ISSN:
1662-9752
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:
CuAlNi shape memory alloy with Cu-13.5Al-4.5Ni(wt%) composition was prepared bycross-rolling method and the aging effect, phase transformation characteristics, microstructuralvariation were investigated. Transformation temperature was greatly increased in aged specimens at250˚C. Transformation temperature was not changed after the second reversed transformation, andMs point was same in most specimens with third reversed transformation cycle. The variation of Mspoint was not seen with aging at 100˚C, but it was decreased with aging at 250˚C. Transformationtemperatures appear to be constant, to an measurable extent, in specimens prepared by both hotrollingand cross-rolling at 900˚C. Plate shaped-specimen with the thickness of about 1mm wasprepared by cross-rolling treatment at 350˚C. The transformation temperatures did not change afterthe second transformation-reverse transformation cycling, and specially transformation starttemperature was the same in most specimens experiencing third thermal cycle and thereafter.Undesirable tweed-like structure was observed in 250˚C-aged specimen after a cross-rolling at350˚C. On aging the specimen prepared by cross-rolling, G.P zone was formed easier than that of γ2phase. This phase was transformed to plate-like θ phase during aging
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.3326.pdf
