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激光冲击强化对6082铝合金机械性能的影响
Alternative TitleEffect of Laser Peening on Mechanical Properties of 6082 Aluminum Alloy
乔红超
Department装备制造技术研究室
Source Publication激光与光电子学进展
ISSN1006-4125
2015
Volume52Issue:6Pages:166-172
Indexed ByCSCD
CSCD IDCSCD:5458439
Contribution Rank1
Funding Organization国家863计划(2012AA041310)
Keyword激光器 激光冲击强化 铝合金 显微硬度 微结构 残余应力
Abstract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...
Other AbstractIn 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.
Language中文
Citation statistics
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.sia.cn/handle/173321/16827
Collection智能产线与系统研究室
Affiliation中国科学院沈阳自动化研究所
Recommended Citation
GB/T 7714
乔红超. 激光冲击强化对6082铝合金机械性能的影响[J]. 激光与光电子学进展,2015,52(6):166-172.
APA 乔红超.(2015).激光冲击强化对6082铝合金机械性能的影响.激光与光电子学进展,52(6),166-172.
MLA 乔红超."激光冲击强化对6082铝合金机械性能的影响".激光与光电子学进展 52.6(2015):166-172.
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