光学学报, 2017, 37 (6): 0614005, 网络出版: 2017-06-08
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
激光技术 激光喷丸 Inconel X-750镍基合金 热腐蚀 残余应力 laser technique laser peening Inconel X-750 nickel-based alloy hot-corrosion residual stress
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60 h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60 h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。
Abstract
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.
杨颖秋, 周建忠, 盛杰, 陈松玲, 黄舒, 孟宪凯, 杨祥伟. Inconel X-750镍基合金激光喷丸抗热腐蚀性能及机理[J]. 光学学报, 2017, 37(6): 0614005. Yang Yingqiu, Zhou Jianzhong, Sheng Jie, Chen Songling, Huang Shu, Meng Xiankai, Yang Xiangwei. Hot-Corrosion-Resistance Property and Mechanism of Inconel X-750 Nickel-Based Alloy Processed by Laser Peening[J]. Acta Optica Sinica, 2017, 37(6): 0614005.