The effect of particle size of iron powder on α to γ transformation in the nanostructured high nitrogen Fe–Cr–Mn–Mo stainless steel produced by mechanical alloying

Tehrani, F.; Abbasi, M.H.; Golozar, M.A.; Panjepour, Masoud

doi:10.1016/j.msea.2010.12.043

Cited by 14 publications

(2 citation statements)

References 27 publications

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“…In order to prevent any possible error, three steps of measurement were performed in each section, and also holes, cracks, and grooves were avoided to reduce errors. In order to prevent the influence of stress fields provoked by the nearby indentations as per ASTM specification, more than 2.5 times the diagonal was considered for the distance between the indentations for all samples [23].…”

Section: Vickers Microhardness Testmentioning

confidence: 99%

Surface mechanical coating of Cu plate by Cu Al powders

Farahbakhsh

Mashimo

2018

Surface Engineering

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Through Surface Mechanical Coating (SMC), a plate of pure Cu was successfully coated using of Al-50-wt% Cu during mechanical alloying. Effect of milling time and heat treatment on formation of coating at 1050 °C was investigated. Compositional and microstructural study of the coating and its properties were conducted by means of X-Ray Diffraction (XRD), Microfocus XRD, Scanning Electron Microscopic (SEM), Electron Probe Micro-Analyzer (EPMA), Transition Electron Microscopic (TEM), and Vickers Microhardness test. Analyses results showed that Al4Cu9, Cu(Al), and AlCu3 phases were formed. The results also showed that heating causes the composite coating created by SMC to be replaced with moderate concentrations of Cu and Al. Through heat treatment, coating hardness will be reduced to even half, while thickness has a twofold increase. As milling time rises, atomic diffusion depth for heated samples will be raised also. TEM investigations approved the presence of amorphous phase and 10nm grain size.

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Section: Vickers Microhardness Testmentioning

confidence: 99%

Surface mechanical coating of Cu plate by Cu Al powders

Farahbakhsh

Mashimo

2018

Surface Engineering

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“…Therefore, during sintering, N 2 atoms easily diffuse into Fe lattice through shorter diffusion paths and piled in defect storage sites. The increased ratio of lattice strain to grain size increases the preferable lattice storage sites for nitrogen absorption [49] and thereby enhances the a-Fe to c-Fe phase transformation. All the above explanation provides more evidence that nitrogen acts as austenitic stabilizer.…”

Section: Compressive Strengthmentioning

confidence: 99%

Effects of Nano-Y2O3 and Sintering Parameters on the Fabrication of PM Duplex and Ferritic Stainless Steels

Rajendrachari

Chaira

2016

Acta Metall. Sin. (Engl. Lett.)

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Here we report the effects of nano-Y 2 O 3 addition, sintering atmosphere and time during on the fabrication of PM duplex and ferritic stainless steels composites by dual-drive planetary milling of elemental Fe, Cr and Ni powders followed by conventional pressureless sintering. Yttria-free and yttria-dispersed duplex and ferritic stainless steels are fabricated by conventional sintering at 1000, 1200 and 1400°C temperatures under argon atmosphere. In another set of experiment, yttria-free and yttria-dispersed duplex and ferritic stainless steels are consolidated at 1000°C for 1 h under nitrogen atmosphere to study the effect of sintering atmosphere. It has been found that densities of duplex and yttriadispersed duplex stainless steel increase from 71% to 91% and 78% to 94%, respectively, with the increase in sintering temperature. Similarly, hardness value increases from 257 to 567 HV 25 in case of duplex, and from 332 to 576 HV 25 in yttria-dispersed duplex stainless steel. X-ray diffraction analysis shows the domination of more intense austenite phase than ferrite at higher sintering temperature and also in nitrogen atmosphere. It is also evident that addition of yttria enhances phase transformation from a-Fe to c-Fe. Duplex and yttria-dispersed duplex stainless steels exhibit the maximum compressive yield strength of 360 and 312 MPa, respectively.

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Synthesis of austenitic stainless steel powder alloys by mechanical alloying

Al-Joubori

Suryanarayana

2017

J Mater Sci

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The effect of particle size of iron powder on α to γ transformation in the nanostructured high nitrogen Fe–Cr–Mn–Mo stainless steel produced by mechanical alloying

Cited by 14 publications

References 27 publications

Surface mechanical coating of Cu plate by Cu Al powders

Surface mechanical coating of Cu plate by Cu Al powders

Effects of Nano-Y2O3 and Sintering Parameters on the Fabrication of PM Duplex and Ferritic Stainless Steels

Synthesis of austenitic stainless steel powder alloys by mechanical alloying

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