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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.


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Diffractograms of 18Cr10NiTi steel: (а) initial and (b) irradiated with deuterium ions to 8.2 × 1017D/cm2.
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Fig6: Diffractograms of 18Cr10NiTi steel: (а) initial and (b) irradiated with deuterium ions to 8.2 × 1017D/cm2.

Mentions: X-ray diffraction studies of similar samples (see Figure 6) also provide evidence for the realization of the process of the shear martensitic structural transformation on attainment of the deuterium concentration C ≥ 0.5 at.D/at.met., namely, the appearance of the body-centered cubic (bcc) structure has been found against the background of intense lines of the fcc structure of the 18Cr10NiTi steel. A low bcc phase intensity is due to the fact that the approximately 150 nm thick implantation layer, where phase changes have taken place, is substantially smaller in thickness than the sample under study.Figure 6


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)

Diffractograms of 18Cr10NiTi steel: (а) initial and (b) irradiated with deuterium ions to 8.2 × 1017D/cm2.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Fig6: Diffractograms of 18Cr10NiTi steel: (а) initial and (b) irradiated with deuterium ions to 8.2 × 1017D/cm2.
Mentions: X-ray diffraction studies of similar samples (see Figure 6) also provide evidence for the realization of the process of the shear martensitic structural transformation on attainment of the deuterium concentration C ≥ 0.5 at.D/at.met., namely, the appearance of the body-centered cubic (bcc) structure has been found against the background of intense lines of the fcc structure of the 18Cr10NiTi steel. A low bcc phase intensity is due to the fact that the approximately 150 nm thick implantation layer, where phase changes have taken place, is substantially smaller in thickness than the sample under study.Figure 6

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