| Experimental investigation of laser peening on TiAl alloy microstructure and properties | |
| Alternative Title | Experimental investigation of laser peening on TiAl alloy microstructure and properties |
| Qiao Hongchao1; Zhao Jibin1; Gao Yu2 | |
| 2015 | |
| Source Publication | Chinese Journal of Aeronautics
 |
| ISSN | 1000-9361 |
| Volume | 28Issue:2Pages:609-616 |
| Abstract | 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. |
| Other Abstract | 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. |
| Keyword | High temperature stability Laser peening Microstructure Residual stress TiAl alloy Motor vehicles. Aeronautics. Astronautics TL1-4050 |
| Indexed By | CSCD |
| Language | 英语 |
| Funding Project | [National High Technology Research and Development Program of China (863 Program)] |
| CSCD ID | CSCD:5399001 |
| Citation statistics |
Cited Times:16[CSCD]
[CSCD Record]
|
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/156123 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.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. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment