The effect of subsequent stress‐induced martensite aging on the viscoelastic properties of aged NiTiHf polycrystals

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The effect of subsequent stress‐induced martensite aging on the viscoelastic properties of aged NiTiHf polycrystals	1 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.3390/met11121890

Title: The effect of subsequent stress‐induced martensite aging on the viscoelastic properties of aged NiTiHf polycrystals
Creator: Panchenko, Elena Yu.
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Tagiltsev, Anton I.
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Timofeeva, Ekaterina E.
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Chumlyakov, Yuri I.
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Marchenko, Ekaterina S.
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Karaman, Ibrahim
Date: 2021
DOI: 10.3390/met11121890
Description: This study investigated the effect of stress‐induced martensite aging under tensile and compressive stresses on the functional and viscoelastic properties in Ni50.3Ti32.2Hf17.5 polycrystals containing dispersed H‐phase particles up to 70 nm in size obtained by preliminary austenite aging at 873 K for 3 h. It was found that stress‐induced martensite aging at 428 K for 12 h results in the appearance of a two‐way shape memory effect of −0.5% in compression and +1.8% in tension. Moreover, a significant change in viscoelastic properties can be observed: an increase in internal friction (by 25%) and a change in elastic modulus in tensile samples. The increase in internal friction during martensitic transformation after stress‐induced martensite aging is associated with the oriented growth of thermal‐induced martensite. After stress‐induced martensite aging, the elastic modulus of martensite (EM) increased by 8 GPa, and the elastic modulus of austenite (EA) decreased by 8 GPa. It was shown that stress‐induced martensite aging strongly affects the functional and viscoelastic properties of material and can be used to control them.

Created: 18-05-2022

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Сибирский физико-технический институт The effect of subsequent stress‐induced martensite aging on the viscoelastic properties of aged NiTiHf polycrystals