The Strength of as Cast Iron and Normalized Cast Iron Subjected to Cyclic Loading

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LEONAVIČIUS, Mindaugas ;KRENEVIČIUS, Algimantas ;STUPAK, Stanislav ;PETRAITIS, Gediminas ;ŠUKŠTA, Marijonas ;BAZARAS, Živilinas .
The Strength of as Cast Iron and Normalized Cast Iron Subjected to Cyclic Loading. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 52, n.9, p. 558-567, august 2017. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/the-strength-of-as-cast-iron-and-normalized-cast-iron-subjected-to-cyclic-loading/>. Date accessed: 05 jun. 2020. 
doi:http://dx.doi.org/.
Leonavičius, M., Krenevičius, A., Stupak, S., Petraitis, G., Šukšta, M., & Bazaras, .
(2006).
The Strength of as Cast Iron and Normalized Cast Iron Subjected to Cyclic Loading.
Strojniški vestnik - Journal of Mechanical Engineering, 52(9), 558-567.
doi:http://dx.doi.org/
@article{.,
	author = {Mindaugas  Leonavičius and Algimantas  Krenevičius and Stanislav  Stupak and Gediminas  Petraitis and Marijonas  Šukšta and Živilinas  Bazaras},
	title = {The Strength of as Cast Iron and Normalized Cast Iron Subjected to Cyclic Loading},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {52},
	number = {9},
	year = {2006},
	keywords = {cast iron; fatigue; fracture; threshold; cracks; },
	abstract = {This paper presents the results of an experimental and analytical investigation of the high-cycle fatigue of special as-cast and normalized irons, which later in the text are referred to as GI (grade iron) and SGI (spherical graphite iron). Well-known types of cast iron have been modified to achieve better mechanical properties and an improved resistance to crack formation and development as well as propagation. The defined values of the mechanical properties show that the normalizing changes the microstructure, enlarges the plasticity and makes uniform the limits of yield and strength. The microstructures of the investigated ascast irons include graphite of different sizes, which, after the heat treatment, acquire a spherical shape, unify and reduce in size, and the whole microstructure becomes finer. After testing the compact eccentric tension CT (ASTM) specimens, the crack-growth rate versus the stress intensity factor range for the fatigue diagrams were constructed, and the threshold stress intensity ranges were determined: for GI as cast iron DKth = 6.5 to 8.6 MPa m ; for GI normalized cast iron DKth = 8.2 to 10.3 MPa m ; for SGI as cast iron DKth = 8.0 to 9.6 MPa m , and for SGI normalized cast iron DKth = 8.7 to 9.8 MPa m . The significant differences in the threshold stress intensity factors were determined and related to the structural imperfections at the different sites of specimens formed during the manufacturing and normalization process. For specimens of as-cast and normalized cast iron, the dependence of DKth on the crack size was observed. An additional investigation and the fracture analysis show that it was influenced by the absence of structural uniformity. The suggested analytical expression of the DKth and the dependence of the mechanical properties can be applied for calculating the strength of cyclically loaded large-sized parts.},
	issn = {0039-2480},	pages = {558-567},	doi = {},
	url = {https://www.sv-jme.eu/article/the-strength-of-as-cast-iron-and-normalized-cast-iron-subjected-to-cyclic-loading/}
}
Leonavičius, M.,Krenevičius, A.,Stupak, S.,Petraitis, G.,Šukšta, M.,Bazaras, .
2006 August 52. The Strength of as Cast Iron and Normalized Cast Iron Subjected to Cyclic Loading. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 52:9
%A Leonavičius, Mindaugas 
%A Krenevičius, Algimantas 
%A Stupak, Stanislav 
%A Petraitis, Gediminas 
%A Šukšta, Marijonas 
%A Bazaras, Živilinas 
%D 2006
%T The Strength of as Cast Iron and Normalized Cast Iron Subjected to Cyclic Loading
%B 2006
%9 cast iron; fatigue; fracture; threshold; cracks; 
%! The Strength of as Cast Iron and Normalized Cast Iron Subjected to Cyclic Loading
%K cast iron; fatigue; fracture; threshold; cracks; 
%X This paper presents the results of an experimental and analytical investigation of the high-cycle fatigue of special as-cast and normalized irons, which later in the text are referred to as GI (grade iron) and SGI (spherical graphite iron). Well-known types of cast iron have been modified to achieve better mechanical properties and an improved resistance to crack formation and development as well as propagation. The defined values of the mechanical properties show that the normalizing changes the microstructure, enlarges the plasticity and makes uniform the limits of yield and strength. The microstructures of the investigated ascast irons include graphite of different sizes, which, after the heat treatment, acquire a spherical shape, unify and reduce in size, and the whole microstructure becomes finer. After testing the compact eccentric tension CT (ASTM) specimens, the crack-growth rate versus the stress intensity factor range for the fatigue diagrams were constructed, and the threshold stress intensity ranges were determined: for GI as cast iron DKth = 6.5 to 8.6 MPa m ; for GI normalized cast iron DKth = 8.2 to 10.3 MPa m ; for SGI as cast iron DKth = 8.0 to 9.6 MPa m , and for SGI normalized cast iron DKth = 8.7 to 9.8 MPa m . The significant differences in the threshold stress intensity factors were determined and related to the structural imperfections at the different sites of specimens formed during the manufacturing and normalization process. For specimens of as-cast and normalized cast iron, the dependence of DKth on the crack size was observed. An additional investigation and the fracture analysis show that it was influenced by the absence of structural uniformity. The suggested analytical expression of the DKth and the dependence of the mechanical properties can be applied for calculating the strength of cyclically loaded large-sized parts.
%U https://www.sv-jme.eu/article/the-strength-of-as-cast-iron-and-normalized-cast-iron-subjected-to-cyclic-loading/
