Strain Path Change Effect on Deformation Behaviour of Materials with Low-to-Moderate Stacking Fault Energy

• Type: Article in International Conference Proceedings Book
• Date: 2008

Authors

Sakharova, NA (Author) Other; Vieira, MM (Author) Other; Fernandes, JV (Author) Other; Vieira, MF (Author) FEUP

Conference proceedings International

Title: ADVANCED MATERIALS FORUM IV

Pages: 420-424

13th Conference of the Sociedade-Portuguesa-de-Materiais/4th International Materials Symposium

Oporto, PORTUGAL, APR 01-04, 2007

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ISI Web of Knowledge - 2 Citations

Scopus - 2 Citations

Other information

Authenticus ID: P-004-288

DOI: 10.4028/www.scientific.net/msf.587-588.420

Abstract (EN): Stacking fault energy (SFE) plays an important role in face centred cubic (f.c.c.) metals and alloys in determining the prevailing mechanisms of plastic deformation. Low SFE metals and alloys have a tendency to develop mechanical twinning. besides dislocation slip, during plastic deformations. Deformation behaviour and microstructure evolution under simple and complex strain paths were studied in 70/30 brass, with small and intermediate grain sizes, which corresponds to a f.c.c. material with low SIT. Simple (rolling and tension) and complex (tension normal to previous rolling strain paths were performed. The macroscopic deformation behaviour of materials studied is discussed in terms of equivalent true stress vs. equivalent true strain responses and strain hardening rates normalized by shear modulus (d sigma/d epsilon)/G as vs (sigma - sigma(0))/G (sigma(0) is the initial yield stress of the material and G is the shear modulus). The mechanical behaviour is discussed with respect to dislocation and twin microstructure evolution developed in both, simple and complex Strain paths.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5