Paper Information

Journal:   AMIRKABIR   SUMMER 2003 , Volume 14 , Number 55-B; Page(s) 780 To 789.
 
Paper: 

MICROSTRUCTURE AND DENSIFICATION RELATIONSHIP TO THE MANUFACTURING PARAMETERS IN LASER SINTERING OF IRON POWERS

 
 
Author(s):  SIMCHI A.*
 
* department of Materials science and engineering shrif university of technology
 
Abstract: 

In this work, the effects of manufacturing parameters on the microstructure and densification of iron powders processed by direct laser sintering were investigated. A specific energy parameter E, which expresses the energy input per volume of tire sintered layer, was defined and used to evaluate the impact of the parameters on the densification and the attendant micro structural features. The results show that the sintered density is an exponential function of the defined Specific energy. With increasing the energy input up to 2kj/mm3, the densification rate is relatively high. Here, the microstructure consists of bin pores (.5-1mm) and elongated ferrite grains. The densification rate will be decreased if the energy input exceeds 0.2 kJ/mm3 With intensifying the energy over 0.8 kJ/mm3, the formation of horizontally oriented cracks is likely to occur while the deflsit1 remains almost constant.

 
Keyword(s): DIRECT METAL LASER SINTERING, DENSIFICATION MECHANISM, MICROSTRUCTURE, IRON
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 42
 
Latest on Blog
Enter SID Blog