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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: 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).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

Crystalline structure of austenitic stainless steel with deuterium concentrations (а)С = 0.5 at.D/at.met. and (b)С = 1 at.D/at.met.
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Fig8: Crystalline structure of austenitic stainless steel with deuterium concentrations (а)С = 0.5 at.D/at.met. and (b)С = 1 at.D/at.met.

Mentions: Based on the belief that deuterium atoms in the bcc crystal lattice of steel are in the charged state, are in octahedral sites, and at regular intervals, one can elaborate the arrangement of deuterium atoms in the hydride phase of steel with the deuterium concentration C = 1/2 at.D/at.met. = 0.5 (see Figure 8a, peak d in Figure 1). A further increase in the implanted deuterium concentration is accompanied by the formation of the lower-temperature hydride phase in the same crystal lattice, where the hydride structure with deuterium concentration C = 0.5 has already formed. This phase is formed due to both the newly implanted deuterium, and the earlier formed higher-temperature hydride phase (peak d). In this case, the local concentration of deuterium in the steel-lattice crystal structure reaches C = 1 at.D/at.met. (see Figure 8b, peak e in Figure 1). The decay of this lowest-temperature hydride phase in the deuterium thermodesorption spectrum is registered as a single peak. Note that in the Pd-D system, two stable hydride sublattices in palladium are also formed [42].Figure 8


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)

Crystalline structure of austenitic stainless steel with deuterium concentrations (а)С = 0.5 at.D/at.met. and (b)С = 1 at.D/at.met.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Fig8: Crystalline structure of austenitic stainless steel with deuterium concentrations (а)С = 0.5 at.D/at.met. and (b)С = 1 at.D/at.met.
Mentions: Based on the belief that deuterium atoms in the bcc crystal lattice of steel are in the charged state, are in octahedral sites, and at regular intervals, one can elaborate the arrangement of deuterium atoms in the hydride phase of steel with the deuterium concentration C = 1/2 at.D/at.met. = 0.5 (see Figure 8a, peak d in Figure 1). A further increase in the implanted deuterium concentration is accompanied by the formation of the lower-temperature hydride phase in the same crystal lattice, where the hydride structure with deuterium concentration C = 0.5 has already formed. This phase is formed due to both the newly implanted deuterium, and the earlier formed higher-temperature hydride phase (peak d). In this case, the local concentration of deuterium in the steel-lattice crystal structure reaches C = 1 at.D/at.met. (see Figure 8b, peak e in Figure 1). The decay of this lowest-temperature hydride phase in the deuterium thermodesorption spectrum is registered as a single peak. Note that in the Pd-D system, two stable hydride sublattices in palladium are also formed [42].Figure 8

Bottom Line: 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).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