This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Non-Destructive Measurement of Residual Strain in Connecting Rods Using Neutrons
Technical Paper
2018-01-1063
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
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 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.
Recommended Content
Technical Paper | Measuring Engine Wear by Surface Layer Activation Extension to Nanometer Increments |
Technical Paper | Diffusive Sampling of US Navy Submarine Atmospheres |
Technical Paper | APPLYING HARD THIN COATINGS TO TAPPETS TO REDUCE FRICTION |
Authors
Citation
Ikeda, T., Bunn, J., Fancher, C., Seid, A. et al., "Non-Destructive Measurement of Residual Strain in Connecting Rods Using Neutrons," SAE Technical Paper 2018-01-1063, 2018, https://doi.org/10.4271/2018-01-1063.Also In
References
- Ilia , E. , O’Neil , M. , Tutton , K. , Lanni , G. et al. Benchmarking the Industry: Powder Forging Makes a Beter Connecting Rod SAE Technical Paper 2005-01-0713 2005 10.4271/2005-01-0713
- Takada , K. , Kogure , R. , and Kobayashi , T. Research of High Fatigue Strength for Powder-forged Connecting Rods Honda R & D Technical Review 19 2 2007
- Iida , Z. , Takada , K. , Suzuki , S. , and Sato , C. Development of Light Weight Connecting Rod Honda R & D Technical Review 17 2 2005
- Stephen Spooner , E. Payzant , A. , Hubbard , C.R. , Donlon , W.T. et al. Neutron scattering Residual Stress Measurements on Gray Cast Iron Brake Disc 2nd International Conference on Quenching & Control of Distortion Cleveland 1996
- Hemple , N. , Bunn , J.R. , Thomas , N.-P. , Andrew Payzant , E. et al. Study on the Residual Stress Relaxation in Girth-Welded Steel Pipes under Bending Load Using Diffraction Methods Materials Science & Engineering A 688 289 300 2017
- Ikeda , T. , Furukawa , A. , Okayama , T. , and Yoshida , H. Detailed Structural Analysis of Pd Particles through Use of XAFS and STEM-EELS in Tandem Honda R & D Technical Review 29 1 2017
- Neutron Residual Stress Mapping Facility, Oak Ridge National Laboratory https://neutrons.ornl.gov/nrsf2
- Scherrer , P. 1918