Inconel X-750镍基合金激光喷丸抗热腐蚀性能及机理  

Hot-Corrosion-Resistance Property and Mechanism of Inconel X-750 Nickel-Based Alloy Processed by Laser Peening

作　　者：杨颖秋[1] 周建忠[1] 盛杰[1] 陈松玲[1] 黄舒[1] 孟宪凯[1] 杨祥伟[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《光学学报》2017年第6期152-158,共7页Acta Optica Sinica

基　　金：国家自然科学基金(51405204;51575242);中国博士后科学基金资助项目(2013 M540417;2014T70477);江苏省博士后科研资助计划(1401065B);江苏省大型工程装备检测与控制重点建设实验室开放课题(JSKLEDC201501;JSKLEDC201503);江苏大学大学生科研立项资助项目(14A126);常州市高技术研究重点实验室资助项目(CM20153001)

摘　　要：采用不同脉冲能量激光对Inconel X-750镍基合金试样进行激光喷丸(LP)强化处理,研究了不同条件下试样的热腐蚀行为,阐述了激光喷丸改善抗热腐蚀性能的机理。结果表明,LP试样的腐蚀速度明显低于未处理试样的,且激光脉冲能量越高,LP试样的腐蚀速度越低。未处理试样在热腐蚀60h后出现了两层腐蚀层,外部腐蚀层严重腐蚀并出现断裂和剥落现象。LP试样在腐蚀60h后只出现了内部氧化层,激光喷丸诱导的残余应力层有效避免了氧化膜破裂。The strengthen treatment of Inconel X-50 nickel-based alloys are performed by laser peening（LP）with different pulse energies.The hot-corrosion behavior of specimens under different conditions is studied,and the mechanism of enhancement of hot-corrosion-resistance property by LP is discussed.The results show that the corrosion rate of specimens after LP processing is obviously lower than that of the untreated specimens,and the higher the pulse energy is,the lower the corrosion rate of specimens after LP processing is.The untreated specimens exhibit two corrosion layers after hot-corrosion for 60 h where the outer corrosion layer is seriously corroded and thus the phenomenon of breaking and stripping off arises.The specimens after LP processing only appear an internal oxide layer after hot-corrosion for 60 h.The LP-induced residual stress layer effectively avoids the rupture of oxide films.

关 键 词：激光技术 激光喷丸 INCONEL X-750镍基合金 热腐蚀 残余应力 

分 类 号：TN249[电子电信—物理电子学]