ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The internal friction (IF) and the Young’s modulus (E) of NiTi based alloys have beeninvestigated at 1 Hz and 1 kHz frequencies after various sequences of thermo-mechanicaltreatments and hydrogen-doping given to the materials. Differential scanning calorimetry (DSC)has also been used as a complementary investigation tool. Apart from the transient effects, onlyoccurring at 1 Hz frequencies, the data indicate a substantial insensitivity of damping to frequency.The results show that the H-Snoek and the H-twin boundary relaxations get their maximum heightfor H contents nH (nH=H/Me) equal to about 0.025 and 0.008, respectively. At kHz frequencies theIF peaks associated with these relaxations occur at around room temperature in the Ni49Ti51 andNi30Ti50Cu20 alloys. Thus, these appear to be the most promising materials for applications aimed atthe reduction of vibrations
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.319.1.pdf
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