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Title: The in-depth residual strain heterogeneities due to an indentation and a laser shock peening for Ti-6Al-4V titanium alloy

In this paper, heterogeneity of the through-thickness residual strain due to the laser shock peening (LSP) in comparison with that due to the indentation was studied in Ti-6Al-4V alloy samples. The latter is almost a quasi-static process while the former features extremely high strain-rate deformation. The synchrotron based high-energy X-ray diffraction was employed to investigate the through-thickness residual strain distribution. The studied two samples after the two processing procedures share the following features: (i) the pressure affected depths are both ~2 mm and (ii) the largest magnitudes of the compressive residual strains parallel to the surface are ~4,000 με. However, the pit depth for the indentation sample is ~9 times larger than that for the LSP. The position featuring the largest magnitude of the compressive residual strain is in the sub-surface for the indentation while it is in the surface for the LSP. Results of the elastic-visco-plastic finite element simulation for the indentation indicate that the position featuring the maximum accumulative plastic shear as defined in this paper corresponds to the location with the largest magnitude of compressive residual strain. To validate this finding, full width at half maximum (FWHM) of the X-ray diffraction profile, which is proportional to themore » level of the plastic deformation, is also studied. Finally, it is found that positions with the largest FWHM indeed correspond to the largest magnitude of compressive residual strain for both tests.« less
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [5] ;  [6]
  1. Univ. of Science and Technology Beijing (USTB) (China). State Key Lab. for Advanced Metals and Materials (SKLAMM)
  2. Beijing Inst. of Technology (China). School of Materials Science and Engineering
  3. RWTH Aachen Univ. (Germany). Steel Inst.
  4. Argonne National Lab. (ANL), Argonne, IL (United States). X-Ray Science Division
  5. Air Force Engineering Univ., Xi'an (China). Science and Technology on Plasma Dynamics Lab.
  6. Beijing Inst. of Aeronautical Materials (China)
Publication Date:
Grant/Contract Number:
AC02-06CH11357; 51471032; 51231002; 51571025; 06111020; FRF-TP-14-047A1; FRF-TP-15-057A2; 2014Z-01; 2014M560884
Type:
Accepted Manuscript
Journal Name:
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
Additional Journal Information:
Journal Volume: 714; Journal ID: ISSN 0921-5093
Publisher:
Elsevier
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Science and Technology Beijing (USTB) (China)
Sponsoring Org:
USDOE; National Natural Science Foundation of China (NNSFC); Fundamental Research Funds for the Central Universities (China); State Key Lab. for Advanced Metals and Materials (China); China Postdoctoral Science Foundation
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; laser shock peening; indentation; Ti-6Al-4V; residual strains; elastic-visco-plastic finite element model
OSTI Identifier:
1461316

Xie, Q., Li, R., Wang, Y. D., Su, R., Lian, J., Ren, Y., Zheng, W., Zhou, X., and Wang, Y.. The in-depth residual strain heterogeneities due to an indentation and a laser shock peening for Ti-6Al-4V titanium alloy. United States: N. p., Web. doi:10.1016/j.msea.2017.12.073.
Xie, Q., Li, R., Wang, Y. D., Su, R., Lian, J., Ren, Y., Zheng, W., Zhou, X., & Wang, Y.. The in-depth residual strain heterogeneities due to an indentation and a laser shock peening for Ti-6Al-4V titanium alloy. United States. doi:10.1016/j.msea.2017.12.073.
Xie, Q., Li, R., Wang, Y. D., Su, R., Lian, J., Ren, Y., Zheng, W., Zhou, X., and Wang, Y.. 2017. "The in-depth residual strain heterogeneities due to an indentation and a laser shock peening for Ti-6Al-4V titanium alloy". United States. doi:10.1016/j.msea.2017.12.073. https://www.osti.gov/servlets/purl/1461316.
@article{osti_1461316,
title = {The in-depth residual strain heterogeneities due to an indentation and a laser shock peening for Ti-6Al-4V titanium alloy},
author = {Xie, Q. and Li, R. and Wang, Y. D. and Su, R. and Lian, J. and Ren, Y. and Zheng, W. and Zhou, X. and Wang, Y.},
abstractNote = {In this paper, heterogeneity of the through-thickness residual strain due to the laser shock peening (LSP) in comparison with that due to the indentation was studied in Ti-6Al-4V alloy samples. The latter is almost a quasi-static process while the former features extremely high strain-rate deformation. The synchrotron based high-energy X-ray diffraction was employed to investigate the through-thickness residual strain distribution. The studied two samples after the two processing procedures share the following features: (i) the pressure affected depths are both ~2 mm and (ii) the largest magnitudes of the compressive residual strains parallel to the surface are ~4,000 με. However, the pit depth for the indentation sample is ~9 times larger than that for the LSP. The position featuring the largest magnitude of the compressive residual strain is in the sub-surface for the indentation while it is in the surface for the LSP. Results of the elastic-visco-plastic finite element simulation for the indentation indicate that the position featuring the maximum accumulative plastic shear as defined in this paper corresponds to the location with the largest magnitude of compressive residual strain. To validate this finding, full width at half maximum (FWHM) of the X-ray diffraction profile, which is proportional to the level of the plastic deformation, is also studied. Finally, it is found that positions with the largest FWHM indeed correspond to the largest magnitude of compressive residual strain for both tests.},
doi = {10.1016/j.msea.2017.12.073},
journal = {Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing},
number = ,
volume = 714,
place = {United States},
year = {2017},
month = {12}
}