Fatigue properties of high strength steels containing retained austenite

Yokoi, Toshiyuki; Kawasaki, K.; Takahashi, Manabu; Koyama, Kazuo; Mizui, Masaya

doi:10.1016/0389-4304(95)95096-d

Cited by 3 publications

(2 citation statements)

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“…At low and moderate strain amplitudes, where the transformation is sluggish, cyclic softening prevails in the materials with more stable RA (less RA transformation). In Yokoi et al, it has been discussed that transformation may result in the retardation of microcrack growth thus enhancing resistance to cyclic softening. As a result, the HT2x materials exhibit an extended cyclic softening behavior up to strain amplitudes of 0.6% (Figure ).…”

Section: Mechanical Behavior and Ra Transformationmentioning

confidence: 99%

Effect of retained austenite stability on cyclic deformation behavior of low‐alloy transformation‐induced plasticity steels

Christodoulou

Kermanidis

Haidemenopoulos

et al. 2019

Fatigue Fract Eng Mat Struct

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The retained austenite (RA) characteristics of Al‐containing TRIP700 steels have been manipulated using varying bainitic isothermal transformation (BIT) processing. The microstructural evolution was investigated using optical microscopy and quantitative image analysis, while the amount of transformed RA was evaluated with the saturation magnetization (SM) technique. Cyclic behavior is found to depend on the applied strain amplitude and stability of RA. At strain amplitudes with comparable elastic and plastic strain components, cyclic softening prevails, facilitated by more stable RA microstructures and Low Cycle Fatigue (LCF) performance benefits from a lower RA stability, which controls the amount of cyclic softening rate. With increasing plastic strain component, a transition to cyclic hardening is observed, and the transition strain increases with increasing RA stability. LCF performance deteriorates because of excessive cyclic strain hardening promoting martensitic transformation. The effect is accompanied by a transition from mixed dimple/cleavage to cleavage‐type fracture characteristics.

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Section: Mechanical Behavior and Ra Transformationmentioning

confidence: 99%

Effect of retained austenite stability on cyclic deformation behavior of low‐alloy transformation‐induced plasticity steels

Christodoulou

Kermanidis

Haidemenopoulos

et al. 2019

Fatigue Fract Eng Mat Struct

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“…As the century progressed, more and more failures of components subjected to repeated loads were recorded. Today, structural fatigue has assumed an even greater importance as a result of the ever-increasing use of high-strength materials and the desire for higher performance from these materials [1][2].…”

Section: Introductionmentioning

confidence: 99%

High Cycle Fatigue Performances of Advanced High Strength Steel CP800

Gui

Jin

et al. 2014

AMR

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A low carbon content and improved steel making practices have imparted advanced high strength steel (AHSS) CP800 with superior combination of strength, ductility and weldability. Its performance in fatigue, however, is not well understood. Stress-controlled high cycle fatigue (HCF) tests were conducted to obtain stress vs. fatigue life curve (S-N curve), and the fatigue limit of CP800. The follow HCF performances were obtained. , SRI1=1940MPa, b=-0.09972, Nc1=2.89×106, and R2= 0.88. The collected material data are used as a basis of comparison of CP800 with more common grades of structural steel. CP800 steel shows high strength, comparable ductility, and high fatigue limit level. The test results indicate that compare to that of lower strength common grades of structural steels, CP800 steel has a much higher fatigue endurance limit (say, 476MPa), about 0.6 of its tensile strength (TS). Thus, provides a distinct advantage.

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