Experimental investigation of laser peening on TiAl alloy microstructure and properties

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	Experimental investigation of laser peening on TiAl alloy microstructure and properties
其他题名	Experimental investigation of laser peening on TiAl alloy microstructure and properties
	Qiao Hongchao 1; Zhao Jibin 1; Gao Yu 2
	2015
发表期刊	Chinese Journal of Aeronautics
ISSN	1000-9361
卷号	28 期号:2 页码:609-616
摘要	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 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.
其他摘要	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 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.
关键词	High temperature stability Laser peening Microstructure Residual stress TiAl alloy Motor vehicles. Aeronautics. Astronautics TL1-4050
收录类别	CSCD
语种	英语
资助项目	[National High Technology Research and Development Program of China (863 Program)]
CSCD记录号	CSCD:5399001
引用统计	被引频次：16[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/156123
专题	中国科学院金属研究所
作者单位	1.中国科学院 2.中国科学院金属研究所
推荐引用方式 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.