低温におけるSUS304鋼の繰返し塑性変形挙動
1993 年 59 巻 566 号 p. 2427-2434
詳細
1993 年 59 巻 566 号 p. 2427-2434
Cyclic plastic deformation of stainless steel 304 was experimentally investigated at low temperature of liquid nitrogen (77K) under combined loading conditions. Tubular specimens were subjected to cyclic loading under stress-controlled conditions. At low temperature, the material showed magnitudes of different hardening for the same strain in tensile and compressive loading directions. The characteristic hardening behavior caused a kind of mechanical ratchetting under cyclic loading. The hysteresis loops of stress-strain curves in cyclic loading were saturated with increasing cycle numbers. The saturated stress values depended on the loading condition. The values were represented by an equation accounting for cumulative plastic strain.
