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Microstructure and fatigue strength of A356 alloy castings refined on the surface by rapid crystallization

  • A. W. Or艂owicz EMAIL logo and M. Mr贸z
Published/Copyright: February 3, 2022
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 94 Issue 12

Abstract

The effect of the microstructure on the fatigue strength of A356 alloy castings with a surface refined through rapid crystallization has been investigated. The refinement of the structure, in order to improve the fatigue strength of the alloy surface, was accomplished with an electric arc plasma. The surface fusions were made in helium atmosphere by changing the welding current intensity from 100 to 300 A and the arc advance speed from 200 to 600 mm/min. The rapid crystallization reduced the parameters 饾渾1 and 饾渾2 of the 饾渾 phase dendrites and 饾渾E of the eutectic, compared to the initial material. The parameter 饾渾E changed by a factor of nearly 3. The structural refinement was determined by the amount of heat input into the fusion area. The fatigue strength increased with decreasing values of the 位 parameters of the structure.

Keywords: A356 alloy; Rapid crystallization; Fatigue strength; Hardness
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Received: 2003-01-14
Published Online: 2022-02-03

漏 2003 Carl Hanser Verlag, M眉nchen

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  18. Personal/Personelles
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https://doi.org/10.1515/ijmr-2003-0238
Keywords for this article
A356 alloy; Rapid crystallization; Fatigue strength; Hardness

Articles in the same Issue

  1. Frontmatter
  2. Articles/Aufs盲tze
  3. Thermodynamics of liquid Al鈥揑n, Ag鈥揑n and In鈥揝b alloys from a four-atom cluster model
  4. Enthalpies of mixing of liquid Al鈥揊e鈥揋e alloys
  5. EMF study of liquid Al鈥揊e鈥揋e alloys
  6. Activity measurements of Ga in liquid Ga鈥揟l alloys by EMF method with zirconia solid electrolyte
  7. Effect of microstructural variation on the Cu/CK45 carbon steel friction weld joint
  8. Thermal loading of steel in molten aluminium
  9. Effect of modes of rolling on evolution of texture in pure copper and some copper base alloys
  10. Microstructure and fatigue strength of A356 alloy castings refined on the surface by rapid crystallization
  11. The shape of extrusions and intrusions produced by cyclic straining
  12. The fracture toughness of Mg2Si determined by 3-point bending and the indentation microcracking method
  13. Fabrication of Mo coatings on cast-iron substrates by a plasma spray system
  14. Influence of Cu and Sn addition on the corrosion resistance of AISI 304 stainless steel in acid media
  15. Editorial
  16. Laudatio in honour of Professor Herbert Gleiter
  17. Notifications/Mitteilungen
  18. Personal/Personelles
  19. Books/B眉cher
  20. News
  21. DGM Events
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