Spreading of Cracks Due to Thermal Fatigue in Metal Molds

• Autorzy: Juraj Ružbarský , Witold Biały
• Języki publikacji: EN

Abstrakty

EN

The article deals with the formation and spread of cracks from thermal fatigue in metallic forms. For a detailed examination of the problem, it is necessary to describe the thermal side of the process and the mechanism of mechanical stressing of the material. For the heating of the material is valid where the thermal diffusivity of the material is exercised by the decision method. The stress of the material by heating from the die casting metal depends mainly on the physical properties of the material when the calculated stress does not exceed the yield point. Also, with the help of dislocations write the life to the origin of the cracks in the cycles eventually the share of this lifetime on the total lifetime in dependence on the mechanical and physical properties of the material. During operation tests the occurrence of the cracks on the mold surface was initiated by the inclusion or concentration of stress in the knurling effect of fine grooves after grinding. Other cracks occurred in the undersurface layer and their direction was statistically accidental. (original abstract)

Słowa kluczowe

EN

Materials science; Materials engineering; Metal industry

PL

Materiałoznawstwo; Inżynieria materiałowa; Przemysł metalowy

• Czasopismo: Multidisciplinary Aspects of Production Engineering
• Rocznik: 2018
• Tom: 1
• Strony: 11--18

Twórcy

autor

Juraj Ružbarský

• Technical University of Košice, Slovak Republic

autor

Witold Biały

• Silesian University of Technology, Poland

Bibliografia

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• Paško J. et al (2014). Die Casting Defects of Castings from Silumin, In: Applied Mechanics and Materials, Volume 510, pp 91-96.
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Identyfikatory

DOI

10.2478/mape-2018-0002