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Experimental investigation of laser peening on TiAl alloy microstructure and properties
Alternative TitleExperimental investigation of laser peening on TiAl alloy microstructure and properties
Qiao Hongchao1; Zhao Jibin1; Gao Yu2
2015
Source PublicationChinese Journal of Aeronautics
ISSN1000-9361
Volume28Issue:2Pages:609-616
AbstractIn 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 1064nm, pulse-width of 18ns, and pulse-energy of 0–10J. 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 0.37μm, compressive residual stress increases to 337MPa, 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 337MPa to 260MPa, hardness value drops from 377HV0.2 to 343HV0.2, and the (002) poles shift back to the center slightly. Laser peening improves microstructure and properties of TiAl alloy significantly.
Other AbstractIn 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 1064nm, pulse-width of 18ns, and pulse-energy of 0-10J. 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 0.37μm, compressive residual stress increases to 337MPa, 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 337MPa to 260MPa, hardness value drops from 377HV0.2 to 343HV0.2, and the (002) poles shift back to the center slightly. Laser peening improves microstructure and properties of TiAl alloy significantly.
KeywordHigh temperature stability Laser peening Microstructure Residual stress TiAl alloy Motor vehicles. Aeronautics. Astronautics TL1-4050
Indexed ByCSCD
Language英语
Funding Project[National High Technology Research and Development Program of China (863 Program)]
CSCD IDCSCD:5399001
Citation statistics
Cited Times:3[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/156123
Collection中国科学院金属研究所
Affiliation1.中国科学院
2.中国科学院金属研究所
Recommended Citation
GB/T 7714
Qiao Hongchao,Zhao Jibin,Gao Yu. Experimental investigation of laser peening on TiAl alloy microstructure and properties[J]. Chinese Journal of Aeronautics,2015,28(2):609-616.
APA Qiao Hongchao,Zhao Jibin,&Gao Yu.(2015).Experimental investigation of laser peening on TiAl alloy microstructure and properties.Chinese Journal of Aeronautics,28(2),609-616.
MLA Qiao Hongchao,et al."Experimental investigation of laser peening on TiAl alloy microstructure and properties".Chinese Journal of Aeronautics 28.2(2015):609-616.
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