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Structural transformations in austenitic stainless steel induced by deuterium implantation: irradiation at 100 K.

Morozov O, Zhurba V, Neklyudov I, Mats O, Rud A, Chernyak N, Progolaieva V - Nanoscale Res Lett (2015)

Bottom Line: The maximum attainable concentration of deuterium in steel is C = 1 (at.D/at.met. = 1/1).It includes the formation of bands, body-centered cubic (bcc) crystal structure, and the ferromagnetic phase.At C ≥ 0.5, two hydride phases are formed in the steel, the decay temperatures of which are 240 and 275 K.

View Article: PubMed Central - PubMed

Affiliation: National Science Center "Kharkiv Institute of Physics and Technology", 1, Akademichna Street, 61108 Kharkiv, Ukraine.

ABSTRACT
Deuterium thermal desorption spectra were investigated on the samples of austenitic stainless steel 18Cr10NiTi preimplanted at 100 K with deuterium ions in the dose range from 3 × 10(15) to 5 × 10(18) D/cm(2). The kinetics of structural transformation development in the implantation steel layer was traced from deuterium thermodesorption spectra as a function of implanted deuterium concentration. At saturation of austenitic stainless steel 18Cr10NiTi with deuterium by means of ion implantation, structural-phase changes take place, depending on the dose of implanted deuterium. The maximum attainable concentration of deuterium in steel is C = 1 (at.D/at.met. = 1/1). The increase in the implanted dose of deuterium is accompanied by the increase in the retained deuterium content, and as soon as the deuterium concentration attains C ≈ 0.5 the process of shear martensitic structural transformation in steel takes place. It includes the formation of bands, body-centered cubic (bcc) crystal structure, and the ferromagnetic phase. Upon reaching the deuterium concentration C > 0.5, the presence of these molecules causes shear martensitic structural transformations in the steel, which include the formation of characteristic bands, bcc crystal structure, and the ferromagnetic phase. At C ≥ 0.5, two hydride phases are formed in the steel, the decay temperatures of which are 240 and 275 K. The hydride phases are formed in the bcc structure resulting from the martensitic structural transformation in steel.

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Deuterium thermodesorption spectra from 18Cr10NiTi steel samples implanted to doses: 3 × 1015D/cm2; 1.1 × 1016D/cm2; 1.8 × 1016D/cm2.
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Fig2: Deuterium thermodesorption spectra from 18Cr10NiTi steel samples implanted to doses: 3 × 1015D/cm2; 1.1 × 1016D/cm2; 1.8 × 1016D/cm2.

Mentions: The most characteristic deuterium thermodesorption spectra for different implanted deuterium doses are shown in Figure 1. It can be seen that at low implantation doses (see Figure 1), the thermodesorption spectrum of ion-implanted deuterium represents a single peak with the maximum at Tm = 405 K, which we call the peak a. The presence of a single peak in the deuterium thermodesorption spectrum at low D concentrations suggests the conclusion that it characterizes the formation of the phase state of deuterium solid solution in the steel (see Figure 2). The appearance of the second peak in the thermodesorption spectrum points to the completion of the phase state formation of deuterium solid solution in steel. The deuterium concentration present in the implantation layer corresponds to ~2 at.% D for a dose of 1.8 × 1016 D/cm2.Figure 1


Structural transformations in austenitic stainless steel induced by deuterium implantation: irradiation at 100 K.

Morozov O, Zhurba V, Neklyudov I, Mats O, Rud A, Chernyak N, Progolaieva V - Nanoscale Res Lett (2015)

Deuterium thermodesorption spectra from 18Cr10NiTi steel samples implanted to doses: 3 × 1015D/cm2; 1.1 × 1016D/cm2; 1.8 × 1016D/cm2.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385328&req=5

Fig2: Deuterium thermodesorption spectra from 18Cr10NiTi steel samples implanted to doses: 3 × 1015D/cm2; 1.1 × 1016D/cm2; 1.8 × 1016D/cm2.
Mentions: The most characteristic deuterium thermodesorption spectra for different implanted deuterium doses are shown in Figure 1. It can be seen that at low implantation doses (see Figure 1), the thermodesorption spectrum of ion-implanted deuterium represents a single peak with the maximum at Tm = 405 K, which we call the peak a. The presence of a single peak in the deuterium thermodesorption spectrum at low D concentrations suggests the conclusion that it characterizes the formation of the phase state of deuterium solid solution in the steel (see Figure 2). The appearance of the second peak in the thermodesorption spectrum points to the completion of the phase state formation of deuterium solid solution in steel. The deuterium concentration present in the implantation layer corresponds to ~2 at.% D for a dose of 1.8 × 1016 D/cm2.Figure 1

Bottom Line: The maximum attainable concentration of deuterium in steel is C = 1 (at.D/at.met. = 1/1).It includes the formation of bands, body-centered cubic (bcc) crystal structure, and the ferromagnetic phase.At C ≥ 0.5, two hydride phases are formed in the steel, the decay temperatures of which are 240 and 275 K.

View Article: PubMed Central - PubMed

Affiliation: National Science Center "Kharkiv Institute of Physics and Technology", 1, Akademichna Street, 61108 Kharkiv, Ukraine.

ABSTRACT
Deuterium thermal desorption spectra were investigated on the samples of austenitic stainless steel 18Cr10NiTi preimplanted at 100 K with deuterium ions in the dose range from 3 × 10(15) to 5 × 10(18) D/cm(2). The kinetics of structural transformation development in the implantation steel layer was traced from deuterium thermodesorption spectra as a function of implanted deuterium concentration. At saturation of austenitic stainless steel 18Cr10NiTi with deuterium by means of ion implantation, structural-phase changes take place, depending on the dose of implanted deuterium. The maximum attainable concentration of deuterium in steel is C = 1 (at.D/at.met. = 1/1). The increase in the implanted dose of deuterium is accompanied by the increase in the retained deuterium content, and as soon as the deuterium concentration attains C ≈ 0.5 the process of shear martensitic structural transformation in steel takes place. It includes the formation of bands, body-centered cubic (bcc) crystal structure, and the ferromagnetic phase. Upon reaching the deuterium concentration C > 0.5, the presence of these molecules causes shear martensitic structural transformations in the steel, which include the formation of characteristic bands, bcc crystal structure, and the ferromagnetic phase. At C ≥ 0.5, two hydride phases are formed in the steel, the decay temperatures of which are 240 and 275 K. The hydride phases are formed in the bcc structure resulting from the martensitic structural transformation in steel.

No MeSH data available.


Related in: MedlinePlus