孙博宇,乔红超,陆莹,赵吉宾,吴嘉俊,胡太友,杨灏.线偏振激光斜冲击实验与理论研究[J].表面技术,2019,48(1):126-132.
SUN Bo-yu,QIAO Hong-chao,LU Ying,ZHAO Ji-bin,WU Jia-jun,HU Tai-you,YANG Hao.Experiment and Theoretic Analysis of Linear Polarized Laser Oblique Shock[J].Surface Technology,2019,48(1):126-132 |
| 线偏振激光斜冲击实验与理论研究 |
| Experiment and Theoretic Analysis of Linear Polarized Laser Oblique Shock |
| 投稿时间：2018-07-16 修订日期：2019-01-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.01.016 |
| 中文关键词: 激光技术 激光冲击强化 冲击角度 偏振方向 钛合金 |
| 英文关键词:laser technique laser shock peening shock angle polarization direction titanium alloy |
| 基金项目:国家重点研发计划（2016YFB1102704）；国家基金委-辽宁省联合基金（U1608259）；国家自然科学基金（51501219） |
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| Author | Institution |
| SUN Bo-yu | 1.Equipment Manufacturing Technology Laboratory, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China; 2.Institute for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China |
| QIAO Hong-chao | 1.Equipment Manufacturing Technology Laboratory, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China; 2.Institute for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China |
| LU Ying | 1.Equipment Manufacturing Technology Laboratory, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China; 2.Institute for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China |
| ZHAO Ji-bin | 1.Equipment Manufacturing Technology Laboratory, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China; 2.Institute for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China |
| WU Jia-jun | 1.Equipment Manufacturing Technology Laboratory, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China; 2.Institute for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China; 3.School of Computer and Control Engineering, University of Chinese Academy of Sciences, Beijing 100049, China |
| HU Tai-you | 1.Equipment Manufacturing Technology Laboratory, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China; 2.Institute for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China; 3.School of Computer and Control Engineering, University of Chinese Academy of Sciences, Beijing 100049, China |
| YANG Hao | 4.Dept. of Mechanical Engineering, University of Alabama, Tuscaloosa AL35487, USA |
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| 中文摘要: |
| 目的 研究激光冲击强化中冲击角度对强化效果的影响。方法 采用波长为1064 nm、脉冲能量为7 J、脉冲宽度为12 ns的YAG激光器对TC4钛合金表面进行冲击强化处理，得到经不同偏振方向、冲击角度冲击后的材料的表面形貌、硬度和残余应力。通过菲涅耳定律分析了不同偏振光斜冲击加工效果的差异。结果 随着冲击角度的增大，冲击后形成的微坑深度逐渐减少，且正交偏振光减少的程度大于平行偏振光减少的程度，在超过30°的时候尤为明显。随着冲击角度的增大，试样表面显微硬度逐渐下降，当用平行偏振光斜冲击时，硬度下降较慢；而用正交偏振光斜冲击且冲击角度超过15°时，硬度下降较快。随着冲击角度增加，由于“残余应力洞”的影响，中心残余压应力值先增大后减少。结论 在一定情形下，选用一定角度的斜冲击可以有效避免残余应力洞的产生。该研究得到的结论可以为复杂结构件激光冲击强化冲击轨迹规划提供一定的参考。 |
| 英文摘要: |
| The work aims to study the influence of shock angles on the strengthening effect for laser shock peening. TC4 ti-tanium alloy samples were treated by YAG laser system with wavelength of 1064 nm, pulse-energy of 7 J and pulse-width of 12 ns. The surface topography, residual stress and microhardness of the samples shocked in different polarization directions by differ-ent shock angles were obtained. The difference of impact processing effect for different polarized oblique laser was analyzed by the Fresnel's law. With the increase of the shock angle, the pit depth of the samples caused by the shock gradually reduced. The depth decrease by the orthogonal polarization laser was more obvious compared with that by the parallel polarization laser, particularly when the angle exceeded 30?. As the shock angle increased, the microhardness of samples gradually decreased. The microhardness decreased slowly for parallel polarized laser. However, the microhardness decreased rapidly for orthogonal polarized laser when the shock angle exceeded 15?. When the shock angle increased, the centeral residual stress increased first and then decreased. The residual stress hole can be solved effectively by choosing the appropriate shock angle in some cases. The conclusions can provide guidance for the laser shock peening trajectory planning of complex structures workpieces. |
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