Cyclic oxidation resistance of In718 superalloy treated by laser peening
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- 作者：Yuchuan Bai ; Yinqun Hua ; Zhen Rong…
- 关键词：cyclic oxidation resistance ; laser peening ; superalloy ; microstructure
- 刊名：Journal of Wuhan University of Technology--Materials Science Edition
- 出版年：2015
- 出版时间：August 2015
- 年：2015
- 卷：30
- 期：4
- 页码：808-812
- 全文大小：1,401 KB
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Yinqun Hua (1)
Zhen Rong (1)
Yunxia Ye (2)
Qing Xue (2)
Haixia Liu (1)
Ruifang Chen (2)
2. School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, China
1. School of Material Science and Engineering, Jiangsu University, Zhenjiang, 212013, China - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Materials Science
Chinese Library of Science - 出版者：Wuhan University, co-published with Springer
- ISSN：1993-0437
文摘
The aim of this study was to improve the cyclic oxidation resistance of In718 superalloy by laser peening(LP). Specimens were treated by LP from one to three times, respectively. The cyclic oxidation tests at 900 ° for periods up to 2 h were conducted. Changes of the top surface morphology and microstructure were analyzed by scanning electron microscope (SEM), energy-dispersive spectra (EDS), transmission electron microscope (TEM) and X-ray diffraction technique (XRD), respectively. The weights were measured between the oxidation cycles to assess the oxidation of the specimens. The top surface microstructure after LP was characterized by highly tangled and dense dislocation arrangements and a high amount of twins. Protective oxidation layer was generated more quickly on the surface treated by LP. The average oxidation rate was about 50 % lower. A tiny homogeneous oxidation layer containing (Fe,Cr)2O3, NiCrO3 and Ni(Al,Cr)2O4 spinel was generated on the surface. The experimental results of cyclic oxidation tests show that specimens treated by LP have a better high temperature oxidation resistance, and the antistrip performance of the oxidation layer improves. Moreover, the effects of LP are strengthened with the increase of laser peening.