Structural Analysis and Design of Foundations: A Comprehensive Handbook for S...
Microstructure of Powder Metallurgy Stainless Steels.pdf
1. Microstructure of Powder Metallurgy Stainless Steels
Dr.R.Narayanasamy, B.E., M.Tech., M.Engg., Ph.D., (D.Sc.)
Retired Professor,
Department of Production Engineering,
National Institute of Technology,
Tiruchirappalli-620015, Tamil Nadu, India.
5. Microstructure of a AISI 316L stainless steel
Porosity
Austenite
grain
Twin
band
6. Microstructure of AISI 410S ferritic stainless steel;
As received
Ferrite
grain
Grain
Boundary
Chromium Carbides precipitates on the grain boundaries
7. Optical microstructure of duplex a, ferritic b stainless steel, yttria-dispersed duplex c and
yttria-dispersed ferritic d stainless steel samples sintered at 1000° C in argon atmosphere (P
Pores)
8. Optical microstructure of duplex a, ferritic b stainless steel, yttria-dispersed duplex c and
yttria-dispersed ferritic d stainless steel samples sintered at 1200 ° C in argon atmosphere (P
Pores)
9. Optical microstructure of duplex a, ferritic b stainless steel, yttria-dispersed duplex c and
yttria-dispersed ferritic d stainless steel samples sintered at 1400° C in argon atmosphere
(P Pores)
10. Optical microstructure of duplex a, ferritic b stainless steel, yttria-dispersed duplex c and
yttria-dispersed ferritic d stainless steel samples sintered at 1000, 1200 and 1400° C in argon
atmosphere (P Pores)
As the sintering temperature increases, the porosity size decreases
14. Microstructure and mechanical behavior of 316L stainless steel produced using sinter-based
extrusion additive manufacturing
Porosity Second phase particle
Grain boundary
15. Microstructure of a weld used in duplex stainless steel, 2205, 250X original magnification. A
color mixture of austenite, ferrite and sigma phases.