耐熱綱 SUH 660 綱の低サイクル疲労特性の温度, ひずみ速度依存性
スポンサーリンク
概要
- 論文の詳細を見る
Low-cycle fatigue tests were carried out on precipitation hardening, heat resisting steel, JIS SUH 660, at room temperature, 450, 600 and 700℃ under a triangular strain waveform for which the strain rate was 40, 4 or 0. 4%/min. The results obtained are summarized as follows : (1) The stress range decreased or increased first and then decreased with increasing strain cycles depending on the test condition. The strain rate dependence of the cyclic stress-strain relation was scarcely observed at temperatures up to 600℃. At 700℃ stress was smaller for the strain rate of 0. 4%/min than that for 40%/min. (2) For the relation between the plastic strain range and the number of cycles to failure, the strain rate dependence was scarcely observed at room temperature and 450℃, but the number of cycles to failure decreased with decreasing strain rate at 600 and 700℃. The temperature dependence of the relation was clearly found at temperatures from room temperature to 600℃, but there was no difference between the relations at 600 and 700℃. (3) Transgranular fracture surface covered with striations and small dimples were observed for the specimens tested at room temperature and 450℃. Intergranular fracture occurred at 600 and 700℃. (4) For the temperature range at which transgranular fracture occurs, the temperature dependence of the Δε_p-N_f relation could be explained by the mechanical parameter Δε_p(Δσ/σ_u)^2 which was introduced by Tomkins. (5) For the temperature range at which intergranular fracture occurs, the relation α = 1/(1+an) was obtained, where α is a constant value of 4〜6 and α and n are exponents of Δε_p-N_f and Δε_p-Δσ relations, respectively.
- 社団法人日本材料学会の論文
- 1981-09-15
著者
関連論文
- 各種実用鋼の高温高サイクル疲労における酸化効果
- 炭素鋼S45Cの中高温度域における高サイクル疲労特性の速度効果
- 各種実用鋼の高サイクル疲労強度の温度および形状係数依存性
- 519 高温高サイクル疲労強度と停留き裂の関係(高温腐食, 高温疲労, 材料, 日本鉄鋼協会第 114 回(秋季)講演大会)
- 518 炭素鋼板 SB46 鋼の中高温度域における高サイクル疲労特性(高温腐食, 高温疲労, 材料, 日本鉄鋼協会第 114 回(秋季)講演大会)
- 621 各種実用鋼の高温高サイクル疲労強度(耐熱鋼, 耐熱合金 (II) : 低合金鋼, オーステナイトステンレス鋼, 材料, 日本鉄鋼協会第 112 回(秋季)講演大会)
- 673 炭素鋼の中高温度域における高サイクル疲労特性の速度効果(耐熱鋼・耐熱合金 (III), 材料, 日本鉄鋼協会第 111 回(春季)講演大会)
- 546 長時間クリープ疲れ試験機の開発(疲労・腐食疲労・高温疲労, 材料, 日本鉄鋼協会第 109 回(春季)講演大会)
- 512 2 1/4Cr-1Mo 鋼鋼板の高温高サイクル疲労特性(疲労, 材料, 日本鉄鋼協会第 108 回(秋季)講演大会)
- 低合金鋼の高温回転曲げ疲労き裂伝ぱ挙動