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Original Title
Espectroscopia Moessbauer nos meteoritos Santa Catarina e Cape York sob a forma de po
Source
35. Annual Meeting of the Brazilian Society for the Advancement of Science; Belem, PA (Brazil); 6-13 Jul 1983; Published in summary form only.
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Journal Article
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Cienc. Cult. (Sao Paulo) Supl; v. 35(7); p. 260
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AbstractAbstract
[en] Nickel/titanium alloys having a nickel:titanium atomic ratio between about 1:02 and 1:13 and a vanadium content between about 4.6 and 25.0 atomic percent show constant stress versus strain behavior due to stress-induced martensite in the range from about 00 to 600 C
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Source
19 Mar 1985; v p; US PATENT DOCUMENT 4,505,767/A/; U.S. Commissioner of Patents, Washington, D.C. 20231, USA, $.50; PAT-APPL-541844.
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Patent
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Nemoshkalenko, V.V.; Andruschik, L.O.; Razumov, O.N.; Tomashevsky, N.A.; Trefilov, V.I.; Minakov, V.N.; Storchak, N.A.
7th Czechoslovak spectroscopic conference and 8th CANAS (Conference on analytical atomic spectroscopy). Abstracts. Vol. 31984
7th Czechoslovak spectroscopic conference and 8th CANAS (Conference on analytical atomic spectroscopy). Abstracts. Vol. 31984
AbstractAbstract
No abstract available
Source
Ceskoslovenska Akademie Ved, Prague. Ceskoslovenska Spektroskopicka Spolecnost; 187 p; 1984; p. 148; 7. Czechoslovak spectroscopic conference and 8. CANAS (conference on analytical atomic spectroscopy); Ceske Budejovice (Czechoslovakia); 18-22 Jun 1984; Published in summary form only.
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Miscellaneous
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AbstractAbstract
No abstract available
Original Title
Essai d'interpretation du spectre Moessbauer de la martensite vierge fer-carbone
Source
Meeting on hyperfine interactions as detected by nuclear radiations; Liege, Belgium; 11 Sep 1973
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Journal Article
Literature Type
Conference
Journal
J. Phys. (Paris), Colloq; (no.1); p. 25-26
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AbstractAbstract
No abstract available
Original Title
Estudo por espectroscopia Moessbauer da ferrita natural (Mn, Fe)3O4 tratada termicamente
Source
39. Annual Meeting of the Brazilian Society for the Advancement of Science; Brasilia, DF (Brazil); 12-18 Jul 1987; Published in summary form only.
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AbstractAbstract
[en] Experimental and theoretical investigations were made of the nature of energy absorption by a ferrite at a high parametric pump power. The kinetic instability appeared at a pump power exceeding by 18-20 dB the parametric excitation threshold. This instability created nonequilibrium packets of secondary spin waves which were not in resonance with the pump. A theory of the interaction of secondary and parametric spin waves was developed. Measurements were made of the imaginary part of the nonlinear susceptibility of the investigated ferrite as a function of the excess of the pump power above the kinetic instability threshold in magnetic fields from 1,040 to 1,290 Oe. The predictions of the theory were compared with the experimental results
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Secondary Subject
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Cover-to-cover translation of Zhurnal Ehksperimental'noj i Teoretic heskoj Fiziki (USSR).
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Translation
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AbstractAbstract
[en] Ti-Ni shape memory alloy thin films were deposited using an RF magnetron sputtering apparatus. The as-sputtered films were heat-treated in order to crystallize and memorize. After the heat treatment, the shape memory characteristics have been investigated using DSC and thermomechanical tests. Upon cooling the thin films, the solution-treated films showed a single peak in the DSC curve indicating a single stage transformation occurring from B2 to the martensitic phase, while the age-treated films showed double peaks indicating a two-stage transformation, i.e., from B2 to the R-phase, then to the martensitic phase. A perfect shape memory effect was achieved in these sputter-deposited Ti-Ni thin films in association both with the R-phase and martensitic transformations. Transformation temperatures increased linearly with increasing applied stress. The transformation strain also increased with increasing stress. The shape memory characteristics were strongly affected by heat-treatment conditions. (author)
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Journal Article
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Cameron, T.B.
Connecticut Univ., Storrs (USA)1984
Connecticut Univ., Storrs (USA)1984
AbstractAbstract
[en] Coincident carbon and boron solubility measurements on a carburized Fe-B alloy were used to determine the influence of carbon on boron solubility at temperatures from 800 to 1000 C. Carbon solubility was obtained from martensite hardness. Soluble boron levels were measured using the neutron autoradiography (NA) technique. Quantitative aspects of the NA technique were reviewed, and a model was developed to determine soluble boron levels from track density measurements. A new solid state NA track detector material (CR-39) was shown to provide improved etched track characteristics. Measured boron solubility in Fe indicated that the α/γ/Fe2B reaction is a eutectoid rather than a peritectoid type. The influence of carbon on boron solubility was evaluated and the results indicate that higher carbon levels result in decreased boron solubility values
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Source
1984; 142 p; University Microfilms Order No. 85-03,005; Thesis (Ph. D.).
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Report
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Thesis/Dissertation
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AbstractAbstract
[en] An austenitic nickel-chromium-iron base alloy is described consisting essentially of: about 0.04 to 0.09 wt. % carbon; about 1.5 to 2.5 wt. % manganese; about 0.5 to 1.6 wt. % silicon; about 0.035 to 0.08 wt. % phosphorus; about 13.3 to 16.5 wt. % chromium; about 13.7 to 16.0 wt. % nickel; about 1.0 to 3.0 wt. % molybdenum; about 0.10 to 0.35 wt. % titanium; up to about 0.20 wt. % zirconium; wherein for zirconium contents from 0.02 to 0.20 wt. % the carbon and phosphorus contents are selected from the group consisting of about 0.05 to 0.08 wt. % phosphorus and about 0.04 to 0.09 wt. % carbon, about 0.035 to 0.08 wt. % phosphorus and about 0.07 to 0.09 wt. % carbon, and about 0.05 to 0.08 wt. % phosphorus and about 0.07 to 0.09 wt. % carbon; and the balance of the alloy being essentially iron
Primary Subject
Source
18 Mar 1986; vp; US PATENT DOCUMENT 4,576,641/A/; U.S. Commissioner of Patents, Washington, D.C. 20231, USA, $.50
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Patent
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Lovey, Francisco; Amengual Colom, Antonio; Torra Ferre, Vicente
Comision Nacional de Energia Atomica, San Carlos de Bariloche (Argentina). Centro Atomico Bariloche1990
Comision Nacional de Energia Atomica, San Carlos de Bariloche (Argentina). Centro Atomico Bariloche1990
AbstractAbstract
[en] The shape memory effect is associated to a martensitic transformation in many materials. It consists in the ability of the material to recover its original shape after being deformed through or in the martensitic phase. This shape recovery occurs because the same parent phase is obtained after the retransformation. However, it is shown in this work that under very special circumstances two differently oriented variants of the parent phase can be obtained from a martensite single-variant. This breakdown of the shape memory effect was found after transforming a single-crystal into a unique plate of martensite by single interface-growth. During the retransformation two variants of parent phase appeared which were related to each other by the martensite symmetry operations (symmetry group C2h). The experimental results consist of those obtained applying the W-L-R phenomenological theory. (Author)
Primary Subject
Source
1990; 19 p; Available from Comision Nacional de Energia Atomica, Buenos Aires (AR). Library; Pre-print.
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