ISSN:
1662-8985
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:
Deformation characteristics and forming limit of ultrafine-grained bulk Al-Mg alloy wereexamined with upsetting process. The Al-7.5%Mg alloy produced by cryogenic milling and HIP wassubjected to hot hydrostatic extrusion as a final consolidation in fabricating the ultrafine-grained bulkmaterial. Upsetting was performed to study their mechanical characteristics in a practical formingprocess. The extruded specimen showed that the pores remained in spite of the HIP had beencollapsed and almost eliminated. The effective removal of the distributed pores resulted in significantincrease of formability by preventing early cracking. Metallographic investigations showed that thesize of grain remained below a few hundred nanometer scale in the processes
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.719.pdf