM) was established using the ANSYS/LS-DYNA, then, according to the displacement data of the model nodes collected by Ra discretization calculation, the surface roughness values under different coverage rates, shot distance, shot diameter and pressure were obtained. Combined with the surface roughness, hardness and stress test results, the effects of differen...