Effect of silicon content and aging time on density, hardness, toughness and corrosion resistance of sintered 303LSC–Si stainless steels

Wang, Wen-Fung; Wu, M.C.

doi:10.1016/j.msea.2006.03.050

Cited by 22 publications

(6 citation statements)

References 12 publications

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“…In contrast, the precipitation phase was enriched with Cr and N while depleted in Fe, Co Ni and Mn, as can be seen from the EDS composition in Tables 2 and 3. This was observed for both the samples of Figures 13 and 14 [44,45]. XRD measures confirmed the presence in the samples of an FCC matrix and of a Cr-rich phase, Figure 8.…”

Section: Microstructure Evolution Of Selective Laser-melted Equiatomi...supporting

confidence: 67%

Microstructural Study of CrNiCoFeMn High Entropy Alloy Obtained by Selective Laser Melting

Campari

Casagrande

2022

Materials

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The high entropy alloy (HEA) of equiatomic composition CrNiFeCoMn and with FCC crystal structure was additively manufactured in a selective laser melting (SLM) process starting from mechanically alloyed powders. The as-produced alloy shows fine nitride and σ phase precipitates, which are Cr-rich and stable up to about 900 K. The precipitates increase in number and dimensions after long-period annealing at 900–1300 K, with a change in the HEA mechanical properties. Higher aging temperatures in the furnace, above 1300 K, turn the alloy into a single FCC structure, with the disappearance of the nitride and σ phase precipitates inside the grains and at the grain boundaries, but still with the presence of a finer Cr-rich nitride precipitation phase. These results suggest that the as-produced HEA is a supersaturated solid solution at low and intermediate temperature with nitrides and σ nanostructures.

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Section: Microstructure Evolution Of Selective Laser-melted Equiatomi...supporting

confidence: 67%

Microstructural Study of CrNiCoFeMn High Entropy Alloy Obtained by Selective Laser Melting

Campari

Casagrande

2022

Materials

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show abstract

“…On the contrary, the precipitation phase is enriched with Cr and N while depleted in Fe, Co Ni and Mn, as can be seen from the EDS composition in tables 2 and 3. This is observed for both the samples of figure 13 and figure 14 [40,41]. XRD measures confirm the presence in the samples of an FCC matrix and of a Cr-rich phase, figure 8.…”

Section: Microstructure Evolutions Of Selective Laser-melted Equiatom...supporting

confidence: 65%

Microstructural Study of CrNiCoFeMn High Entropy Alloy Obtained by Selective Laser Melting

Campari¹,

Casagrande²

2022

Preprint

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The high entropy alloy (HEA) of equiatomic composition CrNiFeCoMn and with FCC crystal structure was additively manufactured with a selective laser melting (SLM) process starting from mechanically alloyed powders. The as produced alloy shows finenitride and  phase pre-cipitates, which are Cr-rich and stable up to about 900 K. The precipitates increase in number and dimensions after long-period annealing at 900-1300 K, with a change in the HEA mechanical properties. Higher aging temperatures in furnace, above 1300 K, turn the alloy in a single FCC structure, with disappearance of the nitrate and  phase precipitates inside the grains and at the grain boundaries, but with still a presence of a finer Cr-rich nitride precipitation phase. These re-sults suggest that the as-produced HEA is a supersatured solid solution at low and intermediate temperature with nitrides and  nanostructures.

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“…Similarly, Tsai et al [ 38 ] confirmed the beneficial effect of Si on the improvement in corrosion resistance due to the Si enrichment of the passive layer. These studies [ 37 , 38 , 58 ] confirmed that Si did indeed affect the overall quality of the passive layer formed on SSs.…”

Section: Discussionmentioning

confidence: 83%

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

et al. 2022

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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.

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Effect of silicon content and aging time on density, hardness, toughness and corrosion resistance of sintered 303LSC–Si stainless steels

Cited by 22 publications

References 12 publications

Microstructural Study of CrNiCoFeMn High Entropy Alloy Obtained by Selective Laser Melting

Microstructural Study of CrNiCoFeMn High Entropy Alloy Obtained by Selective Laser Melting

Microstructural Study of CrNiCoFeMn High Entropy Alloy Obtained by Selective Laser Melting

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

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