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  • 1980-1984  (2)
  • 1982  (2)
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  • 1980-1984  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 1 (1982), S. 802-812 
    ISSN: 0392-6737
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Sono stati trattati termicamente mediante irradiazione laser continua dei provini nastriformi di metglas 2826. Diverse condizioni sono state ottenute variando la potenza del fascio e la durata dell'irradiazione. Un semplice modello termico ha consentito di ottenere le temperature raggiunte nei vari trattamenti e di stimare la possibilità di realizare o meno la cristallizzazione. Le previsioni sono state ben verificate dai risultati sperimentali. In particolare si sono misurate variazioni della magnetostrizione e del modulo di Young coerenti anche con le indicazioni della precedente letteratura.
    Abstract: Резюме Проводится C.w.-лазерный отжиг 2826 узких полосок Fe40Ni40P14B6; изменяя мощность пучка и время облучения. Разработана упрощенная модель для получения информации об увеличении температуры образцов и появлении кристаллизаџии. Предсказания согласуются с экспериментальными результатами. Изменения магнитных и механических свойств, индуцированные лазером, частично проверяются с помощью изменений магнитострикционного отклика и модуля юнга.
    Notes: Summary C.w. laser annealing of metglas 2826 ribbons was performed by varying beam power and irradiation time. A simplified thermal model was elaborated to have information about the temperature rise of the samples and the occurrence of crystallization. The predictions were in agreement with the experimental results. The laser-induced changes of magnetic and mechanical properties were particularly tested by means of the magnetostrictive response and the Young-modulus variations.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 1 (1982), S. 215-224 
    ISSN: 0392-6737
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si è riesaminata la magnetostrizione a saturazione di cilindri policristallini sottoposti a torsione. Lo sforzo critico oltre cui la magnetostrizione rimane costante è individuato con un metodo semisperimentale, che permette anche una stima dell'anisotropia cristallina. L'effetto di quest'ultima, a valori critici dello sforzo torsionale, non appare sinora ben spiegato, persino nel caso di semplice tensione. Si presenta una possibile interpretazione fondata sullo studio dell'andamento della magnetizzazione in approccio alla saturazione.
    Abstract: Резюме Исследуется влияние напряжений на насыщение магнитострикции поликристаллических стержней, подвергнутых кручению. Определяется критическое крутящее напряжение, вьше которого магнитострикция остается постоянной и оценивается уровень кристаллической анизотропии при различных кручениях. Как и в случае растяжения, до сих пор влияние кристаллической анизотропии на критическое напряжение не получило надлежащей интерпретации. Предлагается возможное объяснение поведения кривой намагничивания вблизи насьщения.
    Notes: Summary A contribution to the investigation of the stress effect on the saturation magnetostriction of polyerystalline rods stressed by torsion is presented. The critical torsional stress above which magnetostriction remains constant is found and the crystal anisotropy level, at various torsions, is estimated. As in the tensional case, the effect of crystal anisotropy at the critical stress has not been clearly interpreted so far. A study of the behaviour of the magnetization curve near saturation provides a possible explanation.
    Type of Medium: Electronic Resource
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