Prediction of the Fatigue Strength Defining Mechanism of Nodular Cast Iron Based on Statistical Microstructural Features

2021 ◽  
Author(s):  
Joona Vaara ◽  
Miikka Väntänen ◽  
Jarkko Laine ◽  
Jukka Kemppainen ◽  
Tero Frondelius
Keyword(s):  
Cast Iron ◽  
Fatigue Strength ◽  
Nodular Cast Iron ◽  
Iron Based

scholarly journals Effect of residual stress on fatigue strength of induction hardened nodular cast iron.

1988 ◽  
Vol 37 (417) ◽  
pp. 631-636 ◽  
Author(s):  
Katsushi SARUKI ◽  
Akira YAMADA ◽  
Kazuyoshi OGAWA
Keyword(s):  
Residual Stress ◽  
Cast Iron ◽  
Fatigue Strength ◽  
Nodular Cast Iron

scholarly journals Influence of Aluminum on Fatigue Strength of Solution-Strengthened Nodular Cast Iron

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 311
Author(s):  
Christian Gebhardt ◽  
Johannes Nellessen ◽  
Andreas Bührig-Polaczek ◽  
Christoph Broeckmann
Keyword(s):  
Cast Iron ◽  
Fatigue Strength ◽  
Aluminum Content ◽  
Nodular Cast Iron ◽  
Fatigue Properties ◽  
Matrix Microstructure ◽  
Graphite Morphology ◽  
Wide Range ◽  
Negative Effect ◽  
High Silicon

The fatigue strength of high silicon-alloyed nodular cast iron is influenced by casting defects and graphite precipitates. The literature as well as the findings of this work show that these microstructural constituents can be tailored by controlling silicon microsegregation. In addition, segregations also affect the ferritic matrix microstructure locally. In the present work, silicon segregations in high silicon-alloyed ductile iron are specifically manipulated by small additions of aluminum. It was demonstrated how the aluminum content affects a wide range of microstructural constituents across a variety of length scales. Specimens from alloys with small additions of aluminum were fabricated and tested by rotating bending. Results show that the fatigue strength can be increased compared to a reference alloy with no aluminum. Microstructure analysis as well as fractography were performed concluding that microstructural changes could be attributed to the increased aluminum content, which allows the fatigue properties to be tailored deliberately. However, according to the results of this study, the negative effect of aluminum on castability and graphite morphology limits the maximum content to approximately 0.2 wt.%.

Study on the Low Cycle Fatigue Damage of Nodular Cast Iron Based on Elastic Modulus

2006 ◽  
Vol 324-325 ◽  
pp. 851-854
Author(s):  
Jin Hai Liu ◽  
Xiao Yan Hao ◽  
Guo Lu Li ◽  
Xue Bo Zhao ◽  
Gen Sheng Liu
Keyword(s):  
Cast Iron ◽  
Elastic Modulus ◽  
Fatigue Damage ◽  
Low Cycle Fatigue ◽  
Nodular Cast Iron ◽  
Damage Variable ◽  
Cycle Fatigue ◽  
Sensitive Parameter ◽  
Nodular Iron ◽  
Iron Based

The influence of fatigue ratio on the low cycle fatigue damage of nodular cast iron was investigated by measuring the elastic modulus. The results indicated that the elastic modulus of nodular cast iron is a sensitive parameter to the fatigue damage at low cycle. The fatigue damage variable of nodular cast iron increases with cycle ratio. At the beginning and end period of cycling, the damage of nodular iron increases sharply, and in the range of 0.2- 0.8 cycle ratio, the fatigue damage grows gradually.

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