Ultra-High-Cycle Fatigue Properties and Evaluation of Crack Growth Life of Dual Phase Stainless Steels

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  • 二相ステンレス鋼の超高サイクル疲労特性とき裂進展寿命評価
  • 2ソウ ステンレス コウ ノ チョウコウサイクル ヒロウ トクセイ ト キレツ シンテン ジュミョウ ヒョウカ

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This report shows results of fatigue properties and fracture mechanism of dual phase stainless steels. The dual phase stainless steels are often used because of advantageous properties of corrosion resistance for seawater, weldability and workability. Recently, a new fatigue problem becomes important, because number of cycles to failure that should be taken into consideration for maintenance increases over 107. For the ultra-high-cycle fatigue, interior inclusions in materials are dominant factor in fatigue life, but the fracture mechanism is not made clear completely. <br> Results of the ultra-high-cycle fatigue properties are shown. The interior fracture takes place at ultra-high-cycle region. The crack growth life is predicted by using fracture mechanics.

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