Effect of Sintering Atmosphere and Solution Treatment on Density, Microstructure and Tensile Properties of Duplex Stainless Steels Developed from Pre-alloyed Powders

Murali, Arun; Mahendran, Sudhahar; Mariappan, R.; Dharmalingam, G.; Chinnaraj, Raj Kumar

doi:10.1007/s40033-016-0132-x

Cited by 4 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The comparison of the data presented above in Figure 6 (PDP scans), Figure 7 (LPR data), and Figure 8 (EIS spectra) highlights that the corrosion resistance of both ferritic and austenitic SS sintered specimens increased with an increase in Si content. Since corrosion resistance of PM parts is directly influenced by their densification as reported by many authors [ 17 , 45 , 51 , 52 ], one possible reason for the improvement in corrosion resistance properties is increased relative density of the higher wt % Si alloys as reported elsewhere [ 53 , 54 ]. The % of porosity in the sintered SS parts can directly influence the protectiveness of the oxide film developed on such materials.…”

Section: Discussionmentioning

confidence: 95%

“…The mechanical properties—especially corrosion resistance—of powder metallurgy (PM) steels is strongly dependent on the density of the sintered alloys. Many sintering parameters such as sintering temperature [ 13 ], holding time [ 51 ], heating rate [ 52 ], sintering environment [ 53 ], and applied pressure are crucial in obtaining a dense PM material. In a previous study [ 16 ], the authors systemically varied sintering temperature, holding time, heating rate, and applied pressure to obtain the maximum densification.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Insight into Structural Changes and Electrochemical Properties of Spark Plasma Sintered Nanostructured Ferritic and Austenitic Stainless Steels

et al. 2022

View full text Add to dashboard Cite

Nanostructured ferritic (Fe(82−x)-Cr18-Six, x = 0–3 wt %) and austenitic (Fe(73−x)-Cr18-Ni9-Six, x = 0–3 wt %) stainless steel (SS) alloys were developed by mechanical alloying (MA) and spark plasma sintering (SPS). The unit cell parameter estimated from X-ray diffraction spectra exhibited a decreasing trend with an increase in wt % of Si content in both alloy systems. The particle size of powders estimated using bright field transmission electron microscopy images for ferritic (3 wt % Si) and austenitic (3 wt % Si) SS powders was found to be 65 ± 5 nm and 18 ± 3 nm, respectively. In case of the ferritic system, 3 wt % Si exhibited the highest densification (~98%) and micro-hardness of about 350.6 ± 11.2 HV, respectively. Similarly, for the austenitic system (3 wt % Si), maximum densification and micro-hardness values were about 99% and 476.6 ± 15.2 HV, respectively. Comparative analysis of potentiodynamic polarization, linear polarization, and electrochemical impedance spectroscopy results indicates an increase in electrochemical performance of both alloy systems as the wt % Si was increased. The increase in electrochemical performance is directly related to the increase in densification owing to Si addition in these alloys.

show abstract