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:
Submicron-grained Ti-50.9at%Ni alloy was prepared by Equal Channel Angular Extrusion(ECAE) at medium temperature(500ºC). Microstructure evolution and phase transformations ofTi-50.9at%Ni alloy after ECAE processes at medium temperature have been investigated by opticalmicroscope, TEM and DSC tests. It is found that the initial coarse grains of Ti-50.9at%Ni alloy wererefined into submicron grains, smaller than 0.5 um in size, after eight passes ECAE at 500ºC.Martensitic transformation temperatures decreased remarkably after one pass ECAE and more gentlywith increasing the pass number of ECAE. R phase transformation was stimulated after ECAEprocesses and underwent within a larger temperature range with an ambiguous thermal peak. Thereverse R phase and reverse martensitic transformations, during heating, were separated eventuallyafter eight passes ECAE
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.877.pdf
