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Title: Non-Destructive Measurement of Residual Strain in Connecting Rods Using Neutrons

Abstract

Increasing the strength of materials is effective in reducing weight and boosting structural part performance, but there are cases in where the residual strain generated during the process of manufacturing of high-strength materials results in a decline of durability. It is therefore important to understand how the residual strain in a manufactured component changes due to processing conditions. In the case of a connecting rod, because the strain load on the connecting rod rib sections is high, it is necessary to clearly understand the distribution of strain in the ribs. However, because residual strain is generally measured by using X-ray diffractometers or strain gauges, measurements are limited to the surface layer of the parts. Neutron beams, however, have a higher penetration depth than X-rays, allowing for strain measurement in the bulk material. The research discussed within this paper consists of non-destructive residual strain measurements in the interior of connecting rods using the 2nd Generation Neutron Residual Stress Mapping Facility (NRSF2) at Oak Ridge National Laboratory, measuring the Fe (211) diffraction peak position of the ferrite phase. The interior strain distribution of connecting rod, which prepared under different manufacturing processes, was revealed. By the visualization of interior strains, clear understandings ofmore » differences in various processing conditions were obtained. In addition, it is known that the peak width, which is also obtained during measurement, is suggestive of the size of crystallites in the structure; however the peak width can additionally be caused by microstresses and material dislocations.« less

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2];  [1];  [1];  [1];  [1]
  1. Honda R&D
  2. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1436944
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Journal Volume: 1; Conference: WCX™18: SAE World Congress Experience - Detroit, Michigan, United States of America - 4/10/2018 8:00:00 AM-4/12/2018 8:00:00 AM
Country of Publication:
United States
Language:
English

Citation Formats

Ikeda, Tomohiro, Bunn, Jeffrey R., Fancher, Christopher M., Seid, Alan, Motani, Ryuta, Matsuda, Hideki, and Okayama, Tatsuya. Non-Destructive Measurement of Residual Strain in Connecting Rods Using Neutrons. United States: N. p., 2018. Web. doi:10.4271/2018-01-1063.
Ikeda, Tomohiro, Bunn, Jeffrey R., Fancher, Christopher M., Seid, Alan, Motani, Ryuta, Matsuda, Hideki, & Okayama, Tatsuya. Non-Destructive Measurement of Residual Strain in Connecting Rods Using Neutrons. United States. doi:10.4271/2018-01-1063.
Ikeda, Tomohiro, Bunn, Jeffrey R., Fancher, Christopher M., Seid, Alan, Motani, Ryuta, Matsuda, Hideki, and Okayama, Tatsuya. Sun . "Non-Destructive Measurement of Residual Strain in Connecting Rods Using Neutrons". United States. doi:10.4271/2018-01-1063. https://www.osti.gov/servlets/purl/1436944.
@article{osti_1436944,
title = {Non-Destructive Measurement of Residual Strain in Connecting Rods Using Neutrons},
author = {Ikeda, Tomohiro and Bunn, Jeffrey R. and Fancher, Christopher M. and Seid, Alan and Motani, Ryuta and Matsuda, Hideki and Okayama, Tatsuya},
abstractNote = {Increasing the strength of materials is effective in reducing weight and boosting structural part performance, but there are cases in where the residual strain generated during the process of manufacturing of high-strength materials results in a decline of durability. It is therefore important to understand how the residual strain in a manufactured component changes due to processing conditions. In the case of a connecting rod, because the strain load on the connecting rod rib sections is high, it is necessary to clearly understand the distribution of strain in the ribs. However, because residual strain is generally measured by using X-ray diffractometers or strain gauges, measurements are limited to the surface layer of the parts. Neutron beams, however, have a higher penetration depth than X-rays, allowing for strain measurement in the bulk material. The research discussed within this paper consists of non-destructive residual strain measurements in the interior of connecting rods using the 2nd Generation Neutron Residual Stress Mapping Facility (NRSF2) at Oak Ridge National Laboratory, measuring the Fe (211) diffraction peak position of the ferrite phase. The interior strain distribution of connecting rod, which prepared under different manufacturing processes, was revealed. By the visualization of interior strains, clear understandings of differences in various processing conditions were obtained. In addition, it is known that the peak width, which is also obtained during measurement, is suggestive of the size of crystallites in the structure; however the peak width can additionally be caused by microstresses and material dislocations.},
doi = {10.4271/2018-01-1063},
journal = {},
issn = {0148--7191},
number = ,
volume = 1,
place = {United States},
year = {2018},
month = {4}
}

Conference:
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