Geometrical Size Effect in High Cycle Fatigue Strength of Heavy-walled Ductile Cast Iron GJS400: Weakest Link vs Defect-based Approach

Fatigue failure is the most common failure mode of structural materials. In this study, the high-cycle fatigue properties at different temperatures, fracture surface morphologies and corresponding damage mechanisms of a widely used vermicular graphite cast iron RuT450 were investigated. It is found that the fatigue strength of RuT450 decreases with the increase of temperature, and the decreasing rate is affected by the change of morphology and content of graphite. In general, the cracks initiated from the graphite phase boundary and propagated through the pearlite lamellae. In addition, according to the change of matrix micro-structure and the slight change of graphite morphology at different temperatures, and combined with the change of crack propagation threshold value under different temperature conditions, a fatigue strength prediction method for vermicular graphite cast iron at different temperatures was proposed in this work, which has high prediction accuracy.

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Effect of Shot Peening Treatment on High Cycle Fatigue Property in Long Life Regime of Austempered Ductile Cast Iron

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A ◽

10.1299/kikaia.71.1488 ◽

2005 ◽

Vol 71 (711) ◽

pp. 1488-1493 ◽

Cited By ~ 3

Author(s):

Kiyotaka MASAKI ◽

Yasuo OCHI ◽

Takusabuo HOSOYA ◽

Takashi MATSUMURA

Keyword(s):

Cast Iron ◽

Shot Peening ◽

High Cycle Fatigue ◽

Fatigue Property ◽

Ductile Cast Iron ◽

Cycle Fatigue ◽

Long Life ◽

Austempered Ductile Cast Iron

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Influence of Size Effect and Stress Gradient on the High-cycle Fatigue Strength of a 1.4542 Steel

Procedia Engineering ◽

10.1016/j.proeng.2016.08.863 ◽

2016 ◽

Vol 160 ◽

pp. 61-68 ◽

Cited By ~ 7

Author(s):

Igor Milošević ◽

Gerhard Winter ◽

Florian Grün ◽

Martin Kober

Keyword(s):

Fatigue Strength ◽

Size Effect ◽

High Cycle Fatigue ◽

Stress Gradient ◽

Cycle Fatigue

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Effect of shot-peening treatment on high cycle fatigue property of ductile cast iron

International Journal of Fatigue ◽

10.1016/s0142-1123(00)00110-9 ◽

2001 ◽

Vol 23 (5) ◽

pp. 441-448 ◽

Cited By ~ 85

Author(s):

Y Ochi

Keyword(s):

Cast Iron ◽

Shot Peening ◽

High Cycle Fatigue ◽

Fatigue Property ◽

Ductile Cast Iron ◽

Cycle Fatigue

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Effects of Surface Hardness on High-Cycle Fatigue of Austempered Ductile Cast Iron.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A ◽

10.1299/kikaia.62.589 ◽

1996 ◽

Vol 62 (595) ◽

pp. 589-593

Author(s):

Shigeru DOI ◽

Syoji HARADA ◽

Masao TAKAHARA ◽

Takeshi HIROYASU ◽

Hideo IKEDA

Keyword(s):

Cast Iron ◽

High Cycle Fatigue ◽

Surface Hardness ◽

Ductile Cast Iron ◽

Cycle Fatigue ◽

Austempered Ductile Cast Iron

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Reliability prediction, scatter-band analysis and fatigue limit assessment of high-cycle fatigue properties in EN-GJS700-2 ductile cast iron

MATEC Web of Conferences ◽

10.1051/matecconf/201816510012 ◽

2018 ◽

Vol 165 ◽

pp. 10012 ◽

Cited By ~ 1

Author(s):

Mohammad Jamalkhani Khameneh ◽

Mohammad Azadi

Keyword(s):

Cast Iron ◽

Fatigue Limit ◽

High Cycle Fatigue ◽

Likelihood Estimation ◽

Ductile Cast Iron ◽

Fatigue Properties ◽

Cycle Fatigue ◽

Test Methodology ◽

Standard Specimens ◽

Statistical Trends

In this article, high-cycle fatigue properties of the EN-GJS700-2 ductile cast iron were experimentally examined, using the four-point rotary-bending fatigue machine. Such material has been widely utilized for manufacturing crankshafts in automotive industries. Therefore, standard specimens were extracted from the crankshaft to consider the manufacturing effect. The other aim of this work is to develop a model, anticipating the probabilistic behavior of the EN-GJS700-2 ductile cast iron. For such objective, the parametric analysis of the most commonly used statistical distributions were performed and compared. Based on the best fitted distribution function on experimental data, fatigue lifetime reliability specifications of the material were analyzed and represented through probabilistic modeling. In addition, the S-N diagram with its scatter-band were conducted at different values of the confidence level. As another investigation, the criterion for designing the crankshaft is the infinite lifetime, or in more practical terms, is the design with allowable stress levels, below the fatigue limit. Based on the staircase test methodology, fatigue endurance limit tests were conducted. Then, statistical trends of the fatigue limit were analyzed by the Dixon-Mood method, based on the maximum likelihood estimation. Obtained results represents that the fatigue limit was 211 MPa for the ductile cast iron.

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