ISSN:
1662-9752
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
Stacking fault energy (SFE) plays an important role in face centred cubic (f.c.c.) metalsand alloys in determining the prevailing mechanisms of plastic deformation. Low SFE metals andalloys have a tendency to develop mechanical twinning, besides dislocation slip, during plasticdeformations. Deformation behaviour and microstructure evolution under simple and complexstrain paths were studied in 70/30 brass, with small and intermediate grain sizes, which correspondsto a f.c.c. material with low SFE. Simple (rolling and tension) and complex (tension normal toprevious rolling) strain paths were performed. The macroscopic deformation behaviour of materialsstudied is discussed in terms of equivalent true stress vs. equivalent true strain responses and strainhardening rates normalized by shear modulus (dσ/dε)/G as vs. (σ – σ0)/G (σ0 is the initial yieldstress of the material and G is the shear modulus). The mechanical behaviour is discussed withrespect to dislocation and twin microstructure evolution developed in both, simple and complexstrain paths
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.587-588.420.pdf
