Trend and Future for Fatigue Characteristics of Sintered Ferrous Products.

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  • Honda Tadatoshi
    Dept. Mechanical Engineering and Materials Science, Kumamoto University

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  • 自動車焼結部品の高付価値化　鉄系焼結部品の疲労強度特性の現状と課題
  • テツケイ ショウケツ ブヒン ノ ヒロウ キョウド トクセイ ノ ゲンジョウ

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Abstract

The use of sintered ferrous components in automotive applications has been increasing. At the same time, fatigue properties are becoming more and more important in the application for PM structural parts. Therefore, it is important in the future to add fatigue data to conventional materials data for sintered materials used in dynamically stressed components. This paper reviews the following factors influencing fatigue properties of sintered ferrous materials.<BR>(1) Relation between matrix and pore structures<BR>(2) Post-sintering treatment (heat-treatment, surface working, etc)<BR>(3) Crack propagation rate and stress intensity factor<BR>(4) Statistical analysis of fatigue strength and fatigue life

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