ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
The effect of the betatizing conditions on microstructure, transformation characteristicsand pseudoelastic behavior has been studied in an unidirectionally solidified Cu-Al-Ni based alloy.The coarse γ2 phase is precipitated in the cast-rod betatized at 650[removed info] and the volume fraction of itis decreased by increasing the betatizing temperature above 700 [removed info]. However, a small amount of γ2phase is left behind despite betatizing at 800 [removed info]. No martensitic transformation takes place in thecast-rod betatized at 650[removed info], because the precipitation of γ2 phase leads to stabilization of β1 parentphase. However, β1→β1′ martensitic transformation occurs in the cast-rod betatized at 700 [removed info] andboth β1→β1′ and β1→γ1′ martensitic transformations concurrently undergoes in the cast-rodbetatized above 750 [removed info] because of the slope of Al concentration nearby γ2 phase. The loaddisplacementloop of the as-cast rod betatized at 750 [removed info] is linear, but those of the as-cast rodsbetatized at 800 [removed info] and 850 [removed info] are non-linear showing the typical pseudoelastic loop and thedeformation is completely recovered upon unloading
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.118.491.pdf
