Experimental investigation of laser peening on TiAl alloy microstructure and properties
查看参考文献25篇
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文摘
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In order to study the effect of laser peening on microstructures and properties of TiAl alloy, TiAl alloy samples were treated by Nd:YAG laser system with the wavelength of 1064 nm, pulse-width of 18 ns, and pulse-energy of 0–10 J. Surface micro-hardness, roughness, and microstructural characteristics were tested with micro-hardness tester, roughness tester and scanning electron microscope. Residual stress and pole figures were tested with X-ray diffraction and its high-temperature stability was analyzed. The experimental results show that surface micro-hardness increases by up to 30%, roughness increases to 0.37 lm, compressive residual stress increases to 337 MPa, and local texture and typical lamellar microstructure are generated. Residual stress, micro-hardness, and (002) pole figures tests are conducted, compressive residual stress value drops from 337 MPa to 260 MPa, hardness value drops from 377 HV_(0.2) to 343 HV_(0.2), and the (002) poles shift back to the center slightly. Laser peening improves microstructure and properties of TiAl alloy significantly. |
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来源
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Chinese Journal of Aeronautics
,2015,28(2):609-616 【核心库】
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DOI
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10.1016/j.cja.2015.01.006
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关键词
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High temperature stability
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Laser peening
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Microstructure
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Residual stress
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TiAl alloy
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地址
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1.
Shenyang Institute of Automation Chinese Academy of Science, Shenyang, 110016
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AVIC Shenyang Liming Aero-engine (Group) Corporation Ltd., Shenyang, 110016
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1000-9361 |
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学科
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自动化技术、计算机技术 |
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基金
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supported by the National High Technology Research and Development Program of China (863 Program)
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文献收藏号
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CSCD:5399001
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