%0 Journal Article
%R 
%& 558
%P 10
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 52
%N 9
%@ 0039-2480
%8 2017-08-18
%7 2017-08-18
Leonavičius, Mindaugas, Algimantas  Krenevičius, Stanislav  Stupak, Gediminas  Petraitis, Marijonas  Šukšta, & Živilinas  Bazaras.
"The Strength of as Cast Iron and Normalized Cast Iron Subjected to Cyclic Loading." Strojniški vestnik - Journal of Mechanical Engineering [Online], 52.9 (2006): 558-567. Web.  05 Jun. 2020
TY  - JOUR
AU  - Leonavičius, Mindaugas 
AU  - Krenevičius, Algimantas 
AU  - Stupak, Stanislav 
AU  - Petraitis, Gediminas 
AU  - Šukšta, Marijonas 
AU  - Bazaras, Živilinas 
PY  - 2006
TI  - The Strength of as Cast Iron and Normalized Cast Iron Subjected to Cyclic Loading
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - cast iron; fatigue; fracture; threshold; cracks; 
N2  - This paper presents the results of an experimental and analytical investigation of the high-cycle fatigue of special as-cast and normalized irons, which later in the text are referred to as GI (grade iron) and SGI (spherical graphite iron). Well-known types of cast iron have been modified to achieve better mechanical properties and an improved resistance to crack formation and development as well as propagation. The defined values of the mechanical properties show that the normalizing changes the microstructure, enlarges the plasticity and makes uniform the limits of yield and strength. The microstructures of the investigated ascast irons include graphite of different sizes, which, after the heat treatment, acquire a spherical shape, unify and reduce in size, and the whole microstructure becomes finer. After testing the compact eccentric tension CT (ASTM) specimens, the crack-growth rate versus the stress intensity factor range for the fatigue diagrams were constructed, and the threshold stress intensity ranges were determined: for GI as cast iron DKth = 6.5 to 8.6 MPa m ; for GI normalized cast iron DKth = 8.2 to 10.3 MPa m ; for SGI as cast iron DKth = 8.0 to 9.6 MPa m , and for SGI normalized cast iron DKth = 8.7 to 9.8 MPa m . The significant differences in the threshold stress intensity factors were determined and related to the structural imperfections at the different sites of specimens formed during the manufacturing and normalization process. For specimens of as-cast and normalized cast iron, the dependence of DKth on the crack size was observed. An additional investigation and the fracture analysis show that it was influenced by the absence of structural uniformity. The suggested analytical expression of the DKth and the dependence of the mechanical properties can be applied for calculating the strength of cyclically loaded large-sized parts.
UR  - https://www.sv-jme.eu/article/the-strength-of-as-cast-iron-and-normalized-cast-iron-subjected-to-cyclic-loading/
@article{{}{.},
	author = {Leonavičius, M., Krenevičius, A., Stupak, S., Petraitis, G., Šukšta, M., Bazaras, .},
	title = {The Strength of as Cast Iron and Normalized Cast Iron Subjected to Cyclic Loading},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {52},
	number = {9},
	year = {2006},
	doi = {},
	url = {https://www.sv-jme.eu/article/the-strength-of-as-cast-iron-and-normalized-cast-iron-subjected-to-cyclic-loading/}
}
TY  - JOUR
AU  - Leonavičius, Mindaugas 
AU  - Krenevičius, Algimantas 
AU  - Stupak, Stanislav 
AU  - Petraitis, Gediminas 
AU  - Šukšta, Marijonas 
AU  - Bazaras, Živilinas 
PY  - 2017/08/18
TI  - The Strength of as Cast Iron and Normalized Cast Iron Subjected to Cyclic Loading
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 52, No 9 (2006): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - cast iron, fatigue, fracture, threshold, cracks, 
N2  - This paper presents the results of an experimental and analytical investigation of the high-cycle fatigue of special as-cast and normalized irons, which later in the text are referred to as GI (grade iron) and SGI (spherical graphite iron). Well-known types of cast iron have been modified to achieve better mechanical properties and an improved resistance to crack formation and development as well as propagation. The defined values of the mechanical properties show that the normalizing changes the microstructure, enlarges the plasticity and makes uniform the limits of yield and strength. The microstructures of the investigated ascast irons include graphite of different sizes, which, after the heat treatment, acquire a spherical shape, unify and reduce in size, and the whole microstructure becomes finer. After testing the compact eccentric tension CT (ASTM) specimens, the crack-growth rate versus the stress intensity factor range for the fatigue diagrams were constructed, and the threshold stress intensity ranges were determined: for GI as cast iron DKth = 6.5 to 8.6 MPa m ; for GI normalized cast iron DKth = 8.2 to 10.3 MPa m ; for SGI as cast iron DKth = 8.0 to 9.6 MPa m , and for SGI normalized cast iron DKth = 8.7 to 9.8 MPa m . The significant differences in the threshold stress intensity factors were determined and related to the structural imperfections at the different sites of specimens formed during the manufacturing and normalization process. For specimens of as-cast and normalized cast iron, the dependence of DKth on the crack size was observed. An additional investigation and the fracture analysis show that it was influenced by the absence of structural uniformity. The suggested analytical expression of the DKth and the dependence of the mechanical properties can be applied for calculating the strength of cyclically loaded large-sized parts.
UR  - https://www.sv-jme.eu/article/the-strength-of-as-cast-iron-and-normalized-cast-iron-subjected-to-cyclic-loading/
Leonavičius, Mindaugas, Krenevičius, Algimantas, Stupak, Stanislav, Petraitis, Gediminas, Šukšta, Marijonas, AND Bazaras, Živilinas.
"The Strength of as Cast Iron and Normalized Cast Iron Subjected to Cyclic Loading" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 52 Number 9 (18 August 2017)

