On the Method of Measurement of Residual Stress in a Hollow Cylinder by X-Ray Method

Yonetani, Shigeru

doi:10.2472/jsms.18.610

Cited by 8 publications

(10 citation statements)

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“…The surface layer of the roller was removed by electrolytic polishing to measure the residual stress below the roller surface. The residual stresses (σx)r and (σy)r in the axial and circumferential directions of the roller, shown in Fig.3, were determined by modifying the measured residual stresses by the elastic calculation (Yonetani, 1969), since the measured stresses were influenced by the removal of the surface layer. The residual stress (σz)r in the radial direction of the roller was determined by the elastic equations (Yonetani, 1969).…”

Section: Test Specimensmentioning

confidence: 99%

Influence of density and nickel content on fatigue strength of powder-forged gears - Comparison with ingot steel and sintered steel -

Seki

Fujii

2017

JAMDSM

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Section: Test Specimensmentioning

confidence: 99%

Influence of density and nickel content on fatigue strength of powder-forged gears - Comparison with ingot steel and sintered steel -

Seki

Fujii

2017

JAMDSM

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“…The surface layer of the roller was removed by electrolytic polishing to measure the residual stress below the roller surface. The residual stresses (σ x ) r and (σ y ) r in the axial and the circumferential directions of the roller, shown in Fig.4, were determined by modifying the measured residual stresses by the elastic calculation (8) , since the measured stresses were influenced by the removal of the surface layer. The residual stress (σ z ) r in the radial direction of the roller was also determined by the elastic equations (8) .…”

Section: Test Specimensmentioning

confidence: 99%

“…The residual stresses (σ x ) r and (σ y ) r in the axial and the circumferential directions of the roller, shown in Fig.4, were determined by modifying the measured residual stresses by the elastic calculation (8) , since the measured stresses were influenced by the removal of the surface layer. The residual stress (σ z ) r in the radial direction of the roller was also determined by the elastic equations (8) . As can be seen in Fig.4, (σ x ) r and (σ y ) r of the peened test rollers were in compressive field in the surface layer.…”

Section: Test Specimensmentioning

confidence: 99%

Rolling Contact Fatigue Life of Steel Rollers Treated by Cavitation Peening and Shot Peening

Seki

Soyama

Kobayashi

et al. 2012

JMMP

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The purpose of this study is to investigate the influence of peening on the rolling contact fatigue (RCF) life of steel rollers. First, steel rollers were treated by three types of peenings to ensure the same surface roughness of peened rollers. One is the cavitation peening (CP) used a cavitating jet in water with an injection pressure of 30 MPa, and the others are the fine particle peening (FPP) with a shot diameter of 0.1 mm and the normal shot peening (NSP) with a shot diameter of 0.3 mm. The surface hardness and the surface compressive residual stress of the steel rollers were increased by all the peenings. In particular, they were most increased by the FPP. On the other hand, the work-hardened depth due to the CP and the NSP was larger than that due to the FPP. As a result of the RCF tests, the RCF lives of the steel rollers were improved by all the peenings, and they were most improved by the NSP. Judging from the p max -N curves and the [A(σ y / 3 HV)] max -N curves, the improvement in RCF lives due to the FPP depended heavily on the increase in surface hardness due to that, and the effects of the CP and the NSP on the RCF were equivalent under the same surface roughness and the same surface hardness. It follows from these that the surface treatment condition should be selected according to the rolling contact conditions and the failure modes of machine elements.

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“…The residual stresses (σ x ) r and (σ y ) r below the circumferential surface of the rollers, shown in Fig. 4, were determined by modifying the measured residual stresses by the elastic calculation (13) , since the measured stresses were influenced by the removal of the surface layer. The residual stress (σ z ) r in the radial direction of the roller was determined by the elastic equations (13) .…”

Section: Test Rollersmentioning

confidence: 99%

Fatigue Strength of Steel Rollers and Gears Treated by Cavitation Peening with Short Processing Time (A Case of Processing Time of 1 min and 5 min)

Seki

Nishie²,

Kozai

et al. 2012

JAMDSM

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In this study, steel rollers and gears were treated by the cavitation peening with processing times of 1 min and 5 min, and they were fatigue-tested using a roller testing machine and a gear testing machine. The surface hardness and the compressive residual stress of the rollers and gears were increased by the cavitation peening, while, the surface roughness of the cavitation-peened rollers and gears was almost the same as that of the non-peened ones. As a result of the fatigue tests, the fatigue strength of the test specimens were improved by the increase in surface hardness due to the cavitation peening, and those without the increase in surface hardness were not increased so much. The fatigue strength of the cavitation-peened test specimens was similar to that of the shot-peened ones obtained by the previous fatigue tests. This study revealed that the cavitation peening is expected to put to practical use in the improvement in fatigue strength of steel gears.

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On the Method of Measurement of Residual Stress in a Hollow Cylinder by X-Ray Method

Cited by 8 publications

References 0 publications

Influence of density and nickel content on fatigue strength of powder-forged gears - Comparison with ingot steel and sintered steel -

Influence of density and nickel content on fatigue strength of powder-forged gears - Comparison with ingot steel and sintered steel -

Rolling Contact Fatigue Life of Steel Rollers Treated by Cavitation Peening and Shot Peening

Fatigue Strength of Steel Rollers and Gears Treated by Cavitation Peening with Short Processing Time (A Case of Processing Time of 1 min and 5 min)

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