Microstructure and wear behavior of a porous nanocrystalline nickel-free austenitic stainless steel developed by powder metallurgy

Salahinejad, E.; Amini, Rasool; Marasi, M.; Hadianfard, M.J.

doi:10.1016/j.matdes.2009.10.008

Cited by 36 publications

(24 citation statements)

References 23 publications

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“…The main factors affecting grain boundary mobility in nanostructures are grain boundaries segregation, solute impurity, porosity, chemical ordering, and secondary phases [32,42,49]. In the high-nitrogen stainless steels synthesized by MA, the retarded grain growth causing the development of nanostructures after Table 1 Austenite grain size of mechanically alloyed stainless steels: as-milled (d0), after a heat treatment (d), heat treatment temperature (T), and heat treatment time (t).…”

Section: Grain Growth Kineticsmentioning

confidence: 99%

On the general outline of physical properties of amorphous-nanocrystalline Fe–Cr–Mn–N alloy powders prepared by mechanical alloying under nitrogen

Amini

Salahinejad

Bajestani

et al. 2011

Journal of Alloys and Compounds

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Section: Grain Growth Kineticsmentioning

confidence: 99%

On the general outline of physical properties of amorphous-nanocrystalline Fe–Cr–Mn–N alloy powders prepared by mechanical alloying under nitrogen

Amini

Salahinejad

Bajestani

et al. 2011

Journal of Alloys and Compounds

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“…[24,25]. Eventually, it is noted that aspects of sintering and mechanical behaviors of these mechanically alloyed Cr-Mn-N stainless steels have been recently focused [34][35][36][37].…”

Section: Estimation Of Interstitial Nitrogen Content In the Nanocrystalsmentioning

confidence: 99%

Crystal interstitial sites contribution to nitrogen supersaturation in mechanically alloyed Fe–Cr–Mn–N alloys

Salahinejad

Amini

Ghaffari

et al. 2010

Journal of Alloys and Compounds

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“…To resolve this issue, nickel-free stainless steels are being developed. 16,17,18,19,20 Note that the corrosion produces of other constitutes can be still disadvantageous when releasing at high levels, for example chromium.…”

mentioning

confidence: 99%

Is cell viability always directly related to corrosion resistance of stainless steels?

Salahinejad

Ghaffari

Vashaee

et al. 2016

Materials Science and Engineering: C

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It has been frequently reported that cell viability on stainless steels is improved by increasing their corrosion resistance. The question that arises is whether human cell viability is always directly related to corrosion resistance in these biostable alloys. In this work, the microstructure and in vitro corrosion behavior of a new class of medical-grade stainless steels were correlated with adult human mesenchymal stem cell viability. The samples were produced by a powder metallurgy route, consisting of mechanical alloying and liquid-phase sintering with a sintering aid of a eutectic Mn-Si alloy at 1050 °C for 30 and 60 min, leading to nanostructures. In accordance with transmission electron microscopic studies, the additive particles for the sintering time of 30 min were not completely melted. Electrochemical impedance spectroscopic experiments suggested the higher corrosion resistance for the sample sintered for 60 min; however, a better cell viability on the surface of the less corrosion-resistant sample was unexpectedly found. This behavior is explained by considering the higher ion release rate of the Mn-Si additive material, as preferred sites to corrosion attack based on scanning electron microscopic observations, which is advantageous to the cells in vitro. In conclusion, cell viability is not always directly related to corrosion resistance in stainless steels. Typically, the introduction of biodegradable and biocompatible phases to biostable alloys, which are conventionally anticipated to be corrosion-resistant, can be advantageous to human cell responses similar to biodegradable metals.

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Microstructure and wear behavior of a porous nanocrystalline nickel-free austenitic stainless steel developed by powder metallurgy

Cited by 36 publications

References 23 publications

On the general outline of physical properties of amorphous-nanocrystalline Fe–Cr–Mn–N alloy powders prepared by mechanical alloying under nitrogen

On the general outline of physical properties of amorphous-nanocrystalline Fe–Cr–Mn–N alloy powders prepared by mechanical alloying under nitrogen

Crystal interstitial sites contribution to nitrogen supersaturation in mechanically alloyed Fe–Cr–Mn–N alloys

Is cell viability always directly related to corrosion resistance of stainless steels?

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