Evaluation of the Compressive Residual Stress Relaxation Behavior by &lt;i&gt;in situ&lt;/i&gt; X-ray Stress Measurement

Hayama, Motoaki; Kikuchi, Shinichi; Komotori, Jun

doi:10.2355/isijinternational.isijint-2021-566

Cited by 13 publications

(4 citation statements)

References 20 publications

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“…Therefore, although the fatigue properties improved with the increase in peening temperature, the resistance to fatigue crack propagation decreased with the increase in temperature. Compressive residual stresses were released by compressive loading during fatigue tests 28,29 . However, in the present study, the fatigue tests were performed at a stress ratio of 0.1, which means that compressive stresses were not induced on the treated surfaces of the specimens during the fatigue tests.…”

Section: Resultsmentioning

confidence: 77%

“…Compressive residual stresses were released by compressive loading during fatigue tests. 28,29 However, in the present study, the fatigue tests were performed at a stress ratio of 0.1, which means that compressive stresses were not induced on the treated surfaces of the specimens during the fatigue tests. Therefore, the compressive residual stresses introduced by AIH-FPP were not released and contributed to the improvement of the fatigue properties.…”

Section: Effect Of Peening Temperature On the Fatigue Properties Of A...mentioning

confidence: 88%

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Effect of atmospheric‐controlled induction‐heating fine particle peening on microstructure and fatigue properties of low‐alloy steel

Takesue

Hayama

Komotori

2022

Fatigue Fract Eng Mat Struct

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Atmospheric‐controlled induction‐heating fine particle peening (AIH‐FPP) was performed for low‐alloy steel, and the effects of the peening temperature, the microstructure of steel, and thermal history during AIH‐FPP on the resultant microstructure of treated steel were investigated. Regardless of the prior microstructure and thermal history, the grains near the surfaces were refined by AIH‐FPP at peening temperatures from 923 K to 1023 K owing to dynamic recrystallization. To examine the effect of AIH‐FPP on the fatigue properties of steel, plane‐bending fatigue tests were performed. Compared with the steel mirror‐polished, treated with FPP at RT, or only induction‐heated, the fatigue properties of steel treated with AIH‐FPP were improved. This is because of the formation of a thick and uniform grain‐refined layer, the generation of compressive residual stress, and hardening of the surface by AIH‐FPP. Moreover, owing to the grain refinement progress, the fatigue properties of steel improved with increasing peening temperature.

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Section: Resultsmentioning

confidence: 77%

Section: Effect Of Peening Temperature On the Fatigue Properties Of A...mentioning

confidence: 88%

Effect of atmospheric‐controlled induction‐heating fine particle peening on microstructure and fatigue properties of low‐alloy steel

Takesue

Hayama

Komotori

2022

Fatigue Fract Eng Mat Struct

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“…The aforementioned portable XRD equipment with a Cr tube was utilized to measure the retained austenite during the fatigue process. The authors [22] developed a method for the in situ measurement of the residual stress in specimens under stress-loading conditions and the change of the residual stress during fatigue using the XRD equipment. Because this method does not require the removal of the specimen from a fatigue test machine, the transformation behavior of the retained austenite can be measured during the fatigue process by applying the in situ measurement method.…”

Section: Measurement Of Retained Austenite During Fatiguementioning

confidence: 99%

“…In Section 3.3, we described the increase in the compressive residual stress owing to the transformation of the retained austenite during fatigue. To comprehensively investigate the increase in the compressive residual stress, we measured the change behavior of the compressive residual stress under the tensile loading process using a in situ X-ray stress measurements, which we previously proposed [22]. Fig.…”

Section: Change In Retained Austenite and Residual Stress During Firs...mentioning

confidence: 99%

Change Behavior of Retained Austenite and Residual Stress on Carburized SCM420H Steel during Fatigue Process

Hayama,

Maki,

Kikuchi

et al. 2024

ISIJ Int.

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The transformation behavior of retained austenite in carburized SCM420H steel and its effect on the change in residual stress on a surface are investigated. The retained austenite on the carburized steel is transformed significantly in the first cycle of fatigue loading with a stress ratio of − 1, and the transformation is less significant thereafter. Tensile loading significantly affects the transformation of retained austenite as compared with compressive loading. This is because the mechanical driving force that contributes to the martensitic transformation of retained austenite differs under tensile and compressive stresses. To investigate the transformation behavior of retained austenite and residual stress more comprehensively, an in situ X-ray measurement of retained austenite and residual stress is conducted. In the measurement, retained austenite or residual stress on a specimen surface is measured under loading conditions. Results show that the transformation of retained austenite under tensile loading involves a threshold stress value at which the transformation begins. The transformation of retained austenite proceeds when the applied stress exceeds the threshold value; however, no transformation occurs regardless of the number of loading cycles when the applied stress does not exceed the threshold. The compressive residual stress on the specimen surface increases as retained austenite transforms to martensite due to stress loading.

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Effect of surface characteristics on the axial fatigue properties and wear resistance of Ti-6Al-4V alloy nitrided by gas blow induction-heating

Takesue,

Suyama,

Hayama

et al. 2024

Engineering Failure Analysis

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Evaluation of the Compressive Residual Stress Relaxation Behavior by <i>in situ</i> X-ray Stress Measurement

Cited by 13 publications

References 20 publications

Effect of atmospheric‐controlled induction‐heating fine particle peening on microstructure and fatigue properties of low‐alloy steel

Effect of atmospheric‐controlled induction‐heating fine particle peening on microstructure and fatigue properties of low‐alloy steel

Change Behavior of Retained Austenite and Residual Stress on Carburized SCM420H Steel during Fatigue Process

Effect of surface characteristics on the axial fatigue properties and wear resistance of Ti-6Al-4V alloy nitrided by gas blow induction-heating

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