Portevin–Le Chatelier (PLC) instabilities and slant fracture in C–Mn steel round tensile specimens

Portevin–Le Chatelier (PLC) instabilities and slant fracture in C–Mn steel round tensile specimens

Round tensile specimens of a C–Mn steel were tested at different strain rates and temperatures. Some of the samples tested in the Portevin–Le Chatelier (PLC) domain exhibit slant fracture surfaces. Spherical dimples were evidenced all over the slant fracture surfaces. Numerical simulations showed th...

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Veröffentlicht in:Scripta materialia 2011-03, Vol.64 (5), p.430-433
Hauptverfasser: Wang, Huaidong, Berdin, Clotilde, Mazière, Matthieu, Forest, Samuel, Prioul, Claude, Parrot, Aurore, Le-Delliou, Patrick
Format: Artikel
Sprache:eng
Schlagworte:
Band orientation
Bands
Computer simulation
Dimpling
Engineering Sciences
Fracture mechanics
Fracture surfaces
Materials
Numerical modeling
Portevin–Le Chatelier instabilities
Product life cycle
Steels
Strain rate
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Zusammenfassung:Round tensile specimens of a C–Mn steel were tested at different strain rates and temperatures. Some of the samples tested in the Portevin–Le Chatelier (PLC) domain exhibit slant fracture surfaces. Spherical dimples were evidenced all over the slant fracture surfaces. Numerical simulations showed that stress triaxiality increases around PLC bands and that slant fracture occurs within a PLC band. In a round specimen, this band is plane and inclined, whereas some numerical results predict conical bands.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2010.11.005