KBb番号/048応力緩和による変形
KBb番号:048
モード:変形
メカニズム①:クリープ
'メカニズム②:応力緩和
特徴:クリープによる応力緩和は,高温条件下(絶対温度で融点の約1/2以上)で,クリープひずみが時間とともに累積するため,弾性ひずみ成分がその分小さくなり,結果として応力が低減していくことである・クリープ破壊の初期段階の現象であり,クリープ疲労破壊の評価に考慮する必要がある・
主たる材料:炭素鋼,低合金鋼,ステンレス鋼,ニッケル基合金,銅合金
事例:
KBb番号:048
モード:変形
メカニズム①:クリープ
'メカニズム②:応力緩和
特徴:クリープによる応力緩和は,高温条件下(絶対温度で融点の約1/2以上)で,クリープひずみが時間とともに累積するため,弾性ひずみ成分がその分小さくなり,結果として応力が低減していくことである・クリープ破壊の初期段階の現象であり,クリープ疲労破壊の評価に考慮する必要がある・
主たる材料:炭素鋼,低合金鋼,ステンレス鋼,ニッケル基合金,銅合金
事例:
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