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Comparison of fatigue crack growth rate of selective laser sintered RapidSteel via computational fracture mechanics

  • Ali Fethi Okyar , Deniz Uzunsoy and Burak Ozsoy
Published/Copyright: June 1, 2014
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 105 Issue 6

Abstract

The fatigue-crack growth behavior of materials manufactured by means of selective laser sintering was studied. In the process, specimens were prepared from metal powders (316 steel) into the desired shape by additive manufacturing technology, followed by sintering and infiltration in a suitable molten metal. The latter process was aimed at eliminating the inherent porosity associated with powder metallurgy. Porosity is known to adversely affect the fatigue-crack growth rate behavior of powder metallurgy components. Carefully conducted fatigue-crack growth rate tests (single-edge-notch four-point bending type) were carried out on RapidSteelTM and the results were compared with data of infiltrated low carbon steel in the literature. Finite element analysis was carried out as an intermediate step in order to validate the geometry factor calculations provided by empirical formulae. It was found that the fracture resistance of RapidSteel was higher compared with low-carbon copper infiltrated steel tempered at 177 °C and 428 °C, and same as that tempered at 704 °C.

Keywords: Finite element analysis; Fatigue-crack growth rate; Selective laser sintering; Powder metallurgy
*Correspondence address, Dr. Deniz Uzunsoy, Department of Metallurgy & Materials Engineering, Natural Sciences, Engineering and Architecture Faculty, Bursa Technical University, Gaziakdemir Mah. Mudanya Cad. No: 4/10, Osmangazi/Bursa, Turkey, E-mail:

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Received: 2013-08-07
Accepted: 2014-01-13
Published Online: 2014-06-01
Published in Print: 2014-06-12

© 2014, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111076
Keywords for this article
Finite element analysis; Fatigue-crack growth rate; Selective laser sintering; Powder metallurgy

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Thermodynamic modeling of the In–Pt–Sb system
  5. Classical controlled rolling of low C steels microalloyed with Ti and Mo
  6. Development of carbide intermetallic layer by electric discharge alloying on AISI-D2 tool steel and its wear resistance
  7. Comparison of fatigue crack growth rate of selective laser sintered RapidSteel via computational fracture mechanics
  8. Wear resistance and fracture mechanics of WC–Co composites
  9. Thermal expansion behavior of CNT/Ag nanocomposite
  10. Thermophysical properties of solid phase rhodium measured by the pulse calorimetry technique over a wide temperature range
  11. Influence of Co3O4 addition on the ionic conductivity and microstructural properties of yttria-stabilized zirconia (8YSZ)
  12. High-activity of Pd catalyst supported on antimony tin oxide for hydrogen peroxide electroreduction
  13. Investigation of low k interfacial layer characteristics of LaAlO3 thin films grown on Si (100)
  14. In-situ catalytic growth of MgAl2O4 spinel whiskers in MgO–C refractories
  15. Short Communications
  16. Preparation and characterization of boron nitride/carbon fiber composite with high specific surface area
  17. Crevice corrosion resistance of high alloyed materials in 3.5 % NaCl solution
  18. Effect of grain size on the microstructure and mechanical properties of Mg-4Y-3Nd-0.5Zr alloy
  19. People
  20. Professor Ulrich Martin on his 65th birthday
  21. DGM News
  22. DGM News
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