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:
ULTIMET® alloy, a cobalt-based superalloy with good corrosion and wear resistantproperties, exhibits a deformation-induced phase transformation from the face-centered-cubic(FCC) phase to the hexagonal-close-packed (HCP) phase. The HCP phase formation duringmonotonic tensile loading was investigated using in-situ neutron diffraction. The HCP phase is firstobserved at a stress level of 810 MPa, which is well beyond macroscopic yielding. Strain analysisis performed on the FCC phase diffraction data in order to relate the lattice-strain development withthe evolution of the new HCP phase. A method of calculating the effective macroscopic stressassociated with the measured lattice strains is presented here. The effective stress can then becompared to the applied macroscopic stress in order to draw conclusions about the load-partitioningbehavior of the material as a new phase develops
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.524-525.893.pdf
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