Evolution of residual stress states in surface layers of an AISI D2 steel treated by low energy high current pulsed electron beam

Zhang, K. M.; Zou, Jianxin; Bolle, Bernard; Grosdidier, Thierry

doi:10.1016/j.vacuum.2012.03.061

Cited by 74 publications

(26 citation statements)

References 26 publications

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“…Compared to widely used laser, plasma, and ion beam treatments, the HCPEB provides narrower energy distribution, better surface finish and wider energy density range [1][2][3][4] . With proper selection of operation parameters, various surface modification processes like surface quenching, annealing, impulse hardening, alloying and amorphization can be achieved by HCPEB treatments 5,6 . As a result, optimized mechanical strength, microhardness, wear and corrosion resistance may be obtained.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Aluminized Cu-10Fe Alloy by High Current Pulsed Electron Beam

et al. 2016

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A Cu-10Fe alloy with magnetron sputtered Al films was irradiated by high current pulsed electron beam (HCPEB) with various pulse numbers, next changes of its microstructure and corrosion property were investigated. Compared with the initial sample, microhardness and corrosion resistance of the aluminized Cu-10Fe alloys after the HCPEB treatment are remarkably improved with increasing pulse numbers. This improvement could be attributed to formation of Al 2 Cu intermetallic compounds, occurrence of liquid phase separation and grain refinement in the surface layer of the Cu-10Fe alloy during the process of rapid remelting and solidification induced by the HCPEB treatment.

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Section: Introductionmentioning

confidence: 99%

Surface Modification of Aluminized Cu-10Fe Alloy by High Current Pulsed Electron Beam

et al. 2016

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“…It is also possible, under appropriate conditions, to modify the surface properties of solids via thermal effects in conjunction with the mass transport. [1][2][3] The pulsed-plasma process is used to improve the surface properties of the workpieces of tool steels. [1][2][3][4][5][6] The pulsed-plasma system has high rates of heating and cooling.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] The pulsed-plasma process is used to improve the surface properties of the workpieces of tool steels. [1][2][3][4][5][6] The pulsed-plasma system has high rates of heating and cooling. These lead to the formation of a nano/microcrystalline structure, a high dislocation density and a growth of the concentration of the alloying elements and, thus, an intensification of the diffusion mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Surface behavior of AISI 4140 modified with the pulsed-plasma technique

Özbek¹,

Durman²

2015

Mater. Tehnol.

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In this study, the microstructure and surface properties of a low-alloy steel (AISI 4140) treated with pulsed plasma were investigated. Three different plasma-gun nozzle distances of (60, 70 and 80) mm and one battery capacity were chosen for a surface modification. The modified surface layers were examined using a light microscope and X-ray analyses were carried out for all the samples. The X-ray diffraction confirmed a development of new phases after the surface treatment. The samples were subjected to micro-hardness measurements and it was found that the hardness values of the modified surfaces were four times higher than those of the untreated samples. The samples were immersed into liquid nitrogen and then broken in a Charpy machine. The fractured surfaces were exposed to SEM and EDS analyses. At the end of the study, thin grains originating from the consumable electrode were detected. After the pulsed-plasma treatment, new structures were obtained. Keywords: pulsed plasma, fracture, consumable electrode, modification V tej {tudiji so bile preiskovane mikrostruktura in lastnosti povr{ine malolegiranega jekla (AISI 4140) po obdelavi s pulzirajo~o plazmo. Za spremembo povr{ine so bile izbrane tri razli~ne razdalje plazemske {obe od povr{ine: 60 mm, 70 mm in 80 mm, in kapaciteta ene baterije. Spremenjene povr{inske plasti so bile preiskovane s svetlobnim mikroskopom in izvr{ene so bile rentgenske analize. Rentgenska difrakcija je potrdila nastanek novih faz po obdelavi povr{ine. Na vzorcih so bile izvr{ene meritve mikrotrdote in ugotovljeno je bilo, da je trdota spremenjene povr{ine {tirikrat ve~ja od tiste pri neobdelanih vzorcih. Le-ti so bili potopljeni v teko~i du{ik in nato prelomljeni na napravi Charpy. Povr{ina preloma je bila analizirana s SEM in EDS. Odkrita so bila drobna zrna, ki izvirajo iz elektrode. Po obdelavi s pulzirajo~o plazmo je nastala nova mikrostruktura.

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“…The action of a high-energy pulse on the metal or alloy surface represents a single superfast thermal cycle of heating (melting) and cooling (quenching) with dynamic loading resulting in severe deformation [5]. All these processes in a single cycle change the chemical and phase compositions, giving rise to nonequilibrium microstructures, both in directly affected thin near-surface regions and in deeper materials layers [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Research results on low-energy high-current pulsed electron beam treatment of different materials, mainly steels, [1][2][3][4][5][6][8][9] show that the modified near-surface region can be divided into three successive layers differing in thickness: (1) a melted and rapidly quenched outer layer 1 m thick; (2) a high-temperature layer 10 m thick in which diffusion and diffusionless phase transformations, deformation, and recrystallization may occur; and (3) a layer of elastic wave action 100 m thick. Although it is generally recognized that the surface properties of material after low-energy high-current pulsed electron beam treatment are defined by the resulting state of its nearsurface microstructure and structural states formed in individual layers, there are still few studies that provide detailed structural analysis of these layers at different depths.…”

Section: Introductionmentioning

confidence: 99%

Nonequilibrium structural condition in the medical TiNi-based alloy surface layer treated by electron beam

Нейман¹,

Meisner²,

Лотков³

et al. 2014

AIP Conference Proceedings

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Abstract:The research is devoted to study the structural condition and their evolution from the surface to the depth of TiNi specimens treated by low-energy high-current electron beams with surface melting at a beam energy density E = 10 J/cm 2 , number of pulses N = 10, and pulse duration = 50 s. Determined thickness of the remelted layer, found that it has a layered structure in which each layer differs in phase composition and structural phase state. Refinement B2 phase lattice parameters in local areas showed the presence of strong inhomogeneous lattice strain.

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Evolution of residual stress states in surface layers of an AISI D2 steel treated by low energy high current pulsed electron beam

Cited by 74 publications

References 26 publications

Surface Modification of Aluminized Cu-10Fe Alloy by High Current Pulsed Electron Beam

Surface Modification of Aluminized Cu-10Fe Alloy by High Current Pulsed Electron Beam

Surface behavior of AISI 4140 modified with the pulsed-plasma technique

Nonequilibrium structural condition in the medical TiNi-based alloy surface layer treated by electron beam

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