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题名: 激光冲击强化对6082铝合金机械性能的影响
其他题名: Effect of Laser Peening on Mechanical Properties of 6082 Aluminum Alloy
作者: 乔红超
作者部门: 装备制造技术研究室
关键词: 激光器 ; 激光冲击强化 ; 铝合金 ; 显微硬度 ; 微结构 ; 残余应力
刊名: 激光与光电子学进展
ISSN号: 1006-4125
出版日期: 2015
卷号: 52, 期号:6, 页码:166-172
收录类别: CSCD
产权排序: 1
项目资助者: 国家863计划(2012AA041310)
摘要: 为研究激光冲击强化对6082铝合金性能的影响,利用波长为1064 nm、脉宽为15 ns、脉冲能量为08 J的Nd∶YAG激光器对6082铝合金进行工艺试验研究,采用表面粗糙度仪、显微硬度计、X射线应力分析仪和疲劳试验机分别对试件的表面粗糙度、显微硬度、残余应力和疲劳寿命进行测量。实验结果表明:激光能量为7 J,冲击4次时,在试件表面引入了坑穴和褶皱等微结构,使得表面形貌高低不平,粗糙度提高了2倍左右,使得表层材料发生塑性变形以及加工硬化,表面显微硬度提高了43%左右,最大残余压应力达-261 MPa,硬化层深度达700 mm左右,疲劳寿命提高了6.8倍左右,即激光冲击强化能够极大地改善60...
英文摘要: In order to study the effects of laser peening on properties of 6082 aluminum alloy, 6082 aluminum alloy coupons are treated by Nd∶YAG laser system with the wavelength of 1064 nm, pulse width of 15 ns and pulse energy of 08 J. Surface roughness, micro- hardness, residual stress and fatigue life with different laser peening parameters are tested by roughness tester, micro- hardness tester, X- ray diffraction machine and fatigue machine, respectively. The experimental results show that the generated pits and microstructures make the surface uneven, surface roughness increasing about 2 times, also plastic deformation and hardening layer are induced, surface micro- hardness increasing up to about 43% , max compressive residual stress increasing up to - 261 MPa , depth of hardened layer being about 700 mm, and the fatigue life increasing about 6.8 times with the laser energy of 7 J and shock impact times of 4. So laser peening can improve properties of 6082 aluminum alloy significantly.
语种: 中文
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内容类型: 期刊论文
URI标识: http://ir.sia.cn/handle/173321/16827
Appears in Collections:装备制造技术研究室_期刊论文

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