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Title of Journal: Metall and Mat Trans A

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Abbravation: Metallurgical and Materials Transactions A

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Springer US

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DOI

10.1002/hep.20622

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1543-1940

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Influence of Sintering under Nitrogen Atmosphere on Microstructures of Powder Metallurgy Duplex Stainless Steels

Authors: C. García, F. Martin, Y. Blanco, M.P. de Tiedra, M.L. Aparicio,

Publish Date: 2009/01/07
Volume: 40, Issue:2, Pages: 292-301
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Abstract

Duplex stainless steels (SS) obtained through powder metallurgy (PM) from austenitic AISI 316L and ferritic AISI 430L powders were mixed in different amounts to obtain a biphasic structure with an austenite/ferrite ratio of 50/50, 65/35, and 85/15. Prepared powders were compacted at 750 MPa and sintered in N2-H2 (95 pct–5 pct) at 1250 °C for 1 hour. Some samples sintered in vacuum were taken as references. Optical metallography, X-ray diffraction, and scanning electron microscopy/energy dispersive analysis of X-rays were used for microstructural characterization. Powder metallurgy base materials, AISI 430L and 316L, showed a single lamellar constituent after sintering in nitrogen. A mixed constituent was identified in PM duplex SS sintered in nitrogen and in vacuum. However, coarse and fine lamellar constituents were only present in PM duplex SS sintered in nitrogen. The effects of annealing solution heat treatment (1150 °C) on microstructures were evaluated. Homogeneous structures were obtained for the PM base materials, while for PM duplex SS, annealing dissolved lamellar constituents but mixed constituent were still present.


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Other Papers In This Journal:

  1. Influence of Sintering under Nitrogen Atmosphere on Microstructures of Powder Metallurgy Duplex Stainless Steels
  2. Temperature Dependence of Diffuse Scattering in PZN
  3. Synthesis and Characterization of Novel Chromium-Free Nickel Alloy Electrode Materials
  4. Synthesis and Characterization of Novel Chromium-Free Nickel Alloy Electrode Materials
  5. XPS Analysis of Ti6Al4V Oxidation Under UHV Conditions
  6. Effect of Sr Additions on the Microstructure and Strength of a Mg-Al-Ca Ternary Alloy
  7. Failure during Sheared Edge Stretching of Dual-Phase Steels
  8. Computer-Aided Development and Simulation Tools for Shape-Memory Actuators
  9. Computer-Aided Development and Simulation Tools for Shape-Memory Actuators
  10. Effects of Alloying Elements on Microstructure and Properties of Magnesium Alloys for Tripling Ball
  11. Microstructural Control of Ti-Al-Nb-W-B Alloys
  12. Controlling Plastic Flow across Grain Boundaries in a Continuum Model
  13. Mechanical Properties of the TiAl IRIS Alloy
  14. Precipitation Modeling in Nitriding in Fe-M Binary System
  15. Nanoscale Copper and Copper Compounds for Advanced Device Applications
  16. A Geometric Framework for Mesoscale Models of Recrystallization
  17. Laser Quenching of Ionic Nitrided Steel: Effect of Process Parameters on Microstructure and Optimization
  18. Effect of Alloying Additions on Phase Equilibria and Creep Resistance of Alumina-Forming Austenitic Stainless Steels
  19. Shape Memory Behavior of Porous NiTi Alloy
  20. Effect of Laves Phase on High-Temperature Deformation and Microstructure Evolution in an 18Cr-2Mo-0.5Nb Ferritic Stainless Steel
  21. Effect of Graphene Nanoplatelets on Wetting
  22. Measurement and Discussion of Low-Temperature Hot Corrosion Damage Accumulation upon Nickel-Based Superalloy Rene 104

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