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Title: Intergranular stress study of TC11 titanium alloy after laser shock peening by synchrotron-based high-energy X-ray diffraction

The distribution of residual lattice strain as a function of depth were carefully investigated by synchrotron-based high energy X-ray diffraction (HEXRD) in TC11 titanium alloy after laser shock peening (LSP). The results presented big compressive residual lattice strains at surface and subsurface, then tensile residual lattice strains in deeper region, and finally close to zero lattice strains in further deep interior with no plastic deformation thereafter. These evolutions in residual lattice strains were attributed to the balance of direct load effect from laser shock wave and the derivative restriction force effect from surrounding material. Significant intergranular stress was evidenced in the processed sample. The intergranular stress exhibited the largest value at surface, and rapidly decreased with depth increase. The magnitude of intergranular stress was proportional to the severity of the plastic deformation caused by LSP. Two shocks generated larger intergranular stress than one shock.
Authors:
 [1] ; ORCiD logo [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [1]
  1. Hebei Univ. of Science and Technology, Shijiazhuang, Hebei (China). School of Materials Science and Engineering
  2. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Applied Physics, Shanghai Synchrotron Radiation Facility
  3. Univ. of Science and Technology, Beijing (China). State Key Lab. for Advanced Metals and Materials
  4. Beijing Inst. of Technology, Beijing (China). School of Materials Science and Engineering
  5. Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division
  6. Air Force Engineering Univ., Xi’an (China). Science and Technology on Plasma Dynamics Lab.
Publication Date:
Grant/Contract Number:
AC02-06CH11357; AC02-06-CH11357
Type:
Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 8; Journal Issue: 5; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
National Key Research and Development Program of China; National Natural Science Foundation of China (NNSFC); Fundamental Research Funds for the Central Universities; Chinese Academy of Sciences (CAS). State Key Laboratory for Advanced Metals and Materials; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; intergranular stress (grainorientation-dependent residual stress); laser shock peening (LSP); synchrotron high energy X-ray diffraction (HEXRD); titanium alloy
OSTI Identifier:
1466298
Alternate Identifier(s):
OSTI ID: 1438961