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:
The availability to produce Ti-6Al-4V sheet material with submicron-grainedmicrostructure for superplastic forming (SPF) has been studied. The laboratory scale sheets with anaverage grain size of 0.3 μm and the commercial size sheets with an average grain size of 0.65 μmwere produced by pack rolling manufacturing technique from the forgings with pre-formedsubmicrocrystalline (SMC) structure. The sheets possessing isotropic mechanical properties in thesheet plane had higher yield strength, ultimate tensile strength. Over the exceptionally lowtemperature range of 700-750ºC the SMC sheets demonstrated enhanced superplastic properties,namely an initial flow stress of 20-25 MPa and elongation more than 600% at the strain rate of3×10-4/s. The sheet material with SMC structure was characterized by well formability compared to aconventional sheet under low temperature superplastic conditions
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.551-552.31.pdf