Authors

Affiliations

  • Vilnius Gediminas Technical Univiversity, Deptartment Strength of Materials, Lithuania
  • Vilnius Gediminas Technical Univiversity, Deptartment Strength of Materials, Lithuania
  • Vilnius Gediminas Technical Univiversity, Deptartment Strength of Materials, Lithuania
  • Vilnius Gediminas Technical Univiversity, Deptartment Strength of Materials, Lithuania
  • Vilnius Gediminas Technical Univiversity, Deptartment Strength of Materials, Lithuania
  • Kaunas University of Technology, Department of Transport Engineering, Lithuania

Paper's information

Strojniški vestnik - Journal of Mechanical Engineering 52(2006)9, 558-567

This paper presents the results of an experimental and analytical investigation of the high-cycle fatigue of special as-cast and normalized irons, which later in the text are referred to as GI (grade iron) and SGI (spherical graphite iron). Well-known types of cast iron have been modified to achieve better mechanical properties and an improved resistance to crack formation and development as well as propagation. The defined values of the mechanical properties show that the normalizing changes the microstructure, enlarges the plasticity and makes uniform the limits of yield and strength. The microstructures of the investigated ascast irons include graphite of different sizes, which, after the heat treatment, acquire a spherical shape, unify and reduce in size, and the whole microstructure becomes finer. After testing the compact eccentric tension CT (ASTM) specimens, the crack-growth rate versus the stress intensity factor range for the fatigue diagrams were constructed, and the threshold stress intensity ranges were determined: for GI as cast iron DKth = 6.5 to 8.6 MPa m ; for GI normalized cast iron DKth = 8.2 to 10.3 MPa m ; for SGI as cast iron DKth = 8.0 to 9.6 MPa m , and for SGI normalized cast iron DKth = 8.7 to 9.8 MPa m . The significant differences in the threshold stress intensity factors were determined and related to the structural imperfections at the different sites of specimens formed during the manufacturing and normalization process. For specimens of as-cast and normalized cast iron, the dependence of DKth on the crack size was observed. An additional investigation and the fracture analysis show that it was influenced by the absence of structural uniformity. The suggested analytical expression of the DKth and the dependence of the mechanical properties can be applied for calculating the strength of cyclically loaded large-sized parts.

cast iron; fatigue; fracture; threshold; cracks;