Optimization of milling parameters for the synthesis of nano-structured duplex and ferritic stainless steel powders by high energy planetary milling

Rajendrachari, Shashanka; Chaira, D.

doi:10.1016/j.powtec.2015.03.007

Cited by 88 publications

(52 citation statements)

References 15 publications

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“…It is 16% lower than that of the steel produced by the melting process with the average density was 7.8 g/cm³. verified an increase in density values for the duplex stainless-steels starting from Fe-Cr-Ni powders produced by powder metallurgy at temperatures of Table 1 shows the average green densities which were 5.08 g/cm 3 . Also, the value measurement by the Archimedes method after the sintering.…”

Section: Resultsmentioning

confidence: 68%

“…Also, the value measurement by the Archimedes method after the sintering. After sintering, it was verified with the Archimedes method that the average density of the samples produced with adding 3% vanadium carbide was 6.57 g/cm 3 . It is 16% lower than that of the steel produced by the melting process with the average density was 7.8 g/cm 3 .…”

Section: Resultsmentioning

confidence: 98%

“…After sintering, it was verified with the Archimedes method that the average density of the samples produced with adding 3% vanadium carbide was 6.57 g/cm 3 . It is 16% lower than that of the steel produced by the melting process with the average density was 7.8 g/cm 3 . verified an increase in density values for the duplex stainless-steels starting from Fe-Cr-Ni powders produced by powder metallurgy at temperatures of 1000 • C, 1200 • C and 1400 • C. These authors found the highest values of sintered density to ferritic stainless-steel at 89% to 1400 • C following for 1200 • C with 83% of sintered density [11].…”

Section: Resultsmentioning

confidence: 98%

“…In the stainless-steel family, the stainless-steel duplex UNS S31803 has been widely used in many industrial sectors because of its surface physicochemical properties and resistance to corrosion, abrasion and antioxidation [2,3]. Duplex stainless-steels are steels in which the microstructure consists of two main phases: austenite (y-FCC) and ferrite (α-BCC) in equal proportions, which can combine the good properties of the ferritic and austenitic phases [3][4][5][6]. conductivity [34,35].…”

Section: Introductionmentioning

confidence: 99%

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A New Method to Recycle Stainless–Steel Duplex UNS S31803 Chips

Claudiney

Oliveira

Sachs

et al. 2018

Metals

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Due to the increased consumption of raw materials, energy, and the waste it generates, recycling has become very important and fundamental for the environment and the industrial sector. The production of duplex stainless-steel powders with the addition of vanadium carbide in the high energy mechanical milling process is a new method for recycling materials for the manufacture of components in the industrial sector. This study aims to reuse the chips from the duplex stainless-steel UNS S31803 by powder metallurgy with the addition of Vanadium carbide (VC). The mechanical milling was performed using a planetary ball mill for 50 h at a milling speed of 350 rpm and a ball-to-powder weight ratio of 20:1, and the addition of 3 wt % of VC. The material submitted to milling with an addition of carbide has a particle size of less than 140 µm. After milling, the sample went through a stress relief treatment performed at 1050 • C for 1 h and the isostatic compaction process loaded with 300 MPa. The sintered powders and material was characterized by scanning electron microscopy, X-ray diffraction, and micro-hardness tests. The milling process with an addition of 3% VC produced a particle size smaller than the initial chip size. The measurement of micrometric sizes obtained was between 26 and 132 µm. The sintered material had a measurement of porosity evaluated at 15%. The obtained density of the material was 84% compared to the initial density of the material as stainless-steel duplex UNS S31803. The value of the microhardness measurement was 232 HV. The material submitted for grinding presented the formation of a martensitic structure and after the thermal treatment, the presence of ferrite and austenite phases was observed. Thus, in conclusion, this study demonstrates the efficacy in the production of a metal-ceramic composite using a new method to recycle stainless-steel duplex UNS S31803 chips.

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Section: Resultsmentioning

confidence: 68%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A New Method to Recycle Stainless–Steel Duplex UNS S31803 Chips

Claudiney

Oliveira

Sachs

et al. 2018

Metals

View full text Add to dashboard Cite

show abstract

“…Changes in ratio of rotation of vials compared to disk [13,14], ball size [4,[15][16][17][18], mill speed [13][14][15]17,[19][20][21][22][23], filling ratio of vials [4,15,[18][19][20][21]24] and charge ratio [4,6,[25][26][27] have been studied to optimize the milling process.…”

Section: Introductionmentioning

confidence: 99%