The long-range effect in ion implanted metallic materials: dislocation structures, properties, stresses, mechanisms

Sharkeev, Yu. P.; Козлов, Э. В.

doi:10.1016/s0257-8972(02)00212-8

Cited by 76 publications

(50 citation statements)

References 9 publications

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“…The experiments performed for Cu, Mo, Pt and α-Fe have shown the change of material properties far beyond the ion range, simulated e.g. using SRIM code [7,8]. This phenomena is called "long range effect" (LRE) because, as reported by some of the authors a change in the dislocation structure occurs at distances of tens of µm even when the predicted ion range was only a few hundred nm.…”

Section: Introductionmentioning

confidence: 94%

Defect Range and Evolution in Swift Xe-Ion Irradiated Pure Silver Studied by Positron Annihilation Technique

2017

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Variable energy positron beam and positron lifetime spectroscopy were used to study pure silver samples exposed to irradiation with swift Xe 26+ ions of energy 167 MeV with different dose: of 10 13 , 5×10 13 and 10 14 ions/cm 2 . The positron lifetime spectroscopy revealed the presence of dislocations or vacancies associated with dislocations. They are distributed at the depth of about 6 µm, and this correlates with the ion implantation range, i.e. 9 µm. However, some defects are observed also to a depth of about 18 µm. At the depth less than 1 µm from the entrance surface strong dependence of positron diffusion length on the dose is observed. It indicates the presence of interstitial atoms and/or dislocation loops as a result of Xe 26+ ions implantation.

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Section: Introductionmentioning

confidence: 94%

Defect Range and Evolution in Swift Xe-Ion Irradiated Pure Silver Studied by Positron Annihilation Technique

2017

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“…36,37 This increase in stress may be partly due to gallium implantation during the fabrication of the micropillars with the Ga + ion beam. [38][39][40] Depending on the accelerating voltage, Ga + ions can be found 10-20 nm from the surface at low voltages 38 and up to 1000 nm at high voltages. 40 Another possibility for the high twinning stress is a size effect for twinning induced plasticity similar to the dislocation nucleation controlled size effect encountered in micropillar studies of fcc metals.…”

Section: Discussionmentioning

confidence: 99%

Deformation twinning in Ni–Mn–Ga micropillars with 10M martensite

Reinhold

Kiener

Knowlton

et al. 2009

Journal of Applied Physics

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The maximum actuation frequency of magnetic shape-memory alloys ͑MSMAs͒ significantly increases with decreasing size of the transducer making MSMAs interesting candidates for small scale actuator applications. To study the mechanical properties of Ni-Mn-Ga single crystals on small length scales, two single-domain micropillars with dimensions of 10ϫ 15ϫ 30 m 3 were fabricated from a Ni-Mn-Ga monocrystal using dual beam focused ion beam machining. The pillars were oriented such that the crystallographic c direction was perpendicular to the loading direction. The pillars were compressed to maximum stresses of 350 and 50 MPa, respectively. Atomic force microscopy and magnetic force microscopy were performed prior to fabrication of the pillars and following the deformation experiments. Both micropillars were deformed by twinning as evidenced by the stress-strain curve. For one pillar, a permanent deformation of 3.6% was observed and ac twins ͑10M martensite͒ were identified after unloading. For the other pillar, only 0.7% remained upon unloading. No twins were found in this pillar after unloading. The recovery of deformation is discussed in the light of pseudoelastic twinning and twin-substrate interaction. The twinning stress was higher than in similar macroscopic material. However, further studies are needed to substantiate a size effect.

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“…So far, the effect has been detected only during microhardness measurements. Although it has been presented in several papers [1][2][3], its range is questionable due to the difficulty in determining the thickness of the layer with increased hardness by measurements performed with the use of a microhardness tester. A modified layer is penetrated by the indenter, which can be laterally supported by the layer; this leads to overestimation of the thickness of the layer.…”

Section: Introductionmentioning

confidence: 99%

“…It is assumed that the depth of the hardness tester indenter cannot exceed 1/10 of the thickness of the measured layer [4]. It has to be mentioned that the authors of papers [2,3] used a Vickers pyramid penetrating a depth of 1-5 µm at 15-20 g loads. The aim of the present study is to determine the thickness of a layer with improved tribological properties by measurements of the friction coefficient and wear of Ti6Al4V alloy.…”

Section: Introductionmentioning

confidence: 99%

“…For the first time, the magnitude of the long-range effect was determined on the basis of tribological investigations for AISI 3126L [5] and H11 [6]. The authors of paper [3] explain its occurrence by movement of implantation-induced radiation defects along the depth of the sample and defects accompanying penetration of the hardness indenter into the sample material. * corresponding author; e-mail: p.budzynski@pollub.pl…”

Section: Introductionmentioning

confidence: 99%

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Long-Range Effect in Ion-Implanted Titanium Alloys

Budzyński

Sielanko

2015

Acta Phys. Pol. A

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Surface modification of titanium alloy (Ti6Al4V) by nitrogen ion implantation and ion beam-assisted deposition (C, N) was investigated. The depth distribution of implanted nitrogen atoms was analysed using the Rutherford backscattering technique. Nitrogen implantation reduces the coefficient of friction and wear. A better effect can be obtained when nitrogen implantation is combined with carbon deposition. Based on the changes in the coefficients of friction and wear as well as profilograms of wear tracks, the improvement of the tribological properties was found at a depth exceeding nearly 5 times the range of the implanted nitrogen ions. Identification of the long-range effect for Ti6Al4V alloy was performed on the basis of tribological analyses. This study is a continuation of research conducted for AISI 316L and H11 steel.

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The long-range effect in ion implanted metallic materials: dislocation structures, properties, stresses, mechanisms

Cited by 76 publications

References 9 publications

Defect Range and Evolution in Swift Xe-Ion Irradiated Pure Silver Studied by Positron Annihilation Technique

Defect Range and Evolution in Swift Xe-Ion Irradiated Pure Silver Studied by Positron Annihilation Technique

Deformation twinning in Ni–Mn–Ga micropillars with 10M martensite

Long-Range Effect in Ion-Implanted Titanium Alloys

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