高温環境下における工業用純チタンの疲労き裂発生挙動

DOI 機関リポジトリ Web Site Web Site 参考文献10件

書誌事項

タイトル別名
  • Fatigue Crack Initiation Behavior of Commercially Pure Titanium at Elevated Temperature.
  • コウオン カンキョウ カ ニ オケル コウギョウヨウ ジュンチタン ノ ヒロウ

この論文をさがす

抄録

Push-pull fatigue tests were carried out on commercially pure titanium sheet at 393 K and 573 K in order to investigate the effect of elevated temperature on fatigue crack initiation behavior. The static and fatigue strengths decrease with the increase of temperature. At elevated temperatures, the sharp knee in S-N curve observed at room temperature disappears. Successive observations on specimen surface and measurements of strain hardening exponent have shown that the mechanism of crack initiation differs profoundly due to the increase in temperature. At a room temperature, fatigue microcracks initiate at a few tenth percent of fatigue life, along slip bands within not a single but multiple neighboring grains. At elevated temperatures, however, they initiate at less than 10% of their lives, along grain boundary where crowd slip bands impinge. This is ascribed to the activation of slip deformation and enhancement of strain hardening at elevated temperatures.

収録刊行物

参考文献 (10)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