Fatigue Strength of Specimens Ground by a CBN Wheel. In Cases of Carbon Steels and a Nickel-Base Super Alloy.

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  • ＣＢＮ研削加工材の疲労強度　　炭素鋼およびＮｉ基合金の場合
  • CBN ケンサク カコウザイ ノ ヒロウ キョウド タンソ コウ オヨビ Ni

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Abstract

Rotating bending fatigue tests were carried out on carbon steels and a nickel-based super alloy, Inconel 718, for investigation of the effect of CBN wheel grinding on the fatigue strength at room temperature and 500°C. The results are discussed from several view points, including surface roughness, residual stress and work hardening or softening due to grinding. The fatigue strength increased upon CBN wheel grinding at room temperature, primarily because of generation of compressive residual stress due to the CBN wheel grinding. However, this marked increase in the fatigue strength due to CBN wheel grinding tended to disappear at elevated temperature.

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