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Evaluation of rolling contact fatigue behaviour of bearing steel subjected to shot peening in a contaminated lubrication
Published 2017-06-01“…Peened specimens were polished to remove the dimples generated by shot peening. The distribution of Vickers hardness and residual stress of the specimens were measured before and after the shot peening. …”
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Two-dimensional imaging of crystal phase and stress component by micro-Raman spectroscope equipped with integral field unit
Published 2018-01-01“…Subsequently, we conduct two-dimensional imaging of the Si phase and residual stress components of the (111)-oriented single-crystal Si wafer induced by Vickers indentation. The Raman spectra are measured under polarization conditions to decompose the triple degeneracy of Si, and the residual stress components around Vickers indentation are calculated from the relations between the Raman shift and applied strain.…”
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Evaluation of rolling contact fatigue behaviour of nitrided SCM435 in a contaminated lubrication
Published 2020-12-01“…Changes of surface topography around Vickers indentation were measured through the RCF test under clean lubrication. …”
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Evaluation of fatigue crack propagation in surface modification layer of duralumin treated by various peening
Published 2017-08-01“…The compressive residual stress σR and Vickers hardness HV are the important factors about fatigue crack propagation, however they do not show a correlation with the number of cycle to failure of the specimen Nf. …”
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Evaluation of fatigue crack propagation in surface modification layer by a load-controlled plate bending fatigue tester
Published 2014-02-01“…In this study, the fatigue crack propagation test was conducted on specimens treated by cavitation peening, which is one of the surface modification techniques, and mechanical properties were also evaluated, including residual stress, yield stress and Vickers hardness, so as to reveal the effect of such mechanical properties varied by the peeing on the fatigue crack propagating behavior. …”
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Cutting and rubbing process for a Ti-6Al-4V alloys, and its effects
Published 2014-10-01“…The fine-grain structure with 500nm grain size was generated at about 20μm below the surface. Vickers hardness values (HV) of the specimen surface after the cutting and friction processing was reached about HV of 500 (40% higher than preprocessing). …”
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Suppression of fatigue crack propagation of duralumin by hybrid peening
Published 2018-07-01“…The new indicator f(σR’, HV’, Rz’, β’) = σR･HV･β/Rz combined with four factors i.e. compressive residual stress σR, Vickers hardness HV, full-width at half maximum β and maximum height roughness Rz showed the effect of suppression of fatigue crack propagation by peening.…”
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Effect of plasma nitriding on the compressive strength of multi-functional fine protrusions formed by sputter-etching of stainless steels
Published 2016-06-01“…Plasma-nitriding was applied to the protrusions by using nitrogen gas of 0.53 Pa mixed with argon gas of 0.67 Pa at a power of 50 W for 1.8 ks. Micro-Vickers hardness tests on cone-shaped protrusions with diameter of about 20 μm formed on the SUS420J2 steel showed that the compressive strength of protrusion tip of the plasma-nitrided specimen is almost four times larger than that of the as-sputter-etched specimen. …”
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Case study on cooling pipe of pre-cooler used for verification test of 70 MPa hydrogen station
Published 2017-04-01“…Chemical composition analysis, microstructure observation and Vickers hardness measurement showed that the main pipe and the mechanical joint pipe were manufactured from SUS316L, and that the filler metal of TIG welding was 316L. …”
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