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Title: Non-Destructive Characterization of Subsurface Residual Stress Fields and Correlation with Microstructural Conditions in a Shot-Peened Inconel Component

Abstract

Shot-peening is an important surface treatment used in a preventative way to guard against fatigue failures. The residual stress state imparted by shot-peening deters the formation and propagation of surface cracks. In this paper, we describe the measurement of residual stresses in an Inconel, IN100, sample using lattice strains measured using High Energy X-ray Diffraction (HEXD) and a Bi-Scale Optimization Method (BSOM). HEXD enabled rapid, non-destructive lattice strain measurements over a large region of the sample. Subsurface strains were obtained using a conical slit setup. The BSOM utilizes a macroscale representation of the sample and a spherical harmonic-based crystal scale representation of crystal orientation space at each experimental point (diffraction volume). A roughly biaxial stress state was predicted with a von Mises equivalent stress between 300 MPa and 400 MPa near the surface. The layer of material with high residual stress induced by shot-peening was found to be approximately 1 mm thick. Diffraction peak width, EBSD, and microhardness measurements were also made on the same sample, which rendered more qualitative measures of the plasticity-related effects of the shot-peening induced residual stress field. All of these measurements show a dimishing shot-peening plasticity with the increasing depth.

Authors:
 [1];  [2];  [3];  [4];  [4]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Ondokuz Mayis Univ., Samsun (Turkey)
  3. Sabanci Univ., Istanbul (Turkey)
  4. Cornell Univ., Ithaca, NY (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Air Force Research Laboratory (AFRL) - Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF); Scientific and Technological Research Council of Turkey (TUBITAK)
OSTI Identifier:
1486881
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Experimental Mechanics
Additional Journal Information:
Journal Volume: 58; Journal Issue: 9; Journal ID: ISSN 0014-4851
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; Finite element method; Nickel superalloy; Residual stress; Shot-peening; X-ray diffraction

Citation Formats

Park, J. -S., Yildizli, K., Demir, E., Dawson, P. R., and Miller, M. P. Non-Destructive Characterization of Subsurface Residual Stress Fields and Correlation with Microstructural Conditions in a Shot-Peened Inconel Component. United States: N. p., 2018. Web. doi:10.1007/s11340-018-0418-z.
Park, J. -S., Yildizli, K., Demir, E., Dawson, P. R., & Miller, M. P. Non-Destructive Characterization of Subsurface Residual Stress Fields and Correlation with Microstructural Conditions in a Shot-Peened Inconel Component. United States. doi:10.1007/s11340-018-0418-z.
Park, J. -S., Yildizli, K., Demir, E., Dawson, P. R., and Miller, M. P. Wed . "Non-Destructive Characterization of Subsurface Residual Stress Fields and Correlation with Microstructural Conditions in a Shot-Peened Inconel Component". United States. doi:10.1007/s11340-018-0418-z. https://www.osti.gov/servlets/purl/1486881.
@article{osti_1486881,
title = {Non-Destructive Characterization of Subsurface Residual Stress Fields and Correlation with Microstructural Conditions in a Shot-Peened Inconel Component},
author = {Park, J. -S. and Yildizli, K. and Demir, E. and Dawson, P. R. and Miller, M. P.},
abstractNote = {Shot-peening is an important surface treatment used in a preventative way to guard against fatigue failures. The residual stress state imparted by shot-peening deters the formation and propagation of surface cracks. In this paper, we describe the measurement of residual stresses in an Inconel, IN100, sample using lattice strains measured using High Energy X-ray Diffraction (HEXD) and a Bi-Scale Optimization Method (BSOM). HEXD enabled rapid, non-destructive lattice strain measurements over a large region of the sample. Subsurface strains were obtained using a conical slit setup. The BSOM utilizes a macroscale representation of the sample and a spherical harmonic-based crystal scale representation of crystal orientation space at each experimental point (diffraction volume). A roughly biaxial stress state was predicted with a von Mises equivalent stress between 300 MPa and 400 MPa near the surface. The layer of material with high residual stress induced by shot-peening was found to be approximately 1 mm thick. Diffraction peak width, EBSD, and microhardness measurements were also made on the same sample, which rendered more qualitative measures of the plasticity-related effects of the shot-peening induced residual stress field. All of these measurements show a dimishing shot-peening plasticity with the increasing depth.},
doi = {10.1007/s11340-018-0418-z},
journal = {Experimental Mechanics},
issn = {0014-4851},
number = 9,
volume = 58,
place = {United States},
year = {2018},
month = {8}
}

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